std specifications - demolition - 2013 [unlocked by www.freemypdf.com]

DEMO13/INDEX.DOC(1) oym(151212) (DPG)

STANDARD SPECIFICATIONS

FOR

DEMOLITION WORKS

(2013 EDITION)


Published by Housing and Development Board, Republic of Singapore. No part of this document may be reproduced or copied in any form or by any means without the prior permission of the publisher.


HOUSING & DEVELOPMENT BOARD

STANDARD SPECIFICATIONS FOR DEMOLITION WORKS

INDEX

Page SECTION 1 GENERAL SPECIFICATIONS 1-1

TECHNICAL SPECIFICATIONS SECTION 2 DEMOLITION (GENERAL) 2-1 SECTION 3 DEMOLITION (TECHNICAL) 3-1 SECTION 4 TURFING 4-1 APPENDIX I STATEMENT OF UNDERTAKING APPENDIX II LETTER OF UNDERTAKING APPENDIX III NOTIFICATION OF DEMOLITION WORKS

The contents of this index on this page shall not be deemed to be part of the Specifications or be taken into consideration in the interpretation or construction thereof or of the Contract. HDB, being a ISO 14001 certified organisation, is committed to be the leader in environment management. The details of HDB's environmental policy can be found in the Corporate Philosophy at HDB Website http://www.hdb.gov.sg


GENERAL SPECIFICATIONS


SECTION 1 : GENERAL SPECIFICATIONS

CONTENT Page 1.1 GENERAL 1.1.1 Definitions, Abbreviations And Interpretations 1-1 1.1.2 Payment Of Employer's Bills, Expenses, Etc 1-2 1.1.3 Insurance Policies 1-2 1.1.4 Stamp Duties 1-4 1.1.5 Provisional Sum Items 1-4 1.1.6 Prime Cost Sums 1-4 1.1.7 Overclaim Leading To Overpayment 1-5 1.1.8 Bribery 1-5 1.1.9 Goods and Services Tax 1-5 1.1.10 Recovery Of Legal Costs For Court Proceedings 1-6 1.1.11 Assessment of Extension of Time Due to Exceptionally Inclement Weather 1-6 1.1.12 Contract Payment By GIRO/EPS 1-7 1.1.13 Restriction On Use Of Project Information For Publicity, Etc 1-7 1.1.14 Contract Documents On Site 1-7 1.1.15 Research Work 1-7 1.1.16 Mobile Handphone 1-7 1.1.17 Precautionary Measures To Be Taken During A Disease Pandemic 1-8 1.1.18 TOL Fee For Land Outside Contract Boundary 1-8 1.1.19 Site Occupation 1-8 1.1.20 Site Management 1-8 1.1.21 Site Layout Plan 1-9 1.1.22 Trespassers 1-9 1.1.23 Erection Of Temporary Buildings 1-9 1.1.24 Temporary Sanitary Facilities 1-9 1.1.25 Signboards 1-10 1.1.26 Provision Of Equipment On Site 1-10 1.1.27 Assignment Of Copyright Of Photographs, Etc 1-11 1.1.28 Cables/Services Detection 1-11 1.1.29 Diversion Of Services 1-11 1.1.30 Air Pollution Control 1-11 1.1.31 Noise Control 1-12 1.1.32 Pest Control And Surveillance 1-14 1.1.33 Protection Of Preserved Trees From Physical Damage 1-14 1.1.34 Works Within Railway Protection Zone And Railway Safety Zone 1-15 1.1.35 Cost Of Water And Electricity 1-16 1.1.36 Reinstatement And Making Good To Disturbed Areas 1-16 1.1.37 Lightning Protection To Temporary Buildings And Metal Structures 1-17 1.1.38 Access Roads And Protective Crossings 1-17 1.1.39 Care Of The Works And Materials 1-17 1.1.40 Damage To Public/Private Property 1-17 1.1.41 Treatment And Disposal OF General Waste And Debris 1-17 1.1.42 Silt Control 1-18 1.1.43 Cleaning of Drains, Culverts And Footpaths 1-18 1.1.44 Control Of Oil/Diesel/Chemical Spillage 1-18 1.1.45 Cleaning Of Public And HDB Maintained Roads 1-19 1.1.46 Cleaning Up On Substantial Completion 1-19 1.1.47 Completion Of Site Works 1-19 1.1.48 Handing Over Of Completed Works And Certification Of Substantial Completion 1-19 1.1.49 Time Required For Contractor For Preparation Of Handing Over Inspection 1-20 1.1.50 Rectification Of Defects After Certification Of Substantial Completion 1-20 1.1.51 Nuisance And Irregularities 1-20 1.1.52 Trade Subcontractors 1-21


SECTION 1 : GENERAL SPECIFICATIONS (CONT'D)

CONTENT Page 1.2 MATERIALS - GENERAL 1.2.1 Metric Components 1-22 1.2.2 Materials And Workmanship 1-22 1.2.3 Approval Of Samples And Trades Names 1-22 1.2.4 Quality Certificate 1-23 1.2.5 Samples 1-24 1.2.6 Precautions Against Materials Being Taken Out Of Site 1-24 1.2.7 Approval For Use Of Ready-Mixed Concrete 1-24 1.3 LABOUR 1.3.1 Labour Laws 1-25 1.3.2 Keeping Records of Workmen 1-25 1.3.3 Training for Singapore Civil Defence Force And Other Government Authorities 1-25 1.3.4 Employment of Illegal Immigrants 1-25 1.3.5 Engagement Of Professional Engineers 1-26 1.3.6 Employment Of Contractor's Site Personnel 1-26 1.4 SAFETY 1.4.1 Site Safety Measures 1-31 1.4.2 Safety Infringement 1-41 1.4.3 Reporting Of Accidents 1-42

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DEMO13/S1.DOC(1) oym(151212) (DPG)

HOUSING & DEVELOPMENT BOARD

STANDARD SPECIFICATIONS FOR DEMOLITION WORKS

SECTION 1 1.0 GENERAL SPECIFICATIONS 1.1 GENERAL 1.1.1 Definitions, Abbreviations And Interpretations In the Specifications, the following words and expressions shall have the meanings hereby assigned

to them except where the context otherwise requires: "as approved" shall mean as approved by the Superintending Officer's Representative. "as directed" shall mean as directed by the Superintending Officer's Representative. "or other approved" shall mean as approved by the Superintending Officer's Representative and

as further defined in subclause 1.2.3 "Approval of Samples and Trades Names" of the General Specifications.

"as required" or shall mean as required or as shown or as indicated in the Drawings "as shown" or and/or Specifications. "as indicated" or "as specified" The following abbreviations are used in the Specifications : AISI - American Iron & Steel Institute ANSI - American National Standard Institute ASTM - American Society for Testing and Material BS - British Standard BCA - Building and Construction Authority CPF - Central Provident Fund Board CP - Code of Practice DIN - Deutsche Industrie – Normen EMA - Energy Market Authority ENV - Ministry of the Environment FSSD - Fire Safety and Shelter Department HDB - Housing & Development Board LTA - Land Transport Authority MOM - Ministry of Manpower NEA - National Environment Agency PowerGas - Powergas Limited PowerGrid or Grid - Powergrid Limited PSB - TUV SUD PSB Pte Ltd PUB - Public Utilities Board or any of its undertaking where applicable SINGLAS - Singapore Laboratory Accreditation Scheme SINGTEL - Singapore Telecommunications Ltd SS - Singapore Standard

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1.1.1 Definitions, Abbreviations And Interpretations (Cont'd) Words importing the singular shall also include the plural and vice versa where the context requires. The clause headings in the Specifications shall not be deemed to be part thereof or be taken into

consideration in the interpretation or construction thereof or of the Contract. All clauses in the Specifications shall be deemed to be directed at the Contractor unless expressly

specified otherwise to the contrary and the Contractor shall perform and/or comply with such instructions, directions, requirements and obligations specified in the Specifications and required under the Contract.

All Acts of Parliament, statutes, regulations, bye-laws, orders, local and foreign standards and codes

of practice specified shall be deemed to refer to the latest and shall be deemed to include any amendments, and/or modifications and/or additions and/or re-enactments thereto.

1.1.2 Payment Of Employer's Bills, Expenses, Etc The Contractor shall duly and punctually pay to the Employer the billed and any other expenses

incurred by the Employer in respect of the supply of materials, services, etc. The Contractor shall also pay to the Employer interest at the rate of seven percent per annum or such

other rate as may be determined from time to time by the Employer in respect of any arrears of payment or other outstanding sums due and payable to the Employer, from the due dates until payment in full is received by the Employer.

The Employer reserves the right to set off such bills and expenses against monies due or becoming

due to the Contractor before payment of the balance, if any, to the Contractor. In this respect, all Employer's bills and other expenses due from the Contractor shall have priority over debts due to third parties.

1.1.3 Insurance Policies The Contractor shall warrant that the insurance policies issued in accordance with Clauses 27 and 28

of the Conditions shall include the following requirements : (A) Insurance For Work Injury Compensation (i) The Policy shall be issued in the prescribed form issued by HDB. (ii) The Insured shall be "(Name of Contractor to insert) as Contractor and all his sub-

contractors, and the Employer (Name of Employer to insert) as Principal FTRR & I". (iii) The period of insurance shall commence from the date the Site is handed over to the

Contractor and shall end upon expiry of the Defects Liability Period under the Contract. The Policy shall firstly cover the whole of the original Time for Completion plus 6 months and plus a further 12 months for Defects Liability Period where applicable.

(B) Insurance For Personal Injury And Property Damage (i) The Policy shall be issued in the joint names of the Employer, the Contractor and all his

sub-contractors. (ii) The limits of liability shall be read as follows : (a) In respect of any one accident : $2,000,000.00 (b) Unlimited for the period of insurance (iii) The period of insurance shall commence from the date the Site is handed over to the


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1.1.3 Insurance Policies (Cont'd) (B) Insurance For Personal Injury And Property Damage (Cont'd) (iv) The period of notice for cancellation of the Policy, if such period is stipulated, shall read

30 days. (v) The Policy shall expressly include coverage of the following risks : (a) Death, bodily injury or damage to property caused or occasioned by the Insured's

sub-contractors or by such sub-contractors’ employees. (b) Death, bodily injury or damage to property caused or occasioned by or connected

with or arising from the ownership, possession or use by or on behalf of the Insured of any equipment or machinery not expressly specified in the Schedule of such equipment or machinery.

(c) Liability assumed by the Insured by agreement, unless such liability would have

attached to the Insured notwithstanding such agreement. (d) Liability in respect of loss or damage to property belonging to or in the charge or

control of the Insured or of any servant or agent of the Insured. (e) Liability in respect of injury to or illness of any person or loss or damage to any

property or land or building caused by vibration or removal or weakening of support.

(f) Liability in respect of injury, illness, loss or damage caused by or connected with

or arising from any commodity, article or thing supplied, repaired, altered or treated by or to the order of the Insured, happening at any of the Insured's premises.

(vi) The Policy shall expressly contain the following endorsements : (a) "This Policy shall cover all the Contractor’s insurance obligations with regard to

personal injuries or death and injury or damage to property real or personal (including property of the Housing & Development Board but not the Works themselves) arising out of or in the course of or by reasons of the carrying out of the Works stated in the Contract between the Housing & Development Board and the Contractor (name of Contractor to insert)."

(b) "Each of the parties comprising the Insured shall for the purpose of this Policy be

considered as a separate and distinct unit and the words “the Insured” shall be considered as applying to such party in the same manner as if a separate policy had been issued to each of the parties and the insurers hereby agree to waive all rights of subrogation action which they may have or acquire against any of the aforesaid parties arising out of any accident in respect of which any claim is made hereunder provided nevertheless that nothing in this clause shall be deemed to increase the limitation on extent of Insurer’s liability in respect of any one accident or series of accidents as stated in the Schedule."

(c) "This Policy is extended to cover the employees and/or representatives of the

Housing & Development Board, consultants, other professional parties and Resident Technical Officer whilst on the contract site as third parties".

(d) "Notwithstanding anything stated in the Policy to the contrary, cover under the

Policy shall not be suspended in the event of stoppage of work by the Contractor on the contract site from any cause for a period not exceeding 90 days. In the event of partial or total cessation of work, the Insured shall use diligence and do all things reasonably practicable to protect the insured property. Subject otherwise to the Terms Exceptions and Conditions of this Policy".

(e) "All deductibles shall be borne by the Contractor".

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1.1.3 Insurance Policies (Cont'd) (C) Insurance For Works (i) The Policy shall be issued in the joint names of the Employer and the Contractor. (ii) The Works insured shall read the project title given in the Employer’s Letter of

Acceptance. (iii) The sum insured shall be the same as specified in the Appendix of Public Sector

Standard Conditions of Contract. (iv) The period of insurance shall commence from the date the Site is handed over to the


(v) The period of notice for cancellation of the Policy, if such period is stipulated, shall read

30 days. (vi) The policy shall expressly contain the following endorsements : (a) "This Policy shall cover all the Contractor’s Works insurance obligations stated in

the Contract between the Housing & Development Board and the Contractor (name of Contractor to insert)."

(b) "Notwithstanding anything stated in the Policy to the contrary, cover under the

Policy shall not be suspended in the event of stoppage of work by the Contractor on the contract site from any cause for a period not exceeding 90 days. In the event of partial or total cessation of work, the Insured shall use diligence and do all things reasonably practicable to protect the insured property. Subject otherwise to the Terms Exceptions and Conditions of this Policy".

(c) "All deductibles shall be borne by the Contractor". 1.1.4 Stamp Duties The Contractor shall have all documents required by or arising out of or in connection with this

Contract properly stamped to comply with the Stamp Duties Act. The cost and expense arising out of this obligation, including all stamp duties required, shall be borne by the Contractor and shall be deemed to have been allowed for in the Contract Sum.

1.1.5 Provisional Sum Items Where Provisional Sum Items are included in the Contract, they shall be inclusive of all costs

necessary in carrying out or supplying the work, materials or goods. These Provisional Sum Items shall be inclusive of the Contractor's profit and overheads but shall be net of trade and cash discounts.

1.1.6 Prime Cost Sums Where Prime Cost Sums (P.C. Sums) are provided for any work, materials or goods, these sums shall

be inclusive of carriage but exclusive of Contractor's profit and attendance. These P.C. Sums shall also be net of trade and cash discounts.

The Contractor shall allow and separately price for profit and attendance in respect of such P.C. Sums

in the Form of Tender. P.C. Sums shall be deducted from the Contract Sum and in lieu thereof shall be added the sums due

to the Contractor for the said work, materials or goods. The sum allowed by the Contractor in the Contract for attendance in respect of any P.C. Sum shall be fixed regardless of whether the actual sum expended is greater or less than the P.C. Sum. In respect of profit, the amount to be paid shall be the percentage quoted by the Contractor against the actual sum expended in relation to the P.C. Sum.

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1.1.6 Prime Cost Sums (Cont'd) Should the work, materials or goods for which a P.C. Sum is provided in the Contract be not required,

or if the Employer chooses to carry out or supply the aforesaid work, materials or goods by his own workmen or by other contractors, which the Employer is contractually entitled so to choose, then such P.C. Sum together with the profit and attendance allowed by the Contractor in the Contract shall be deducted in full from the Contract Sum.

Should the Contractor himself be engaged or instructed to carry out or supply any work, materials or

goods under a P.C. Sum, the profit and attendance allowed by the Contractor in the Contract in respect of the P.C. Sum shall be deducted in full from the Contract Sum. In such event, the amount to be paid to the Contractor for the work, materials or goods shall be inclusive of the Contractor's overheads and profit for the work, materials and goods.

1.1.7 Overclaim Leading To Overpayment If at any time during the Time for Completion and any time period where liquidated damages are

imposed under the Contract, the Contractor is found to have over-claimed and was paid for more than the value of the Permanent Works carried out and/or approved unfixed materials at the Site, the Superintending Officer's Representative shall be empowered to deduct from the Contractor's subsequent payments the sum overpaid together with the Employer's charge and interest calculated at seven percent per annum.

1.1.8 Bribery During the currency of this Contract, the Contractor and his authorized agents or representatives shall

not offer or attempt to offer any bribes, commission or gift to the Employer's employees. Should it be discovered that bribes, commission or gift have been given to any of the Employer's employees, the employment of the Contractor under this Contract may be terminated. The decision of the Superintending Officer with regard to the interpretation and implementation of this Clause shall be final and binding on and conclusive against the Contractor.

1.1.9 Goods and Services Tax The Contractor shall not include in the rates and prices quoted in the Contract Sum, the GST

chargeable for the supply of goods, services or Works required in the Contract. All rates and prices quoted shall be exclusive of the GST.

The Employer shall reimburse the Contractor any GST charged on the goods, services or Works

supplied. The Contractor shall declare his GST status in his Tender. The Contractor shall clearly indicate

whether he is, or whether he will be a taxable person under the GST Act. The Contractor shall, if available, furnish the GST registration number to the Employer.

The Contractor will be deemed to be a taxable person if no declaration to the contrary is made in the

Form of Tender. The Contractor who declares himself to be a non-taxable person under the GST Act but who becomes a taxable person after he has been awarded the contract shall forthwith inform the Employer of his change in GST status. The Contractor shall be entitled to reimbursement by the Employer of any GST charged on the goods, services or Works he supplies after his change in GST status.

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1.1.10 Recovery Of Legal Costs For Court Proceedings All legal costs, charges and expenses (including but not limited to solicitors' fees as between solicitor

and client) incurred by the Employer for the purpose of or incidental to the enforcement by the Employer of any rights and remedies under the Contract or any other contracts between the Employer and the Contractor or in respect of any garnishee proceedings which may be brought or commenced against the Employer by the Contractor's creditors may be deducted by the Employer from monies due or becoming due to the Contractor including any retention monies, financial bonds or security deposits or other bonds.

1.1.11 Assessment Of Extension Of Time Due To Exceptionally Inclement Weather The assessment of exceptionally inclement weather shall not take place until the expiry of the Time

for Completion or previously extended Time for Completion. Such assessment shall be made on the following basis :

(a) There shall first be assessed the number of wet days and equivalent wet days (as specified in

paragraph (f) below on which the Contractor has been substantially delayed in the carrying out of the Works by rain (hereinafter called "delay days").

(b) A wet day shall be one where the rainfall figure as calculated as described in this sub-

paragraph exceeds 10.2 mm during the 24 hour period used by the Meteorological Service. The rainfall figure shall be the average island-wide rainfall calculated by the Employer using rainfall records received by the Employer monthly from the 5 Standard Stations of the Meteorological Service.

(c) The expected number of wet days during the Time for Completion or extended Time for

Completion as the case may be shall be derived from the following table which is deemed to record the average number of wet days for the respective months based on the Meteorological

Service's records between 2002 and 2011 (hereinafter call "expected wet days") :

Jan Feb Mar Apr May Jun

8 3 9 9 6 5

Jul Aug Sep Oct Nov Dec

7 6 7 8 10 9 (d) For each month of the Time for Completion or extended Time for Completion as the case may

be there shall be assessed whether the number of delay days in that month is more than (positive) or equal to (zero) or less than (negative) the expected wet days in that month.

(e) The positive, zero and negative monthly assessments made in accordance with paragraph (d)

above shall then be added together and a net total reached. If such total is a positive number then such total shall constitute the extension of time due to exceptionally inclement weather.

(f) The period commencing from excavation works to the completion is hereinafter called "sub-

structure period" and the works carried out during such period is hereinafter called "sub-structure works".

For the assessment of extension of time due to exceptionally inclement weather during the

sub-structure period, the respective monthly average number of wet days as specified in paragraph (b) above shall be multiplied by a factor of 2.0 if the wet days are less than or equal to 5 or by a factor of 1.6 if the wet days exceed 5. The product so derived shall be referred to as "equivalent wet days" and are subject to a maximum of 30 days per month.

(g) If the sub-structure works do not commence on the first day of the month, then the number of

equivalent wet days for that month in which the sub-structure works commence shall be pro-rated in accordance with the proportion of the number of calendar days for the sub-structure works in that month to the total number of calendar days in the said month. Similarly, if the sub-structure works are not completed on the last calendar day of the month, then the number of equivalent wet days for that month in which the sub-structure works are completed shall be pro-rated in accordance with the proportion of the number of calendar days for the sub-structure works in that month to the total number of calendar days in the said month.

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1.1.12 Contract Payment By GIRO/EPS All payments under the Contract by the Employer to the Contractor shall be effected through the Inter-

bank GIRO System and/or other Electronic Payment Systems. The Contractor shall submit all the necessary forms, such as Inter-bank GIRO (IBG) form, etc., duly

completed and signed, to the Finance Department, HDB, HDB HUB, 480 Lorong 6, Toa Payoh, Singapore 310480; within fourteen days from the date of the Letter of Acceptance to effect payments through such Systems.

In the event the payment arrangement through such Systems terminates for whatever reasons, the

Contractor shall re-submit all the necessary forms to the Finance Department within 14 days from the date of the termination.

The preceding requirements shall not be applicable to payments by the Employer to the Contractor in

approved foreign currencies. 1.1.13 Restriction On Use Of Project Information For Publicity, Etc The Contractor shall ensure that he or his subcontractors/suppliers do not quote or make reference to

the project design, products, technologies or methods of construction used in the Works for trade promotion, advertisement, publicity, etc or for any other purposes without the written approval of the Superintending Officer's Representative. This requirement shall not be applicable to proprietary products, technologies or methods of demolition introduced by the Contractor or his subcontractor/suppliers.

1.1.14 Contract Documents On Site The Contractor shall keep a complete set of the signed Contract documents described in the

Agreement; and a complete set of the further or revised Drawings and instructions referred to in the Conditions, at the Site. The documents shall be made available for inspection and use by the Superintending Officer, Superintending Officer Representative and any other person authorised by the Superintending Officer in writing.

1.1.15 Research Work The Contractor shall provide and render all necessary assistance to the Superintending Officer's

Representative or other authorised persons conducting research work or procuring publicity materials on any aspects of the work in progress. When directed by the Superintending Officer's Representative, the Contractor shall also provide all brochures, quotations, sub-contract agreements, invoices, etc. from his subcontractors, suppliers and specialists for goods and services provided for the Works, all at the Contractor's cost and expense.

1.1.16 Mobile Handphone The Contractor shall maintain at least one mobile handphone to receive telephone call by the

Superintending Officer's Representative for the duration of the contract period. Upon award of the Contract, the Contractor shall immediately provide to the Superintending Officer's

Representative the handphone number. The Contractor shall ensure that his representatives holding the handphone are contactable 24 hours a day throughout the contract period. This is to facilitate the issuance of instruction by the Superintending Officer's Representative. The handphone must be switched on at all times throughout the contract period and the Contractor shall ensure that the handphone and the batteries used are in good working condition at all times.

All fees and expenditure incurred for the application/installation/maintenance of the handphone shall

be borne by the Contractor.

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1.1.17 Precautionary Measures To Be Taken During A Disease Pandemic The contractor shall be required to implement necessary precautionary measures as advised by the

Ministry of Health or other relevant Authorities during a disease pandemic. Based on the recommendations from the government's advisory, the contractor shall follow up expeditiously to plan for such contingency and stock up necessary supplies or equipment (eg thermometers) so as to be able to implement the required measures in a short notice.

1.1.18 TOL Fee For Land Outside Contract Boundary Where the Contractor requires land outside the contract boundary for the setting up of construction

equipment and other temporary facilities for the Works, the Contractor shall check on the availability of such land and apply to the relevant Authority or Lands Management Section of HDB for the use of such land. In the event the relevant Authority or HDB's Lands Management Unit allows the Contractor the use of such land, the Contractor shall at his own cost and expense comply with all the terms and conditions, pay all TOL (Temporary Occupation Licence) fees, bear all costs and expenses for the use and maintenance of and access to the said land imposed by the relevant Authority or HDB's Lands Management Section.

The Contractor shall use such land allocated solely for the purpose of executing this Contract only. Any payment for unused materials or goods stored at such land shall be subject to the provisions in

Option Module B "Unused Materials or Goods not Delivered to Site" of the Conditions. 1.1.19 Site Occupation The Employer has engaged and/or will engage another contractor or other contractors who will be in

occupation of the Site at the same time as the Contractor is carrying out the Works and the Contractor shall not make any claim against the Employer in respect of acts or omissions of such other contractor or contractors other than claims falling within Clause 14 of the Conditions. The Contractor shall not delay or obstruct or interfere with such other contractors in the carrying out of their works.

1.1.20 Site Management At least 14 days before the commencement of the Works, the Contractor shall submit to the

Superintending Officer's Representative for his approval the following details on site planning : (a) Site organisation structure (b) Names and roles of Contractor's staff (c) Names and roles of sub-contractors (d) Site layout plan as specified in the Specifications (e) Schedule of equipment (f) Master Schedule of Demolition for each Block as specified Furnish the Superintending Officer's Representative with such further details and information as the

Superintending Officer's Representative may require in regard to the above items. Should it appear to the Superintending Officer's Representative at any time that the site planning

proposed by the Contractor is not able to ensure a smooth progress of the Works, the Superintending Officer's Representative is empowered to require the Contractor to make at the Contractor's own cost and expense all necessary modifications to the plans.

Approval by the Superintending Officer's Representative of the Contractor's site planning details,

revised site planning details and further information provided under this clause shall not in any way affect the Contractor's liabilities or obligations under the Contract.

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1.1.21 Site Layout Plan After the Contract is awarded, submit a site layout plan to the Superintending Officer's Representative

indicating proposed locations of all temporary structures for approval before their erection. Notwithstanding such approval, the Contractor shall relocate any such structures at his own cost and expense when required to do so by the Superintending Officer's Representative.

All such materials and structures shall be kept away from proposed roads, driveways, car parks and

services lines. Should any hoistway or structure be erected without the approval of the Superintending Officer's

Representative, the Contractor shall pull down and re-erect the hoistway or structure in an approved position within seven days from the date of instruction by the Superintending Officer's Representative.

The Contractor shall provide for the maintenance of all such structures in a clean, hygienic and safe

condition for the duration of the Works. All such structures shall be removed on Substantial Completion of the Works. 1.1.22 Trespassers After the Site has been handed over to the Contractor, he shall be responsible for preventing all

unauthorised persons from entering or occupying the premises. When directed, the Contractor shall erect signboards to warn the public that trespassers will be prosecuted.

1.1.23 Erection Of Temporary Buildings The Contractor shall submit detailed structural plans and design calculations, certified by his PE, for

temporary buildings of two storeys or higher, to the SO Rep not later than three months from the commencement date of the Time for Completion or 2 weeks before the actual commencement of the Works for such proposals whichever is earlier.

The design and submission of the temporary buildings in compliance with the Technical Guidelines for

the Fire Safety in Temporary Buildings in Construction Sites, including any amendment thereto, issued by FSSD; and the Building Control (Temporary Buildings) Regulations (2000 edition) including any latest requirements by BCD, BCA.

The Contractor shall erect all such temporary buildings in strict compliance with his Professional

Engineer's plans and calculations. The Works shall be supervised by the Contractor's PE. Not later than two weeks after the completion of the Works, the Contractor's PE shall submit a

Certificate of Supervision, stating that he has carried out such supervision work and is fully satisfied that the Works have been constructed in accordance with his structural plans and design calculations as approved by the SO Rep.

1.1.24 Temporary Sanitary Facilities The Contractor shall when directed provide temporary sanitary facilities with adequate lighting on the

Site in suitable structures to be approved by the Superintending Officer's Representative. The temporary sanitary facilities shall contain water closets in the proportion of 1 closet to every 25 workmen, for the duration of the Works. Prior written approval by the Superintending Officer's Representative shall be obtained before erection of these facilities.

The temporary sanitary facility shall be of a type, make and pattern approved by the PUB. All waste discharge from the water closets and all waste water from the temporary sanitary facilities

and from the Site shall be discharged into a public sewer. Arrange with the PUB to carry out connection work from the temporary sanitary facilities to the public sewer and pay all charges and maintenance in connection therewith. The Contractor shall be responsible for all damages to and shall indemnify the Employer against all liabilities in respect of such sewer connections.

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1.1.24 Temporary Sanitary Facilities (Cont'd) Where a public sewer is not available or where it is not possible to connect to a public sewer, the

Contractor shall at its own cost and expense provide and install temporary septic tanks of a type, pattern and capacity approved by the PUB, to serve the water closets.

Prior to commencing the installation of the temporary septic tanks on the Site, the Contractor shall

engage a Licensed Plumber who shall submit his proposal to the PUB and SO Rep for approval. The proposal shall include the manner and frequency of post installation management and maintenance of the septic tanks on the Site. The Contractor and his Licensed Plumber shall be fully responsible for any mis-management or mis-use of the temporary sanitary facilities, which may result in the pollution of the controlled water course.

1.1.25 Signboards Where erection of signboards with more than one language is required, all translations shall be

carried out by competent translators approved by the Superintending Officer's Representative. All completed signboards shall be approved by the Superintending Officer's Representative before they are erected. The Contractor shall bear all cost and expense arising.

1.1.26 Provision Of Equipment On Site (A) Camera On Site The Contractor shall provide an auto-focus camera on the Site throughout the Time for

Completion and any time period where liquidated damages are imposed under the Contract for the purpose of photographing site occurrences (within the Contract) by the Superintending Officer's Representative. The camera must have zooming function capable of producing reasonably sharp and clear photographs with current dates. The Contractor shall bear all expenses incurred arising from usage of the camera which is related to the Works. The Contractor shall be responsible for its continuous and proper functioning.

(B) Safety Helmets And Safety Boots The Contractor shall provide safety helmets and safety boots for use by the Employer's officers

and visitors visiting the Site throughout the Time for Completion and any time period where liquidated damages are imposed under the Contract. The ownership of the safety helmets and safety boots shall be reverted back to the Contractor upon the satisfactory Substantial Completion of the Works.

The requirements are as follows : (a) Safety Helmets (i) white colour with HDB logo in front of helmet. (Colour code for HDB logo : Pantone 485) (ii) complete with canvas chin straps and sweat resisting lining. (iii) comply with SS98:1987. (b) Safety Boots (i) at least 24 cm in height (ii) black/brown colour with steel toe cap (iii) long-wearing (iv) of great flexibility and resilience (v) slip proof, resistant to oil, acid and heat (vi) nail proof (vii) of excellent insulation (viii) comfortable and light (ix) comply with SS105:1987 The Contractor shall immediately replace those safety helmets and safety boots which the

Superintending Officer's Representative considers to be not in good working condition.

Demo Spec Page 1-11


1.1.27 Assignment Of Copyright Of Photographs, Etc The Contractor shall assign the copyright of the photographs (including the

prints/slides/transparencies/ negative) taken and all documents prepared under this Contract to the Employer.

The Employer shall have unfettered rights to use or reproduce all the photographs (including the

prints/slides/transparencies/negatives) taken and all documents prepared by the Contractor under this Contract for any purpose other than for the purpose for which the Contract was entered into.

In the event that the Contractor engages third parties to take the photographs (including the

prints/slides/transparencies/negatives) or prepare the documents, the Contractor shall procure the assignment of the copyright from such third parties to himself and thereafter, assign the copyright to the Employer.

The Contractor and/or any third parties are strictly prohibited from using or reproducing any of the

photographs (including the prints/slides/transparencies/negatives) taken and all documents prepared under this Contract in any other publication or for any other purpose whatsoever.

1.1.28 Cables/Services Detection The Contractor shall be deemed to have visited and examined the Site carefully and have ascertained

its nature and made provision in the Contract Sum or prices for the type of ground conditions, constraints and underground services.

The Contractor shall engage PUB licensed cables/services detection workers to carry out all

cables/services detection work to locate all existing cables/services prior to the commencement of any works which are liable to damage existing buried services. The proposed line of work shall be checked for existing services in a systematic manner by making sufficient passes in a grid formation to cover the entire area of work.

The extent of checking carried out shall be properly documented. The Contractor shall be liable for all

costs and charges incurred if he damages any services. The Contractor shall seek assistance from the relevant Government Department or Statutory Board if

he has any query on the location of existing cables/services belonging to the Government Department or Statutory Board. In the case of PUB, PowerGrid, PowerGas or SPSL cables/services, the Contractor may seek assistance from the Earthworks Monitoring and Cable Protection Section, PowerGrid, PowerGas or SPSL.

In addition, the Contractor shall engage the services of Registered Excavator Operator only for all

excavation works. In the event the Contractor fails to employ Registered Excavator Operator, no excavation works shall be allowed.

1.1.29 Diversion of Services Where in the case the Superintending Officer's Representative is of the opinion that it becomes

essential to divert permanently any sewer, drain, pipe, cable, or other services, the cost for the diversion shall be borne by the Employer. Provided always that such diversion does not form part of the Works.

1.1.30 Air Pollution Control The Contractor shall comply with the relevant provisions of the Environmental Pollution Control (Air

Impurities) Regulations 2000 and/or any requirement of other relevant Authorities. The Contractors shall take all necessary measures to identify the possible sources of air pollution

within the sites and step up measures to monitor and control air pollution to a tolerable level and to comply with ENV and NEA requirements.

.

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1.1.30 Air Pollution Control (Cont’d) The Contractor shall take all necessary measures to identify and abate the excessive discharge of

smoke, fumes or obnoxious gases from any Construction Equipment on the Site. The Contractor shall to submit to the Superintending Officer’s Representative record of the latest overhaul servicing for all Construction Equipment brought onto site. The latest overhaul servicing shall be within 6 months from the date the Construction Equipment is brought onto Site. The Contractor shall also carry out visual inspection on all Construction Equipment on a daily basis to gauge the level of smoke and fume emission

When notified by the Superintending Officer's Representative that a particular Construction

Equipment is discharging excessive smoke, fumes or obnoxious gases, the Contractor shall stop the use of the Construction Equipment, take immediate step to remove the Construction Equipment from site and replace the same with acceptable Construction Equipment, failing which the Superintending Officer’s Representative may exercise his right under the Nuisance and Irregularities Clause against the Contractor.

The Contractor shall also establish a periodic preventive maintenance schedule for all Construction

Equipment to ensure that the Construction Equipment does not emit excessive fume and smoke. No claims from the Contractor for extension of time for completion or costs and expenses shall be

entertained on account of the foregoing. 1.1.31 NOISE CONTROL Judicious management and control over the activities within the Site shall be exercised by the

Contractor for the abatement of noise nuisance. The Contractor shall take all necessary actions to ensure compliance to the Environmental Pollution Control (Control of Noise at Construction Site) Amendment Regulations 2001 or any latest noise control regulations imposed by the relevant Authorities.

(a) Permissible Noise Level The noise level at the nearest occupied building outside the Site shall not exceed the following

maximum permissible noise level or any other noise control guidelines introduced by the Ministry of Environment and or National Environment Agency whichever is the more stringent:

Type of Occupied Buildings Applicable Period

Maximum Allowable Equivalent Continuous Noise Level Measured Over a Period of 5 Minutes in dB

(LA eq.5min)

(a) Hospital, School, Home for the Aged, Sick, etc

7 am to 7 pm 75

7 pm to 10 am 55

10 pm to 7 am 55

(b) Residential buildings location less than 150m from the construction site where the noise is being emitted

7 am to 7 pm 90

7 pm to 10 am 70

10 pm to 7 am 60

(c) Buildings other than those in (a) and (b) above.

7 am to 7 pm 90

7 pm to 10 am 70

10 pm to 7 am 70

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1.1.31 NOISE CONTROL (Cont’d) (b) Specifications of Sound Monitoring System The Contractor shall submit his proposal for the sound monitoring system, with details of the

meter model, installation and location etc, to the Superintending Officer's Representative within 14 days from the date of the Letter of Acceptance.

The sound level meter shall comply with BS 6698 (1986) or IEC 804: 1985 and the following

requirements and shall met all requirements imposed by the relevant Authority: (i) The integrating sound level meter shall be capable of producing equivalent continuous

A-weighted sound pressure level for various time durations required by the Superintending Officer's Representative.

(ii) The integrating sound level meter shall meet Type 1 standard as specified in BS6698

(1986) or IEC 804: 1985. (iii) The sound level meter shall have a laboratory calibration certificate dated not more than

3 months before the commencement date of the Time for Completion. The integrating sound level meter shall be sent to an approved laboratory for calibration when required as decided by the Superintending Officer's Representative.

(iv) A portable calibrator shall be provided to carry out weekly calibration. (v) The sound level meter shall have adequate memory to store 5 minutes equivalent

continuous readings on a 24-hour basis for up to 7 days. (vi) Dynamic range shall be at least 40dB. (c) Record of Noise Level Measurement The continuous 24-hour noise level reading shall be printed with the date and time of recording

indicated. The printout shall be submitted to the Superintending Officer's Representative on a weekly basis or at such interval as specified by the Superintending Officer's Representative. The noise level record shall be filed and kept on the Site for inspection as and when required by the Superintending Officer's Representative or ENV or NEA.

(d) Location of Sound Level Meter The Contractor shall install the Type 1 integrating sound level meter at the nearest occupied

building outside the Site. The integrating sound level meter shall be installed at a height of at least 3 metres above ground level, at a location where obstruction and other external noise interference are minimal. Where there is no suitable location outside the Site, the Contractor may place the sound level meter within the Site at a location that will register similar sound level compared to that that would be receivable at the nearest occupied building outside the Site. A temporary structure complete with access may have to be specially constructed by the Contractor for the installation of the integrating sound level meter. The location and the set up for the installation of the integrating sound level meter shall be approved by the Superintending Officer's Representative.

(e) Noise Level of Construction Equipment and Activities Noisy Construction Equipment (eg. Compressors) and installation (e.g. temporary refuse chute)

shall be sited away from the occupied residential blocks. All Construction Equipment shall be properly insulated and maintained to minimise its operating noise level. Construction Equipment generating excessive noise due to lack of maintenance shall not be used on the Site and shall be replaced within 7 days upon the instruction of the Superintending Officer's Representative.

Demo Spec Page 1-14


1.1.32 Pest Control and Surveillance The Contractor shall engage a Pest Control Operator who is; (a) registered with the BCA under the Work Head for Pest Control, & (b) NEA under the control of Vector and Pesticide Act, to provide comprehensive pest control and surveillance work on the Site commencing not later than 2

days from the commencement date of the Time for Completion stated in the Letter of Acceptance. In this respect, the Contractor shall submit the name of the Pest Control Operator together with a list its trained operatives, proof of BCA/NEA registration and NEA listing to the Superintending Officer's Representative for approval prior to carrying out the Works. The Superintending Officer's Representative may disapprove the Pest Control Operator selected by the Contractor and the Contractor shall not be entitled to any claims arising from such decision.

Pest control measures and surveillance programmes shall fully comply with the requirements of the

NEA as well as the following:

(1) The Contractor is required to submit a detailed pest control and surveillance programme inclusive of “Source Reduction Regime/Strategy”, “Water bearing receptacle removal team” at the Site to the respective NEA’s regional office and the SO Rep prior to commencement of the Works. The frequency of fogging shall be in accordance with the requirements of the NEA. Fogging is to be carried out only by licensed Pest Operator using approved chemical.

(2) The Contractor shall maintain a site register containing an up-to-date record of pest control and

surveillance work that has been carried out. The site register shall be made available and ready for inspection by the Superintending Officer's Representative when required.

(3) Submit monthly summarised returns of the site records required by NEA to the respective NEA

regional office.

The scope of work required under this Clause shall include all necessary measures to adequately and effectively prevent the Site (including vacant flats) from becoming conducive to the breeding or harbouring of vectors. The Contractor shall carry out site checks at least once a week to detect and remove breeding and harbouring grounds. If breeding or harbouring of vectors is found at the Site, enforcement action may be taken against the Contractor by the NEA. The Superintending Officer's Representative may also exercise its rights under the Nuisance & Irregularities clause by imposing charges on the Contractor.

1.1.33 Protection Of Preserved Trees From Physical Damage Unless otherwise approved by the Superintending Officer’s Representative, all existing trees on the

Site is stipulated to be preserved (hereinafter referred to as "preserved trees" for the purpose of this clause), The Contractor shall take all necessary precautions to avoid damage or injury to such trees and its roots and comply with the following requirements :

(a) All preserved trees shall be protected against damage during work operation by suitable

fencing or armouring. The protection of preserved trees shall be placed before commencing any operation/work and shall be maintained in repair for the duration of the contract unless otherwise directed. The extent of fencing shall be determined by the Superintending Officer's Representative. Fencing shall be erected all round not less than 1.2m from the trunk of preserved trees.

Individual preserved trees near heavy vehicular traffic shall be wrapped with gunny sacks and

50mm x 100mm planks worn vertically as armour around the trunk and spaced at no more than 50mm apart to a height of 1.5m above ground.

(b) Any damage to preserved tree root system shall be repaired immediately by the Contractor

under the supervision of a qualified horticulturist. Roots that are exposed and/or damaged during grading operations shall be cut off immediately and the inside of the exposed and/or damaged area cleaned; cut surfaces shall be treated with approved sealing compound and topsoil spread over the exposed root area.

Demo Spec Page 1-15


1.1.33 Protection Of Preserved Trees From Physical Damage (Cont’d) (c) Any damage to preserved tree branches shall be treated in accordance to : (i) Branch Trimming Of Damaged Branches (1) A first cutting is to be made, 300mm from the main trunk of preserved trees;

depending on the diameter of the branch being cut. The depth of the cut shall not be more than 2 of the diameter of the branch.

(2) A second cutting is to be made, parallel to the first cutting point. The distance

between these two cuttings shall be 75mm to 150mm. (3) Make a shallow cut at other side of the branch. (4) Final cut is to be sharp and clear, through the branch. (5) 2 coats of anti-fungus wound sealant are to be applied on cut area. (ii) Wound Treatment (1) Clean away ragged or loose edges of bark with a sharp pruning knife. (2) Shape the wound into an oval, pointed at both ends. (3) Coat the entire exposed surface with tree-wound paint. (d) If any preserved trees are severely injured by mechanical equipment, etc., the Superintending

Officer's Representative shall impose charges against the Contractor in accordance with “Nuisance and Irregularities” clause .

The Contractor shall ensure that the area around the preserved tree must not be waterlogged and

must be free of injurious concrete mixer waste, oil spills and the like. No dumping of excavated materials, equipment and other items are allowed around the bases of trees. The Contractor shall not park vehicle or cause compaction of soil around preserved trees. The Contractor is to comply with the Parks and Trees Act and Parks and Trees Rules and all rules made thereunder.

The Contractor shall also carry out any other routine maintenance of the preserved trees eg. branch

trimming, pesticide spraying etc. as instructed by the Superintending Officer's Representative. Should the growth of the preserved trees is stifled, the Contractor shall inter-alia bear the cost of

making good and charges in accordance with the “Nuisance and Irregularities” clause shall be imposed against the Contractor.

1.1.34 Works within Railway Protection Zone and Railway Safety Zone The Contractor shall comply with all the provisions under the latest Transport Authority (LTA) Code of

Practice for Railway Protection and the Mass Rapid Transit (Rail Protection, Restricted Activities) Regulations for Construction of the Works and other activities within the railway protection zone and railway safety zone. The Contractor shall submit proposals on effective measures for the protection of Mass Rapid Transit above ground structure together with the detail of activities of mobile cranes, tower cranes and other mechanical equipment adjacent to Mass Rapid Transit line structures to the Superintending Officer's Representative for approval at least one month prior to the use of such equipment. No jib or lifting appliance or any other moving or stationery part of the mechanical equipment shall encroach within 6m on plan from the edge of the nearest Mass Rapid Transit above-ground or at-grade structure unless the equipment is restricted to work beneath the structure. The foundation of the mechanical equipment shall be certified structurally sound and adequate by the Contractor's professional engineer prior to its installation.

Demo Spec Page 1-16


1.1.34 Works within Railway Protection Zone and Railway Safety Zone (Cont’d) Auto cut-off system shall be installed for tower cranes to prevent the top of boom to swing closer than

6m from edge of viaduct structure. The jibs of the cranes must always be pointed away from Mass Rapid Transit line structure. The temporary access shall be stable and level for machinery to move on. Regular checks shall be carried out to ensure that all mechanised equipment are in good working condition at all times. Only experienced, trained and competent operators shall be employed for mobile cranes, tower cranes and other mechanical equipment. Temporary height restriction gantry with signboard shall be installed 6m away from the edge of both sides of viaduct structure for any access passing underneath the Mass Rapid Transit line structures.

1.1.35 Cost Of Water And Electricity The Contractor shall arrange for the provision of suitable and adequate supply of water and electricity

for the Site. Where directed by the Superintending Officer's Representative, the Contractor shall provide and allow other contractors on the Site employed by the Employer, free and unrestricted use of the water and electricity for carrying out works. The Contractor shall bear all costs and expenses for the water and electricity consumed at the Site including the cost of water and electricity consumed by such other contractors employed by the Employer on the Site. Where applicable, the Superintending Officer's Representative may at his sole discretion, direct the Contractor to transfer the PUB account for the water and electricity supply to the Employer or such Town Council(s) or such other party. The Contractor shall be deemed to have included in the Contract Sum for all costs and expenses to be incurred by him for compliance with the requirements stipulated in this clause.

1.1.36 Reinstatement And Making Good To Disturbed Areas The Contractor shall exercise care in the execution of the Works to avoid damage to existing

structures, pavements and properties. The Contractor shall reinstate and make good at his own costs and expenses any damage caused by or as a result of his Works. Reinstatement and making good shall also include all fixtures, fittings and finishes which are so affected.

If it is found necessary to break up existing pavement, road or footpath, etc for purposes as required

in the Contract, such intention of doing so shall be conveyed to the Superintending Officer's Representative prior to commencement of work. If work is to be carried out on public roads, permission from LTA shall be obtained.

All affected services shall also be temporarily disconnected and/or diverted by the Contractor prior to

the commencement of Works and reinstated immediately upon Substantial Completion of the Works. The Contractor shall reinstate and make good the affected Works and services in such a manner that

upon Substantial Completion that affected works shall be in as good order and condition as they were at the commencement of the Contract.

On completion of the reinstatement, the Contractor shall maintain all the road surfaces etc., affected

during the Time for Completion and Defects Liability Period. All faults, settlements etc., developed within these periods shall be made good immediately upon receipt of an instruction from the Superintending Officer's Representative.

The Contractor shall be liable for all claims for injury or damage arising from any defect in the

reinstated road surface during the Time for Completion and Defects Liability Period. The Contractor shall be deemed to have included in the Contract Sum all costs and expenses to be

incurred by him for the reinstatement and making good of all affected works and services.

Demo Spec Page 1-17


1.1.37 Lightning Protection To Temporary Buildings And Metal Structures The Contractor shall ensure that all temporary buildings such as site office, workers' quarters, site

canteen, carpenter and bar bending sheds and temporary structures with continuous metal such as steel framework, scaffolding, tower cranes and batching plants and mobile machinery such as crawler cranes and concrete pumps are adequately and effectively protected from lightning strike at all times. The lightning protection shall be in accordance with and complying with SS CP33:1996 and/or any latest requirements by the BCD, BCA.

Notwithstanding the provisions of CP33, reinforced concrete structure and foundation shall not be

used as lightning conductors or earth electrodes. Lightning conductors shall not be embedded in any structural component and steel reinforcement shall not be used as part of the protection system.

The Contractor shall submit detailed drawings showing the design of the lightning protection

system duly signed by the Contractor's professional electrical engineer (PE) stating that the design complies with SS CP33:1996. The Contractor's professional electrical engineer shall provide a Certificate of Supervision together with the earthing reports after the lightning protection installation is completed. The Contractor's PE shall also conduct routine inspections once every 6 months to ensure that the Contractor has provided adequate and effective lightning protection system for the Site.

1.1.38 Access Roads And Protective Crossings The Contractor shall repair and maintain all access roads serving the Site and provide temporary

protective crossings over existing drains, channels, footways, etc throughout the duration of the Contract. The Contractor shall be responsible for making good all damage and/or clearing away on Substantial Completion to the requirements of the relevant Authorities and to the requirement of the Contract.

All temporary protective crossing shall be designed and certified by Contractor's PE. 1.1.39 Care Of The Works And Materials The Contractor shall be responsible for the care of the Works and the safe custody of all materials

delivered to the Site by his specialists, suppliers or sub-contractors against all risks arising from but not limited to weather, negligence, damage or loss until the Works are certified Substantially Complete by the Superintending Officer's Representative. The Contractor shall also allow for all necessary watching and security lighting.

1.1.40 Damage To Public/Private Property In the event damage is caused to public/private services or property such as cables, pipes, fittings

and fixtures etc. by the Contractor whether by accident or otherwise leading to black-outs or other nuisance or inconvenience to the public or is likely to bring the Employer into disrepute, all costs and expenses incurred for necessary reinstatement or repairs shall be recoverable by the Employer from the Contractor by deduction from monies due or becoming due to the Contractor or as a debt due by the Contractor to the Employer.

1.1.41 Treatment And Disposal Of General Waste And Debris The Contractor shall engage a licensed waste collector under the Environmental Public Health Act

(EPHA) Chapter 95, Environmental Public Health (General Waste Collection) Regulations and Environmental Health (toxic Industrial Waste) Regulations to ensure that general waste collected for disposal are disposed of properly and on a regular basis.

Before the actual start of the work, the Contractor shall plan for the movement of anticipated waste

and submit to the Superintending Officer’s Representative the name of the Waste Collector’s company and proof of the relevant valid General Waste Collector Licenses engaged to carry out waste collection at the site.

Demo Spec Page 1-18


1.1.41 Treatment And Disposal Of General Waste And Debris (Cont’d) The Contractor shall provide suitable and identifiable litterbins and bulk containers of adequate size

for separate storage of construction wastes & debris, chemical wastes, general waste and food waste in compliance with relevant ENV/NEA legislative requirements or regulations. The segregated debris and waste shall be located at designated areas within the worksite. All waste containing dangerous substances must be contained and stored separately from other waste. The food waste should be stored in covered bins or in such other manner to protect against rain and prevent rummaging by vermin or animals.

The Contractor shall declare the nature of the waste to be disposed of to the waste collector or to the

disposal facility. All debris shall be cleared from the Site at least weekly or from time to time as they accumulate or when so directed by the Superintending Officer's Representative. The Contractor shall not stockpile debris and waste in pockets within the Site.

The Contractor shall ensure that the unwanted debris, rubble or excess earth is disposed at approved

ENV/NEA dumping grounds or incineration plant only. All charges levied for the use of the dumping grounds and incineration plant shall be borne by the Contractor.

If the Contractor brings in debris, rubble or excess earth on land owned by the Employer or the

Government without written permission, he shall remove all such debris, rubble, or excess earth from such land at his own cost and expense. In addition, the Superintending Officer's Representative may also exercise his rights under the “Nuisance and Irregularities” clause.

1.1.42 Silt Control Contractor shall put in place adequate silt control measures before commencing any excavation

works to prevent the wash down of silt, earth and debris from the work site into the public drains and adjacent premises. Measures, such as construction of temporary silt traps, shall be taken to ensure that silt-laden water is not directly discharged into the public drains and to prevent any earth, top soil, cement, concrete, debris or any other material to fall or be washed into the drains from any stockpile thereof.

Exposed earth surfaces or slopes adjacent to any drain shall be closed, turfed, paved or covered at

the earliest possible time. Silt traps shall be maintained regularly and inspected immediately after a heavy downpour.

1.1.43 Cleaning Of Drains, Culverts And Footpaths The Contractor shall keep all drains, culverts and footpaths affected by this work free from

obstructions and at frequent intervals clear the drains from choke. 1.1.44 Control Of Oil/Diesel/Chemical Spillage The Contractor shall identify and designate appropriate storage area to store oil, fuel and chemical in

drums and containers, etc to contain accidental spillage and to minimise fire hazard. Containment facilities such as spillage trays shall be provide at the designated storage area to contain any leaks and prevent contamination of land and water. Appropriate type of fire extinguisher shall be provided on standby. Such an area shall not have any outlet/opening leading to a storm water drain or sewer.

The Contractor shall provide full containment facilities such as bundwall for the bulk diesel

tanks/drums, including skid tanks at designated locations, in accordance to ENV/NEA regulations. The containment facility shall consist of a bund wall built round the tank and be lined with sand to absorb any spillages and leakages. The contaminated sand shall be collected and sent to a licensed toxic waste collector for proper disposal. Such an area shall not have any outlet/opening leading to a storm water drain or sewer. Appropriate type of fire extinguisher shall be provided on standby.

Any repair or servicing of vehicle that requires waste oil to be disposed of should only be carried out if

there are facilities to contain the waste oil and to prevent contamination of land and water.

Demo Spec Page 1-19


1.1.45 Cleaning Of Public And HDB Maintained Roads The Contractor shall ensure that all vehicles used by him, his servants or agents, or by his sub-

contractors or suppliers, their servants or agents (hereinafter referred to as "the Contractor's vehicles") shall not dirty any public or HDB maintained roads. In this respect, it is the Contractor's responsibility to ensure that all such vehicles are properly cleaned before they move onto these roads.

The Contractor shall check with the Superintending Officer's Representative if he is in doubt whether

any road is a public or HDB maintained road and the decision of the Superintending Officer in this respect shall be final and binding on and conclusive against the Contractor.

In the event the Site abuts a public or HDB maintained road and the Contractor's vehicles use the

road for site access, the Contractor shall provide a washing bay to wash and clean his vehicles before they move onto the public or HDB maintained road. If vehicles of other contractors also use such public or HDB maintained road for site access, the Contractor shall provide similar washing and cleaning facilities for these vehicles before they move onto the public or HDB maintained road. The Contractor shall also provide the same facilities for similar purposes in the event a road abutting the Site becomes a public or HDB maintained road and is used for site access by the Contractor or other contractors.

The Contractor shall implement water conservation programme to recycle the water used at the

washing bay. 1.1.46 Cleaning Up On Substantial Completion The Contractor shall on Substantial Completion of the Works, remove all rubbish, Construction

Equipment and surplus materials. The Site and periphery shall be cleared of all rubbish left from the Contractor's work.

1.1.47 Completion Of Site Works The Contractor shall take note that Site Works are phased together with the demolition work as a

single phase of the Works. Site Works refer to all site structures/facilities, such as, but not limited to, hard courts/footpaths etc., and landscaping works, such as earth mound formation, turfing, trees and shrubs planting etc., where included in the Works

It is essential to the Employer for the Site Works and the demolition work to be completed and handed

over to the Employer as single phase. In the event the Contractor fails to substantially complete the Site Works and the building block as one phase within or by the Time for Completion or any subsequent extension of time approved by the Superintending Officer, the rate of liquidated damages for the whole phase as stipulated in the Appendix shall be imposed for every day the Works for the phase so remains incomplete.

1.1.48 Handing Over Of Completed Works And Certification Of Substantial Completion (a) The Works can be considered as substantially completed only upon successful hand over of

the Works to the Employer after inspection by the Superintending Officer's Representative. (b) The Contractor shall conduct thorough inspections of the Works to ensure that all Defect are

rectified and the Works have been completed to fully meet the requirements of the Contract before the handing over inspection by the Superintending Officer's Representative.

(c) The Contractor shall notify the Superintending Officer's Representative in writing at least seven

(7) days in advance to request for a handing over inspection. (d) If the Works are considered to have met the requirements of the Contract including the

approved workmanship standards and there is no major Defect detected during the joint handing over inspection, the Works shall then be taken over by the Employer. Otherwise, the Superintending Officer's Representative shall give the Contractor a list of outstanding Defect for rectification. The Contractor shall proceed to rectify the Defect with due diligence and expedition and without delay. Upon completion of the Defect rectification, the Contractor shall notify the Superintending Officer's Representative in writing that all outstanding Defect found in the first inspection have been rectified and to request for a second handing over inspection. The provision of the preceding subclause (c) above shall apply, mutatis mutandis.

Demo Spec Page 1-20


1.1.48 Handing Over Of Completed Works And Certification Of Substantial Completion (Cont’d)

(e) If the Contractor is unable to hand over the Works to the Employer after two handing over inspections, the Employer may take appropriate actions against the Contractor. In addition, the Superintending Officer's Representative may also exercise his rights under the “Nuisance and Irregularities” clause.

1.1.49 Time Required For Contractor For Preparation Of Handing Over Inspection The Contractor shall complete the Works or any phase or sub-phase thereof as set out in the Letter of

Acceptance in accordance to the Time for Completion or any subsequent extensions of time approved by the Superintending Officer.

All completed Works or any phase or sub-phase thereof shall be handed over to the Employer within

or by the Time for Completion or any subsequent extensions of time approved by the Superintending Officer, prior to the issue of any Certificate of Substantial Completion.

The Contractor shall note that the Time for Completion has been computed to include the time

allowed for preparation of handing over inspections. Therefore, the duration required for the preparation of and the handing over inspections shall be incorporated into the Programme for the Works or revised Programme, if any, which is required to be submitted to the Superintending Officer's Representative for approval, as required under the Contract.

1.1.50 Rectification Of Defects After Certification of Substantial Completion The Contractor shall within fourteen (14) working days from the date of written notification by the

Superintending Officer's Representative at the Contractor's own cost and expense, repair, rectify and make good all Defects arising from or out of the use of materials or workmanship not in accordance with the Contract or from neglect or failure of the Contractor to comply with any obligation on his part under the Contract which may become manifest.

If the Contractor fails to carry out his obligations as aforesaid, the Superintending Officer's

Representative may exercise its right under the Nuisance and Irregularities clause to impose a charge on the Contractor.

Without prejudice to the foregoing provisions, the Employer shall have the right to engage other

person(s) or contractor(s) to repair, rectify and make good all such Defects if the same are not repaired, rectified and made good after fourteen (14) working days from the date of written notification by the Superintending Officer's Representative, and the cost and expense incurred shall be recovered from the Contractor. In addition, the Superintending Officer's Representative shall exercise its rights under the Nuisance and Irregularities clause to impose a charge on the Contractor.

1.1.51 Nuisance And Irregularities If the Contractor is found to have committed any of the following irregularities : (i) Omitting building materials or labour, reducing the sizes of the materials, using inferior

materials; or materials constructed not according to the Specifications or Drawings; (ii) Creating nuisance at the site thereby causing inconvenience to the Superintending Officer's

Representative or the public or committing similar acts (such as not complying with site safety requirements etc) which are likely to bring the Employer into disrepute;

(iii) Non-compliance with any part of the Specifications or Drawings, or non-fulfilment of any

contractual obligations; the Superintending Officer's Representative reserves the right to impose on the Contractor, and the

Contractor, and the Contractor hereby fully accepts and agrees to pay without dispute or question, a charge based on prevailing guidelines set by the Employer but not exceeding $100,000.00, and for contract with a contract sum of less than $300,000.00 a charge not exceeding 30% of the contract sum, per occasion as agreed compensation to the Employer for the inconvenience caused, investigations and administrative expenses incurred by the Employer and for damage to the Employer's reputation and standing generally. Furthermore, the Contractor may be debarred from tendering for a specified period.

Demo Spec Page 1-21


1.1.51 Nuisance And Irregularities (Cont’d) In addition to the above charges, the Superintending Officer's Representative or HDB is empowered

either : (a) To order any irregular work to be removed and made good in accordance with the Contract at

the Contractor's expense. or (b) In lieu of correcting work not done in accordance with the Contract, the Superintending

Officer's Representative or HDB may allow such work to remain and shall recover any cost differences between the specified requirements and the non-compliance.

For nuisance committed on site, the Contractor must take immediate action to cease the nuisance

committed upon instruction given by the Superintending Officer's Representative or the HDB. 1.1.52 TRADE SUBCONTRACTORS

The Contractor, with the exception of his own direct employed workers, shall engage only BCA registered contractors or corporations/firms listed in the HDB Materials List for executing the Works for the following trades :

(1) Timber formwork; (2) Metal formwork; (3) Steel reinforcement work; (4) Structural steel fitting; (5) Concreting; (6) Bricklaying; (7) Joinery; (8) Painting; (9) Plastering; (10) Roofing; (11) Tiling; (12) Electrical engineering; (13) Air-conditioning, refrigeration & ventilation works; (14) Plumbing & sanitary and gas piping; (15) Fire protection; (16) Waterproofing; (17) Piling; (18) Concrete repairs; (19) Metal work; (20) Cable installation & road reinstatement; (21) Drain laying/Pavement & kerb construction; (22) Curtain Wall/Cladding; (23) Metal scaffolding (Erectors);

At least 14 days before the commencement of the Works by the subcontractors for the respective trades, the Contractor shall submit the name of his subcontractors for the Works to the SO Rep. Where the Contractor changes his subcontractor, he shall also submit such information to the SO Rep.

For the purposes of this clause, the relevant BCA register and HDB Materials List shall be those applicable at the commencement of work for the respective trades.

The Contractor shall be responsible for any eventual delay in the progress of the Works owing to his failure to ensure the required on-time registration of his subcontractors and no extension to the Time for Completion shall be granted on account of such delays.

Demo Spec Page 1-22


1.2 MATERIALS - GENERAL 1.2.1 Metric Components All components for incorporation into the Works shall be in metric units. However, when metric

components are not available, their equivalent in imperial units may, subject to the approval of the Superintending Officer's Representative, be used and such substitution shall not constitute a variation to the Contract.

1.2.2 Materials And Workmanship When directed, furnish the Superintending Officer's Representative with approved documents to

prove that materials are as specified. The documents shall include but not limited to any or all of the following, such that the authenticity of the materials can be easily ascertained :

(a) shipping documents (b) serial numbers (c) warranty certificates In the event that any documents submitted are not original copies, they shall be duly certified by the

originating parties. No information within the documents shall be tampered with, unless it is clearly discernible that the items are not related to the materials specified in the Contract.

Where specific brand and model number are specified, or where alternative brands and model

numbers are offered by the Contractor and accepted by the Superintending Officer's Representative, it shall be deemed that the finished products are entirely of original make by the registered Manufacturer and are fully supported by the Manufacturer's warranty. In the event that any alteration is made to the goods by a local agent or any other intermediary, the approval of the Superintending Officer's Representative shall be sought and the result of the alteration shall be fully supported by the Manufacturer such that the Manufacturer's warranty is maintained.

All references to local or foreign standards and/or Codes of Practice shall be deemed to be inclusive

of the prevailing amendments to these standards and/or Codes of Practice. Samples of materials shall be submitted to the Superintending Officer's Representative for approval

before order is placed with the supplier. Such approval by the SO Rep shall not relieve the Contractor of its obligations under the Contract.

The Contractor shall ensure that the materials are free from any defects, damages or any other flaws. 1.2.3 Approval Of Samples And Trade Names Where trade names or catalogue numbers are specified in the Specifications and/or shown in the

Drawings, they are intended only to serve as a guide to the respective type and quality of material required. Other material proposed by the Contractor may be used subject to the prior approval of the Superintending Officer's Representative. In this respect, the Contractor shall submit samples of the proposed material to the Superintending Officer's Representative for approval.

When a sample is approved by the Superintending Officer's Representative and subsequently work is

carried out in accordance with this approved sample, any cost difference resulting from the higher price of the approved sample as compared with the price of the material as required and/or as shown shall not be payable to the Contractor, unless the change of material is ordered by the Superintending Officer's Representative. With the exception of lighting luminares, where the requirements for cost recovery are provided for differently, in the event that the price of the approved sample is lower than that of the material as required and/or as shown, the cost difference shall be recovered by the Employer by way of contract variation in accordance with the following table :

Demo Spec Page 1-23


1.2.3 Approval Of Samples And Trade Names (Cont'd)

Recovery (or Non-Recovery) by the Employer from the Contractor in the event that the price of the approved material is lower than that of the material as required and/or as shown

S/N Material as required and/or as shown

Alternative material proposed by the Contractor and approved by the Superintending Officer's

Representative

Cost Adjustment

1.

On the HDB Materials List On the HDB Materials List No cost recovery

2.

On the HDB Materials List Not On the HDB Materials List ) ) ) ) Cost Recovery ) by the Employer ) from the ) Contractor ) ) )

3.

Not On the HDB Materials List

On the HDB Materials List

4.

Not On the HDB Materials List Not On the HDB Materials List

For lighting luminaires, in the event that the price of the approved sample is lower than that of the

material as required and/or as shown, the cost difference shall be recovered by the Employer by way of contract variation regardless of whether or not the approved sample and/or the material as required and/or as shown are shown in the HDB Materials List.

For the purposes of this subclause only, the applicable HDB Materials List shall be the prevailing HDB

Materials List applicable at the time the Contractor submit the material for approval by the Superintending Officer's Representative.

Where cost recovery is required, the basis for such adjustment shall be the difference between the

price of the proposed material and that of the material as required and/or as shown (where one type of material is specified) or that of the cheapest of the materials as required and/or as shown (where more than one type of material is specified).

The Contractor shall point out to the Superintending Officer's Representative all items in the approved

sample which do not comply with the Specifications and/or Drawings. Notwithstanding approval of the sample by the Superintending Officer's Representative, the

Contractor shall be liable for any items in the sample which do not comply with the Specifications and/or Drawings and which the Contractor has failed to point out to the Superintending Officer's Representative.

Where the Contract requires the Contractor to obtain materials from the HDB Materials List or where it

is specified that materials provided are subject to the approval of the Superintending Officer's Representative, such requirements shall not in any way affect, vary or relieve the Contractor's obligations under the Contract.

The Contractor shall ensure that the materials used or selected by them:

(a) are free from defects, damages or faults; (b) are of merchantable quality and fit for their intended purpose; and

(c) comply with the Specifications and/or Drawings. 1.2.4 PSB Quality Certificates Where two or more materials are proposed by the Contractor under subclause 1.2.3 "Approval Of

Samples And Trade Names", the Superintending Officer's Representative may at his sole discretion give preference to the use of a material that is approved under any of the PSB quality certification schemes.

Demo Spec Page 1-24


1.2.5 Samples Samples of materials specified and proposed to be provided shall be submitted for the approval of the

Superintending Officer's Representative as required. The Superintending Officer's Representative shall retain samples as and when approved by him and shall be at liberty to reject all materials not corresponding with the approved samples.

1.2.6 Precautions Against Materials Being Taken Out Of Site The Contractor shall be responsible for the safe custody of all materials delivered to the Site and

ensure adequate protection and prevention of such materials from being taken out of the Site. The Superintending Officer's Representative will not accept any excuse for materials taken out of the Site by the Contractor, his foreman or other individual even without the knowledge of the Contractor who shall be deemed to have provided for proper control against such malpractice.

1.2.7 Approval For Use Of Ready-Mixed Concrete The Contractor shall seek the written approval of the Superintending Officer's Representative for the

use of ready-mixed concrete. Such approval to use ready-mixed concrete shall be subject to the terms and conditions set by the Employer and all Delivery Orders for the ready-mixed concrete delivered to the Site shall be endorsed and submitted to the Superintending Officer's Representative.

Demo Spec Page 1-25


1.3 LABOUR 1.3.1 Labour Laws The Contractor shall pay his workmen promptly and observe workmen's working hours and holidays

in accordance with current laws and regulations. He shall keep records and produce them for inspection by the Superintending Officer's Representative.

1.3.2 Keeping Records Of Workmen The Contractor shall comply with all labour laws regarding the engagement of non-citizen workmen.

Work Permits shall be obtained from MOM for these workmen. The Contractor shall be held solely liable for and shall indemnify the Employer in respect of all actions against the Employer for employing foreign workmen without permits.

The Contractor shall keep proper records of all workmen engaged on site. These records shall

include the following information : (a) Name of Workmen (and alias if any) (b) Identity Card No./Passport No. (c) Address (d) Work Permit No., if any (e) Expiry date of work permit This information must be recorded before any workman is allowed to commence duty. Severe action

will be taken by the Superintending Officer's Representative if the Contractor fails to record any of the abovementioned information of any worker found at the site.

1.3.3 Training For Singapore Civil Defence Force And Other Government Authorities The Contractor shall provide all access, attendance and assistance for the conducting of training,

testing and exercise by personnel from the Singapore Civil Defence Force and other relevant Authorities for a period of up to 2 weeks at the Site during normal working hours from 8.00 am to 6.00 pm.

The Contractor is not required to pay the wages and allowances for such attached personnel. The

Contractor shall also provide all necessary safety equipment required to be used by such attached personnel.

The Contractor shall be deemed to have included in the Contract Sum all costs and expenses to be

incurred by him for compliance with the requirements stipulated in this clause including any acceleration, dislocation or delay to the Works arising from the conducting of training, testing and exercise by such attached personnel.

If the period allocated for such training, testing and exercises is less than 2 weeks, there shall be no

cost recovery from the Contractor. All differences and/or disputes arising under this clause (including questions relating to interpretation)

shall be determined by the Superintending Officer's Representative whose decision shall be final and binding on and conclusive against the Contractor.

1.3.4 Employment Of Illegal Immigrants For the purpose of this Clause "Illegal Immigrants" shall refer to any person who enters the Republic

of Singapore in contravention of the provisions of the Immigration Act or any statutory modification or re-enactment thereof.

The Contractor shall ascertain the legitimacy of all Foreign Workers employed by him and/or

any sub-contractor prior to employment and throughout the duration of the Works. Clarification as to the legitimacy of Foreign Workers may be made with the Immigration Authority, the Ministry of Manpower and/or the Police.

The Contractor shall ensure that no illegal immigrants are employed by him and/or any sub-contractor

in the execution of the Works. The Employer shall not be responsible for any such act or acts by the Contractor and/or any of his sub-contractors and the Contractor shall indemnify the Employer for all consequences arising thereof.

Demo Spec Page 1-26


1.3.5 Engagement Of Professional Engineers The Contractor shall engage one or more engineers with recognised and approved engineering

degrees, registered with the Professional Engineers' Board, to supervise the works throughout the duration of the contract. The said engineers shall be expected to take all reasonable steps and exercise diligence in providing immediate supervision and inspection to ensure that the demolition works are being carried out with a high standard of safety.

The Contractor shall be deemed to have included in the Contract Sum all costs and expenses to be

incurred by him for compliance with the requirement stipulated in this clause. Upon award of the contract, the Contractor shall submit the names, identity card numbers and

qualifications of the said engineer(s) in the form of a Statement of Undertaking to be countersigned by the engineer(s) himself. A specimen of the Statement of Undertaking is as shown in Appendix I .

In the event whereby the Contractor wishes to terminate the engagement of the said engineer(s), he

shall submit his request in writing at least 7 days before the date of termination, to re-engage another engineer in replacement. The Contractor shall submit together with his request the Statement of Undertaking in the same form as before to be countersigned by the newly engaged engineer(s).

The engagement of the engineer(s) shall be subjected to the approval of the Superintending Officer's

Representative. It shall be the Contractor's duty to bring to the attention of the engineer(s) the contents of this clause. In the event of the Contractor not engaging the engineer(s) required by the Contract for the period

required by the Contract, without prejudice to the Employer's right under the Contract, the Contractor shall not be allowed to execute demolition work until such time when the requirement of this clause has been fully complied with.

Notwithstanding the above, the Employer shall at its absolute discretion exercise its rights under the

Nuisance and Irregularities clause to impose charges against the Contractor. 1.3.6 Employment Of Contractor's Site Personnel The Contractor shall employ all the site personnel and station them full-time on the Site throughout

the Time for Completion and any time period where liquidated damages are imposed under the Contract all as specified hereunder :

Type of Personnel

Fully Agreed & Accepted Rate by the Contractor & the Employer for the Cost & Expense Deemed

to be Allowed by the Contractor for the Employment of Each Personnel

Project Manager $8,600 per Project Manager per month Workplace Safety & Health Co-ordinator

$4,500 per Workplace Safety & Health Co-ordinator per month

Site Supervisor for Structural Works $4,000 per Site Supervisor per month

Security Guard $2,000 per Security Guard per month (A) Qualifications/Experience/Responsibilities Of Site Personnel (i) Project Manager The Contractor's Project Manager shall be qualified, competent and possess the skill,

knowledge and ability to manage and co-ordinate the project effectively. The Project Manager shall be the Contractor's Representative as required under the Contract.

Demo Spec Page 1-27


1.3.6 Employment Of Contractor's Site Personnel (Cont’d)

(A) Qualifications/Experience/Responsibilities Of Site Personnel (Cont’d) (i) Project Manager (Cont’d)

The Project Manager shall possess the following minimum academic qualifications and experiences:

(a) For Contract Sum $50 million and above, the candidate shall have a Degree in

Architecture, Civil / Structural / Electrical / Mechnical Engineering, Building Science or Quantity Surveying with 5 years of relevant post-graduate working experience in the building construction industry or 3 years of relevant post-graduate project management experience in high rise buildings. The degree shall be recognized either by the respective Professional Bodies, professional institutions or Building and Construction Authority.

(b) For Contract Sum less than $50 million, the candidate shall have: A degree in Architecture, Civil / Structural / Electrical / Mechanical Engineering,

Building Science or Quantity Surveying with 5 years of relevant post-graduate working experience in the building construction industry or 3 years of relevant post-graduate project management experience in high rise buildings. The degree shall be recognized by the respective Professional Bodies professional institutions or Building and Construction Authority; or

A diploma in Civil / Structural / Mechanical / Electrical Engineering, Building

Science, Building Management, Building Services Engineering and at least 10 years of relevant working experience in the building construction industry. The working experience should preferable be working on past HDB projects and shall be recognised by HDB as relevant working experience.

(ii) Workplace Safety & Health Co- Ordinator The Contractor's Safety & Health Co- Ordinator shall possess recognised and approved

certification in construction safety to take charge of all matters related to safety. The said Safety Supervisors shall spend their time fully performing the following :

(a) To supervise safety and promote safety conduct; (b) To inspect and rectify any unsafe place of work; (c) To correct any unsafe practice; and (d) To ensure that the provisions of the Workplace Safety & Health Act Act and its

Subsidiary Legislation made thereunder are complied with. In the event that the Contractor is required to employ a full-time Workplace Safety &

Health Officer to comply with the requirements under the Workplace Safety & Health (WSH Officers) Regulations or as required under the Contract, such Workplace Safety & Health Officer employed by the Contractor shall also be deemed to be one of the Workplace Safety & Health Co-ordinators employed by the Contractor in compliance with the foregoing requirements.

Demo Spec Page 1-28


1.3.6 Employment Of Contractor's Site Personnel (Cont’d)

(A) Qualifications/Experience/Responsibilities Of Site Personnel (Cont’d)

(iii) Site Supervisors The Contractor's Site Supervisors shall be qualified and competent and possess the

relevant skills, knowledge and the ability to supervise and co-ordinate the Works; and with the following academic qualifications and experience :

(a) Possess a National Certificate in Construction Supervision (NCCS) or at least 5

years of similar capacity relevant working experience in the building construction industry; or

(b) Possess a recognised Diploma in Civil/Structural Engineering, Building Science,

Building Management, Building Services Engineering and at least 3 years of relevant working experience in the building construction industry; or

(c) Possess a Degree (foreign university) in Civil/Structural Engineering and at least

2 years of relevant working experience in the local building construction industry. (iv) Security Guards (a) The Contractor shall employ Security Guards from agencies that are

certified/accredited to the Association of Certified Security Agencies (ACSA) or the Security Association Singapore (SAS). A listing of these certified/accredited security agencies may be obtained from the Licensing Division of the Singapore Police Force. The Contractor shall inform the Superintending Officer's Representative in writing on the security agency who supplied the Security Guards, within two weeks from the commencement date of the Time for Completion.

(b) All Security Guards shall at all times be in proper uniform of their security agency

with their names and identification tags on. Essential security enforcement equipment such as whistle, torchlight, handphone, walkie-talkie etc shall be provided to them. They shall respond within five to ten minutes whenever they are called either through a handphone or walkie-talkie. The Security Guards must not be armed with weapons that are disallowed by the Singapore Police Force.

(c) A proper guard post with adequate security lighting and communication facilities

shall be erected at the entrance to the Site. All temporary gates/openings along the fencing/hoarding shall be guarded by a Security Guard during normal working hours and locked up after normal working hours.

(d) The Security Guards shall be responsible for the general security of the Site and

shall ensure that unauthorized personnel and vehicles do not entered the Site during and after normal working hours.

(e) The Security Guards shall be employed to perform site security duties on a 24

hour basis. A minimum of one (1) Security Guard shall be on duty at any one shift including Sundays and public holidays throughout the Time for Completion and any time period where liquidated damages are imposed under the Contract. No Security Guard shall leave the Site until he is properly relieved by a replacement, even if his shift has ended.

(f) A proper record of the Security Guards' attendance must be kept and made

available to the Superintending Officer's Representative upon request.

Demo Spec Page 1-29


1.3.6 Employment Of Contractor's Site Personnel (Cont'd) (B) Replacement Of Site Personnel The Superintending Officer's Representative shall be empowered to instruct the Contractor for

a replacement at the Contractor's own costs and expenses if any of the site personnel is found not carrying his duties to the satisfaction of the SO Rep.

(C) Compliance With Requirements And Submission Of Information Of Site Personnel (i) The Contractor shall submit to the Superintending Officer's Representative within 21

days from the date of the Letter of Acceptance, the name, identity card numbers and documentary evidence of the educational qualifications and experience of all the site personnel employed by the Contractor. The employment of the site personnel shall be subject to the approval of the Superintending Officer's Representative.

(ii) In addition, the Contractor shall comply with the requirements and keep records and

submit these information to the Superintending Officer's Representative where required by him as specified below :

(a) Except for the security guards and safety supervisors, all the site personnel

employed shall be on the Contractor's monthly payroll. The Contractor shall keep records indicating the number of days the site personnel are employed for each month and the monthly contributions to CPF. Such information may be proof of employment of the site personnel.

(b) A letter from the Contractor to testify that all the site personnel are deployed to

work full-time for this Site only; (c) Further to (b) above, if any site personnel is found to be working in more than

one running site, the Contractor shall deemed to have contravene the requirement of this clause. Without prejudice to the Employer’s reserved rights to instruct the Contractor for a replacement at the Contractor's own costs and expenses, the Superintending Officer’s Representative may at its absolute discretion exercise its rights under the Nuisance and Irregularities clause to impose a charge on the Contractor.

(d) Contractor shall maintain on site a daily attendance record of all the full-time site

personnel specified herein to be submitted by the Contractor on a monthly basis or as and when requested by the Superintending Officer’s Representative.

(D) Inclusion Of Cost And Failure To Employ The Site Personnel (i) The Contractor shall be deemed to have included in the Contract Sum for all costs and

expenses to be incurred by him for compliance with the requirements stipulated in this subclause.

(ii) In the event of the Contractor not employing the number of site personnel, required by

the Contract or not employing such site personnel for the period or periods required by the Contract, without prejudice to the Employer's rights under the Contract, the Contractor shall be indebted to the Employer at the rate or rates as specified for each of the respective site personnel per month and such indebtedness shall be deducted by the Employer from any monies due or becoming due to the Contractor or be recovered by the Employer as a debt due from the Contractor. These rate or rates shall be deemed to have been fully agreed and accepted by the Contractor and the Employer as the costs and expenses allowed by the Contractor for the employment of each of the respective site personnel for each month. For the purpose of this subclause, each of the site personnel shall be employed by the Contractor for at least 20 days within a calendar month before he can be considered as being employed for that particular month under the Contract. In the event that the first and/or the last calendar month of the Time for Completion or any time period where liquidated damages are imposed under the Contract, have less than 20 days, each of the site personnel shall be employed for the full number of days in the said first and last calendar month of the Time for Completion or any time period where liquidated damages are imposed under the Contract.

Demo Spec Page 1-30


1.3.6 Employment Of Contractor's Site Personnel (Cont'd) (D) Inclusion Of Cost And Failure To Employ The Site Personnel (Cont’d)

(iii) Notwithstanding other provisions in this subclause, if the Contractor incurs additional costs and expenses over and above the agreed rates specified herein in complying with the requirements stipulated in this subclause, the Contractor alone shall bear such additional costs and expenses in full.

(E) Application For Release Of Site Personnel The Superintending Officer's Representative may consider a request by the Contractor in

writing to release any of his site personnel from the obligations of this subclause if the physical demolition works has been completed. It shall be up to the absolute discretion of the SO Rep to decide whether the Contractor's site personnel can be released and the number of site personnel to be released as provided for under this subclause. A written approval from the SO Rep shall be obtained in this respect.

(F) Superintending Officer's Decision All differences and/or disputes arising under this subclause (including questions relating to

interpretation) shall be determined by the Superintending Officer whose decision shall be final and binding on and conclusive against the Contractor.

Demo Spec Page 1-31


1.4 SAFETY 1.4.1 Site Safety Measures The Contractor shall allow for the compliance with the Workplace Safety And Health Act (hereafter

referred to as the “the Act” for the purposes of this clause including all subclauses under it) and its Subsidiary Legislations including the provisions of the Workplace Safety and Health (Construction) Regulations (hereafter referred to as the “the Regulations” for the purposes of this clause including all subclauses under it) and any amendment or re-enactment thereto.

The subsidiary legislation are:- a) The Workplace Safety and Health (General Provisions) Regulations b) The Workplace Safety and Health (Registration of Factories) Regulations c) The Workplace Safety and Health (First-Aid) Regulations d) The Workplace Safety and Health (Exemption) Order e) The Workplace Safety and Health (Composition of Offences) Regulations f) The Workplace Safety and Health (Incident Reporting) Regulations g) The Workplace Safety and Health (Risk Management) Regulations Precedent to the commencement of the Works, the Contractor shall first obtain a Certificate Of

registration, under the act subsidiary legislations, The Workplace Safety And Health (Registration Of Factories) Regulations.

It shall be the duty of the Contractor to comply with all such requirements of the Act and its Subsidiary

Legislation, as affect him or any person or persons employed by him, and as related to any work, act or operation performed or about to be performed by him. The Contractor shall not permit any person to do anything not in accordance with the generally accepted principles of safe and sound practice.

The Contractor shall ensure a safe environment on the Site at all times. All safety provisions shall be

properly maintained and shall not be removed without the written approval of the SO Rep. The Contractor shall ensure that necessary and sufficient precautions are taken by his workmen when safety provisions are used. The Contractor shall not allow any of the safety provisions to be used unless he has satisfied himself that the provisions are safe. The Contractor shall submit a safety programme to the SO Rep within 14 days from the date of the Letter of Acceptance for approval prior to the commencement of the Works.

The Contractor shall submit the following to the SO Rep within 14 days from the date of the Letter of

Acceptance for approval prior to the commencement of the Works. The submissions of safety programme shall comply with and kept in the site office and made available

for reference at all times. The Contractor shall display safety posters at the site office, exit/entry points of buildings and passenger

cum material hoist area.

Demo Spec Page 1-32


1.4.1 Site Safety Measures (Cont’d) The Contractor shall submit drawings, detailings and calculation for all temporary structures as required,

certified by his Professional Engineer (hereinafter referred to as "PE" for the purpose of this Clause), for approval at least one week before the commencement of the Works unless otherwise specified. The approval of the SO Rep shall not relieve the Contractor and his PE of the need to ensure the adequacy and sufficiency of the safety provisions.

The Contractor is deemed to have allowed in the Contract Sum for all cost and expense for the safety

provisions and for all additional costs that may arise from amendments to the Act and its Subsidiary Legislation or changes in the requirements of MOM and the HDB.

(a) Personal Protective Equipment

The Contractor shall provide and maintain suitable personal protective equipment to all workmen employed on the Site. The Contractor shall ensure that such personal protective equipment comply with the requirements of the Regulations. The Contractor shall also ensure that all equipment are properly used by his workmen during the course of their work. The Contractor shall record the issuance of all equipment to his workmen. The forms shall be kept in the site office and made available for inspection at all times. The colour code of safety helmets provided by the Contractor shall comply with the requirements of the Regulations.

(b) Protection Of Persons, Existing Structures, Services And Properties

Where there is a danger of persons or property being struck by falling materials or debris, fans or catch platforms should be designed by the contractor's professional engineer shall be provided.

Where any asbestos material is involved in the demolition work, clearance from Ministry of Manpower must be obtained and the correct protective clothing and methods must be used.

The Contractor shall provide all necessary barricadings, hoardings shorings and other measures to protect existing structures services and occupants' properties on site against all risk of damage or loss. Such protective measures shall be provided where the risk of damage or loss can be reasonably expected or where directed by the SO Rep. The costs of providing the protective measures shall be deemed included in the Contractor's Contract Sum.

The Contractor shall be responsible for any damage or loss to existing structures, services and occupants' properties from whatsoever cause arising directly or indirectly out of in relation to or in connection with the Works. Where external walls, doors, windows and any other external elements of each flat, switchrooms, pumprooms etc are affected by the Works, the Contractor shall provide adequate security measures to safeguard properties, equipment etc. within the said flats or rooms. The Contractor shall also provide all necessary measures to protect from damage all fittings and fixtures within flats or equipment within the switchrooms, pumprooms etc. The Contractor shall ensure that such protection and security measures do not damage the existing structures or elements to which the measures are fixed or attached. Upon completion of the works within the flats, pumprooms/switchrooms etc., the Contractor shall remove all the protection and security measures and reinstate or make good the affected existing structures or elements to their original condition. The Contractor shall submit all details of the protection and security measures to the SO Rep for written approval before erection of such measures. The approval of the SO Rep shall not in any way affect the Contractor's liabilities or obligations under the Contract.

In the event of damage or loss to existing structures, services or occupants' properties, the Contractor shall within seven (7) working days from the date of written notification by the Employer at the Contractor's own cost repair, rectify and make good or replace to the satisfaction of the Employer all or such damage or loss.

Demo Spec Page 1-33


1.4.1 Site Safety Measures (Cont’d)

(b) Protection Of Persons, Existing Structures, Services And Properties (Cont’d)

If the Contractor fails to repair, rectify and make good or replace all the damage or loss as aforesaid, the Employer may exercise its rights under the Nuisance and Irregularities clause and impose charges against the Contractor for such damage or loss as aforesaid until the same are repaired, rectified and made good or replaced all to the satisfaction of the Employer. Without prejudice to the aforesaid, the Employer shall have the right to engage other person(s) or contractor(s) to repair rectify and make good or replaced all such damage or loss if the same are not repaired, rectified and make good or replaced after seven (7) working days from the date of written notification by the Employer, and the cost of repair, rectification and making good or replacement of the same shall be recovered from the Contractor. In addition, the Employer may exercise its rights under the Nuisance and Irregularities clause to impose charges against the Contractor. The aforesaid cost recovery and imposition of charges shall be deducted from any monies due or becoming due to the Contractor or recovered as a debt due by the Contractor to the Employer.

(c) Access And Working Places

There shall be provided, at all times, safe access to and egress from all working places. Entrances, passageways, stairs and ladder runs shall be kept clear of material and debris, and where necessary, be so protected as to safeguard any person using them from falling material. Once disturbed, staircase cannot be regarded as safe access and shall not be used. Workers shall not be permitted to use accumulated debris or piled materials as a footing for the performance of their work. Every worker shall be provided with safe footing in the form of sound planking or flooring. Access to areas where flooring has been removed, or where there are dangerous holes or openings such as lift shafts, shall be barred or protected with guard rails and toe boards. If work cannot safely be done from the ground, or from a sound part of the building or structure, other safe means of support shall be provided.

All openings and edges from or through which a person could fall a distance of more than 3m shall be securely covered or provided with guard rails and toe boards. Materials used to cover holes shall be securely fixed in position. Where such measures are impracticable, safety nets or sheets shall be provided below the openings. Where nets are impracticable safety belts shall be provided. Nails must be removed or knocked down, or the timber stacked where it would not be a source of danger.

Glass in windows, partitions, roofs etc. shall be removed prior to structural demolition. Care must be taken to ensure that glass is completely removed and broken pieces are not left where they could cause injury.

Adequate and suitable lighting shall be provided for all working places, approaches, dangerous openings and places where lifting or lowering is taking place.

Dust shall be reduced by wetting the structure with water before the demolition starts and during actual demolition works.

Demo Spec Page 1-34


1.4.1 Site Safety Measures (Cont’d) (d) Removal Of Debris Every opening used for the removal of materials or debris on every floor shall be provided with

an enclosure or chute. Openings in the top or working floor shall be protected on all sides. Where there is a hazard from debris falling on to a floor or on to the ground, barricades or

guard rails to prevent access shall be erected at least 6m from the danger area or at least half the height from which the debris is dropped whichever is the greater.

Materials and debris shall not be stored on fans, catch platforms, scaffold platforms, floors, or

stairways of the building structure being demolished. The floor of a building or structure may however be used for temporary storage when it has sufficient strength to support safely the load imposed.

Storage spaces shall not interfere with access to any stairway or passageway, and suitable

barricades shall be provided so as to prevent material sliding or rebounding into any space used by workers or members of the public. All materials shall be safely piled in such locations as will not interfere with any operations, nor present a hazard to anyone on the demolition site.

Debris shall not be piled against walls or in confirmed spaces such as the inside of a lift shaft. A look-out man should be posted where there is a danger from flying debris. (e) Erection And Removal Of Temporary Hoarding Unless otherwise specified, the Contractor shall provide, erect and maintain a continuous

hoarding around the entire contract boundary before the commencement of the works. The hoarding shall be erected at not less than 300mm away from any permanent structure such as footway, drain, pipeline, etc. The types of hoardings to be erected shall depend on the building locality and the demolition zone. In general, the categories of hoardings shall be as follows :

(i) Category A : Protective hoarding for use where footway is needed; (ii) Category B : Protective hoarding for use where footway is not needed; (iii) Category C : Protective hoarding erected on carriageway; (iv) Category D : Metal hoarding shall be of minimum 2metres high where the

distance between the building edge and the hoarding is more than 1½ times the height of the building.

Demo Spec Page 1-35


1.4.1 Site Safety Measures (Cont'd) (e) Erection And Removal Of Temporary Hoarding (Cont’d) The hoarding shall be designed in accordance with the relevant statutory requirement by a

Professional Engineer employed by the Contractor and the Professional Engineer's drawings, detailing and calculations shall be submitted to the Superintending Officer's Representative for his approval at least two (2) weeks before the hoarding and gates are to be erected. The Contractor and his Professional Engineer shall ensure that the hoarding erected is able to resist the imposed loading designed for. Should the Contractor fail to comply with this requirement, the Superintending Officer's Representative reserves the right to impose any action deem necessary and any costs and expenses incurred thereof including changes shall be recoverable from the Contractor.

The Contractor is to provide metal gates/doors for the main and side entries. Locations of these

entries shall be approved by the Superintending Officer's Representative. There shall be a maximum of two entry points for the entire Site, unless otherwise approved by the Superintending Officer's Representative. The metal gate at the main entrance (for vehicle traffic) shall be locked up after office hour when construction activities have stopped. A side entrance beside the main gate shall be provided for passage of workers and visitors.

The Contractor shall submit to the Superintending Officer's Representative a design theme

including the proposed colour scheme for the hoarding. The finishing coat, graphic pattern and SAFETY SLOGAN shall be approved by the SO Rep. The hoarding and gates shall be maintained at all times to ensure no deterioration of the structure and fading of the paint works throughout the duration of the Contract.

"DANGER, KEEP-OUT" and "NO TRESPASSING" signs in the four official languages are to be

displayed at conspicuous locations on the exterior side of the hoarding. Such signs shall be painted in red on white background with reflective material and approved by SO Rep.

As and when instructed by the Superintending Officer's Representative, the Contractor shall

remove all or part of the hoarding or relocate and reconstruct all or part of the hoarding and reinstate all the affected grounds to the satisfaction of the Superintending Officer's Representative all at the cost and expense of the Contractor. On Substantial Completion of the Works, the hoarding shall be cleared away upon the approval of the Superintending Officer's Representative.

(f) Authorised Operators For Machinery And Vehicles The Contractor shall employ only qualified operators for his site machinery. The operator for

the machinery shall possess a Skill Evaluation Certificate (SEC) from BCA Academy or other approved training centre. For those machinery whereby BCA Academy or other approved training centre does not conduct courses or practical tests for machinery operator, the Contractor shall only authorise an experienced and trained operator who has at least a minimum of 2 years experience in operating the machinery.

In the case of vehicles, which are operated within the contract boundary, the authorised

operator shall possess a minimum valid Class 3 driving licence from the Registrar of Vehicles (Singapore) or an equivalent from their originating countries. The equivalent of a minimum Class 3 driving licence shall first be verified by respective embassy in Singapore and thereafter submitted to Superintending Officer's Representative for approval.

The Contractor shall record the particulars of the operators for the machinery and vehicles in

the prescribed form obtainable from the Safety Unit, HDB. The Contractor shall submit the prescribed form to Superintending Officer's Representative for approval one week before the commencement of the Works. The prescribed form shall be updated and kept on the Site and made available for inspection at all times.

(g) Safety Guards The Contractor shall provide metal safety guards to all moving machine parts that are likely to

injure a workman.

Demo Spec Page 1-36


1.4.1 Site Safety Measures (Cont'd) (h) Workplace Safety & Health Co- Ordinator The Contractor shall employ a Workplace Safety & Health Co- Ordinator with recognised and

approved certification in construction safety to take charge of all matters related to safety on a full-time basis throughout the Time for Completion. The said Workplace Safety & Health Co- Ordinator shall spend their time fully on the Site and perform the following :

(i) To supervise safety and promote safety conduct; (ii) To inspect and rectify any unsafe place of work; (iii) To correct any unsafe practice; and (iv) To ensure that the provisions of the Workplace Safety & Health Act and its Subsidiary

Legislation made thereunder are complied with. The Contractor shall be deemed to have included in the Contract Sum for all costs and

expenses to be incurred by him for compliance with the requirements stipulated in this subclause.

In the event of the Contractor not employing the Workplace Safety & Health Co- Ordinator

required by the Contract or not employing such Site Safety Supervisors for the period or periods required under the Contract, without prejudice to the Employer's rights under the Contract, the Contractor shall be indebted to the Employer at the rate of $4,500/- per Workplace Safety & Health Co-ordinator per month and such indebtedness shall be deducted by the Employer from any monies due or becoming due to the Contractor or be recovered by the Employer as a debt due from the Contractor. This rate shall be deemed to have been fully agreed and accepted by the Contractor and the Employer as the costs and expenses allowed by the Contractor for the employment of a Workplace Safety & Health Co-ordinator for each month. Notwithstanding other provisions in this subclause, if the Contractor incurs additional costs and expenses over and above the agreed rate specified herein in complying with the requirements stipulated in this subclause, the Contractor alone shall bear such additional costs and expenses in full.

The Contractor shall submit the names, documentary evidence of the qualifications of the Site Safety Supervisors within one month from the date of the Letter of Acceptance for approval by the Superintending Officer's Representative.

The Workplace Safety & Health Co-ordinator shall put on a suitable uniform provided by the

Contractor. The type of uniform shall be subjected to the approval of the Superintending Officer's Representative.

The Superintending Officer's Representative may consider the request by the Contractor in

writing to release his Workplace Safety & Health Co-ordinator from the obligations under this sub-clause if the contract has been certified to be more than 95% complete. Nevertheless, one Workplace Safety & Health Co-ordinator shall be stationed on the Site on a full-time basis throughout the Time for Completion.

All differences and/or disputes arising under this subclause (including questions relating to the

interpretation) shall be determined by the Superintending Officer whose decision shall be final and binding on and conclusive against the Contractor.

(i) Safety Training (i) Safety Orientation Course The Contractor shall employ workmen who possess valid Safety Orientation Course

Certificates. The Contractor shall be required to ensure that his workmen attend a prescribed safety refresher course at an interval of time to be decided by the Superintending Officer's Representative.

Demo Spec Page 1-37


1.4.1 Site Safety Measures (Cont'd) (i) Safety Training (Cont'd) (ii) Safety Training Course When directed by the Superintending Officer's Representative, the Contractor shall send

his employees/staff as stipulated hereunder to accredited training providers for appropriate safety training as shown hereunder :

Safety Training Courses Conducted By Accredited Training Provider

Courses Applicable To

Specialist Diploma in Workplace Safety and Health / Workplace Safety & Health Officer (WSHO) Training Course

Safety Personnel for registration as Workplace Safety & Health Officer (WSHO)

Safety Management Course Chairman of Safety Committees, Managers, Engineers and Supervisory Staff

Advanced Certificate in Workplace Safety and Health Workplace Safety and Health Coordinator

Training Course for Safety Committee Members Safety Committee Members

Building Construction Safety Supervisor Course

Building Construction Foremen and Supervisors

Industrial First Aid Course Workers, Safety Personnel and Supervisors

Industrial First Aid Refresher Course Trained First Aiders

SIC (Manhole) for Supervisors Supervisors Safety Instruction Course for Lifting

Supervisors Supervisors

Crawler Crane Operator Course : New entrant programme Refresher programme Familiarisation programme

Crane Operators

Erection of Metal Scaffold Erectors

Slingers/Riggers Course Workers, Foremen and Supervisors Tower Crane Operator Course : New Entrant Programme Familiarisation Programme

Crane Operators

Supervision of Metal Scaffold Erection Supervisors

Climbing Work Platform Operation Supervisors, Workers and Operators

The safety training shall be applicable to all levels of employees/staff stipulated in this

sub-clause including top management at the work Site. Particular attention shall be given to the needs of young employees/staff. Further

training shall be required where : (i) Employees/staff are transferred or where employees/staff take on new

responsibilities or where a change in the work activity or work environment could arise; and

(ii) There is a change in the work equipment or systems of work in use. Training shall be repeated periodically to ensure continued competence.

Demo Spec Page 1-38


1.4.1 Site Safety Measures (Cont'd) (j) Access For The Use Of Mobile Crane And Piling Machines Next To Built-up Area Where the Contractor uses mobile cranes and piling machines on the Site which is next to

existing buildings or public roads or MRT lines, the access for the mobile cranes and piling machines shall be of steel plates or reinforced concrete or bituminous pavement as approved by the Superintending Officer's Representative. All such access shall be provided over adequate compacted hardcore base.

The Contractor shall provide full access for the movement of the cranes and piling machines

and for their lifting or pile driving operations. The access shall be able to distribute the load so as not to exceed the bearing capacity of the underlying materials.

The Contractor shall engage at his own cost and expense a Professional Engineer to design the

access. The drawings and calculations endorsed by the PE shall be submitted for approval by the Superintending Officer's Representative before the construction of the access. The access shall be constructed according to the approved Drawings and maintained in good condition at all times throughout the Time for Completion and any time period where liquidated damages are imposed under the Contract.

The access shall be inspected by the Contractor's PE prior to its use. (k) Warning Signs And Lights The Contractor shall display warning signs of sizes 900 mm x 600 mm at strategic points around

the periphery of the Site where trespassing is likely to occur. Such signs shall have the words "DANGER - KEEP OUT" in the four official languages in red on white background with reflective material and approved by SO Rep. Warning lights shall be placed at similar positions at night to serve as a warning. If work is carried out near public roads, all signage shall comply with the recommendations of the Temporary Road Signage Manual issued by LTA.

(l) Housekeeping The Contractor shall maintain and ensure a safe working environment by keeping the Site neat

and tidy, and free from all hazards and debris. Materials shall be stacked up safely. All workstations and accesses thereto shall be kept free from hazards and debris.

Such housekeeping shall be carried out in such a manner and at such times so as not to cause

any inconvenience to either the adjoining owners, occupiers and the public. Debris shall be wetted to minimize the risk of dust. Containers for debris and rubbish are to be provided at the designated places.

(m) Others The Contractor shall provide and maintain guards or fence or barrier around excavations, lifts

pits or other similar places of danger to prevent accidents. The guards, fences and barriers should be of some material, good construction and adequate strength.

(n) Mobile Crane The Contractor shall submit layout and details of the crane access to the Superintending

Officer's Representative for approval prior to the use of the crane on the access. The Contractor shall ensure and check that the crane access is properly constructed. The Contractor shall keep all records of inspections of the crane access at the Site and produce them for examination when requested by the Superintending Officer's Representative. The boom of the mobile crane with hoisted load shall not be allowed to swing outside the contract boundary without the written approval of the Superintending Officer's Representative. All the hoisting area must be effectively barricaded.

The Contractor shall engage at his own cost and expense a Professional Engineer to design the

access. The access shall be inspected by the PE prior to its use.

Demo Spec Page 1-39


1.4.1 Site Safety Measures (Cont'd) (n) Mobile Crane (Cont'd) The Contractor shall ensure the installation of barriers to warn the crane operator of

depressions, excavated areas and other obstructions. Moment limiters shall be installed for all cranes. The Safety Factor for mobile crane shall have a minimum of 1.5, which includes the built-in factor of safety for the mobile crane. The lifting load shall include the weight of the component/machinery, and the lifting device. A Permit-To-Hoist must be obtained before any hoisting operation is carried out.

The Contractor shall station a lifting supervisor on the Site to oversee and guide the crane

operator during positioning, hoisting and slewing. The cranes shall be tested by an "Authorised Examiner" before its use on the Site irrespective of any valid test certificate. The Contractor shall ensure daily checks are carried out by the crane operator and maintenance checks conducted once every three months. The crane must have overhaul checks before it is used on the Site. Test certificate, overhaul certificates, maintenance certificates, inspection records by crane operator, “Authorised Examiner” and the Contractor's site engineer shall be properly documented, kept on the Site and produced for inspection by the Superintending Officer's Representative.

(o) Crane Operator And Lifting Supervisor

The Contractor shall comply with the Factories (Operation of Cranes) Regulation 1998. He shall

appoint at least one full time lifting supervisor to supervise all lifting operations of any crane for the Site. However, where more than one crane are used on the Site, the number of lifting supervisor employed by the Contractor shall be increased as required by the Superintending Officer's Representative. No lifting activity shall be allowed without the supervision of the lifting supervisor.

The lifting supervisor shall have a minimum of 3 years of experience in construction work and

lifting operations. He must be a site foreman or site engineer and possesses a certificate on Safety Instruction Course for Lifting Supervisor. He shall spend his time fully on all lifting activities and ensure that unsafe conditions are rectified.

The crane operator and lifting supervisor shall carry out their duties strictly according to the

abovementioned Regulations and other duties as the Superintending Officer's Representative deems necessary from time to time.

The Contractor shall submit a list of crane operators and lifting supervisors with the names,

identification card or passport numbers, qualifications and years of experience to the Superintending Officer's Representative for approval one week before the use of the crane. The list shall be updated and kept on the Site at all times. The Superintending Officer's Representative reserves the right to examine the list as and when required.

(p) Gas Cylinders And Related Equipment

The Contractor shall use gas cylinders fitted with a low pressure gauge and a high pressure gauge, a reducing valve with pressure regulator, and safety relief device. The gas cylinders shall not be kept in the same room where welding, cutting or heating is being carried out or placed within five metres of any source of heat. The gas cylinders must always be kept upright in a wheeled-trolley.

The hose connecting a gas cylinder to an apparatus for cutting, welding, heating or other related

works shall be of good construction and sound material, free from Defect, properly maintained, and not entangled or kinked.

A flashback arrester or any other similar device which stops flashback that is acceptable to the

Commissioner for Workplace Safety and Health must be fitted at every outlet of a gas cylinder and every inlet of an apparatus.

The gas cylinders and hoses shall be colour-coded to conform to the SS152 : Identification of

Contents of Industrial Gas Containers or any amendments thereof. The Contractor shall engage a competent person to check the safety devices referred herein

once in every 6 months. The competent person is any person who is competent by education, training and experience on the safety and operational aspects of the use of gas cylinders and related equipment.

Demo Spec Page 1-40


1.4.1 Site Safety Measures (Cont'd) (q) Approved Construction Equipment Contractor shall ensure that the construction equipment/machinery used in HDB work sites are

obtained from the approved suppliers. These equipment/machinery are defined as below: (i) mobile crane; (ii) tower crane (iii) Gondola; (iv) mast climbing platform; and (v) metal scaffold

No machinery/equipment shall be used on work sites other than those obtaining from the approved suppliers who have registered with HDB. The latest HDB Materials List is posted at the following websites: kmo.eptc.com.sg or hdbuilders.com and/or HDB Materials List.

In the case where the equipment/machinery is operated within the work sites for less than a

week, it can be exempted from the requirement of obtaining it from the approved suppliers. (r) Compliance with the Technical Guidelines for Fire Safety in Temporary Buildings in Construction Sites The Contractor shall comply with the Technical Guidelines For Fire Safety In Temporary

Buildings In Construction Sites, including any amendment thereto, issued by the FSSD, Singapore Civil Defence Force. In this connection, the Contractor's PE shall endorse on the plans for all temporary buildings to certify compliance with the said FSSD Guidelines.

(s) Socket-Outlet Assembly The contractor shall provide, install and maintain the socket-outlet assembly (SOA) for all

temporary electrical installations. The SOA shall be manufactured in accordance with CP88:2001:Part 1 (Code of Practice for Temporary Electrical Installations In Construction & Building Sites). It shall be designed for wall mounting or fitted with castors so that it can be moved around on the worksite. Every electrical equipment used must be plugged directly into the industrial SOA.

(t) Prefabricated Mesh Barricade

The Contractor shall provide, erect and maintain a vertical prefabricated mesh barricade (hereafter referred to as “mesh barricade” for the purpose of this clause including all subclauses under it) for all peripheral open sides of construction level of building (excluding multi-storey carpark/garage) where a person is liable to fall from height. Metal access scaffold and working platforms shall be maintained for multi-storey carpark/garage where a person is liable to fall from height. Mesh barricade shall be of sound construction and produced in the factory and installed at the construction level from the inside of the building. Mesh barricade and its support shall be prezinc galvanised or other approved equivalent by the SO Rep, easily installed and dismantled, and reusable throughout the construction (super-structure) stage. External works of the building, such as painting, touching up works, repair and redecoration, and other minor works, shall be carried out using mechanical suspended scaffold or other vertical access equipment. Where the use of mesh barricade is not feasible, as interpreted by SO Rep, during the construction (super-structure) stage, the contractor can counter-propose localised alternative system other than the use of metal access scaffold. Mesh barricade/ counter-proposals for localised alternative system, its vertical support and any components therein shall be in modular sizes and designed according to the Workplace Safety and Health (Construction) Regulations by a PE employed by the Contractor. The PE’s drawings and calculation shall then be submitted to the SO Rep for approval within six weeks from the Letter of Acceptance, before installation and use. Trial setting out of mesh barricade shall be carried out on Site two weeks after approval of submission.

Demo Spec Page 1-41


1.4.1 Site Safety Measures (Cont'd) 1.4.1 (t) Prefabricated Mesh Barricade (Cont’d)

The mesh barricade shall be erected ahead of the structural work (including the construction of water tank rooms) from the second storey and held by a supporting system designed by the said PE. The height of the mesh barricade shall be at least 1.1m above the construction level. The Contractor and his PE shall ensure that the substrate at which the mesh barricade is affixed to, can resist the designed imposed loads. The PE shall satisfy himself that his proposal shall not duly overload the RC structure. Where necessary, the Contractor shall provide, erect and maintain an overlying screening net to cover the entire internal face of the mesh barricade. The installation of the net shall follow the erection of the fence closely. Where necessary, a 90mm high toeboards shall be provided at the base of the net from the inside of mesh barricade. After installation, there shall be no opening between separate sets of the net and any torn net shall be replaced or repaired immediately. The net shall comply with the following requirements:

(i) Maximum mesh size (square) : 15mm square (ii) Twine No. : Minimum 350D (iii) Knot Type : Single or English knot (iv) Minimum 12 ply

The vertical supports of mesh barricade shall be effectively anchored to the building structure.

All vertical supports shall be painted with a bright colour for easy identification. The mesh barricade shall be erected according to a pre-determined safe work procedure established by the Contractor, or substantially dismantled, by trained erectors, under the immediate supervision of a competent supervisor. The mesh barricade and its components shall only be erected and dismantled by workers using life-line and safety belts or other equivalent, if not better, means of preventing a fall. The Contractor shall under no circumstance, use the prefabricated mesh barricade and vertical supports for other purposes.

1.4.2 Safety Infringement The above provisions shall be made to the satisfaction of the SO Rep. The Contractor shall

include in his Contract Sum all the costs and expenses for complying with the safety requirements.

In the event of any accident or mishap occurring on Site, whether or not caused by the

inadequacy of safety provision or non-compliance with safety regulations, the Contractor shall immediately notify the SO Rep and the HDB and any other relevant Authority.

Depending on the nature and extent of the accident or mishap, the SO Rep , HDB or any other

Authority may order a total or partial stoppage of work to allow investigations and/or remedial measures to be effected. In the event of such stoppage, or any stoppages of work due to safety violations, the Contractor shall not be entitled to any claims for compensation or extension of time for completion.

The SO Rep will conduct periodic inspections on the provision of safety measures together with

the Contractor's Workplace Safety & Health Co-ordinator or foreman. The Contractor shall rectify immediately all contraventions against the Workplace Safety & Health Act and its Subsidiary Legislation, Workplace Safety and Health (Construction) Regulations or safety measures specified. All Works or partial works may be stopped until further notice from the SO Rep if the total number of contraventions or non-compliance is four or more or when the SO Rep considers the working environment unsafe for Works to continue. If the contravention or non-compliance is not rectified at a subsequent inspection, the SO Rep shall exercise its rights under the “Nuisance and Irregularities” clause to impose charges against the Contractor.

Demo Spec Page 1-42


1.4.2 Safety Infringement (Cont’d) The SO Rep shall at its absolute discretion exercise its rights under the “Nuisance and

Irregularities” clause to impose charges against the Contractor for the following types of accidents occurring in the course of or arising out of or in the consequence of the Works:

(i) For each instance of fatal accident, if the accident is established in part or in whole by

the SO Rep or any local Authority, to be the result of the defaults, acts, omissions or negligence of the Contractor. This charge shall not be refunded to the Contractor;

(ii) For each instance of accident, if the SO Rep, HDB or the Competent Authority is of the

opinion that the accident is the result of the failure of the Contractor to provide necessary and sufficient safety measures stipulated in the Contract or Workplace Safety & Health Act and its Subsidiary Legislation, the Workplace Safety and Health (Incident Reporting) Regulations.

(iii) Dangerous occurrence as classified in the Subsidiary Legislation, Workplace Safety and

Health (Incident Reporting) Regulations, Part II if the SO Rep, HDB or the Competent Authority is of the opinion that the dangerous occurrence is the result of failure of the Contractor to provide necessary and sufficient safety measures stipulated in the Contract or the Workplace Safety and Health Act and its Subsidiary Legislation, the Workplace Safety and Health (Incident Reporting) Regulations.

1.4.3 Reporting Of Accidents In the case of an accident or a dangerous occurrence, as classified under Subsidiary Legislation,

Workplace Safety and Health (Incident Reporting) Regulations, Part II, the Contractor shall notify the Commissioner and HDB within one hour of such accident or dangerous occurrence.

Upon receipt of information of an accident or dangerous occurrence, the SO Rep or HDB may at its

discretion make a preliminary investigation of the circumstances and record its finding upon such investigation.

Notwithstanding the aforementioned requirements, the Contractor shall in addition, give written notice

of such accident or dangerous occurrence in the form set out in the INCIDENT NOTICE - HDB and submit it to the HDB on a timely basis. The form is obtainable at the HDB.

Upon submitting the INCIDENT NOTICE to the HDB, the Contractor shall arrange for the injured

workman, witnesses and an interpreter, if necessary, to report to the HDB to furnish evidence relating to the accident or dangerous occurrence.

If the Contractor fails to give any required notice or fails to furnish evidence of the accident or

dangerous occurrence as required in this Clause, the SO Rep or HDB may at his absolute discretion exercise his rights under the Nuisance And Irregularities clause to impose charges against the Contractor

SECTION 2/...

DEMO13/INDEX2.DOC(1) oym(151212) (DPG)

TECHNICAL SPECIFICATIONS

Demo Spec Page 2-1


SECTION 2 2.0 DEMOLITION (GENERAL) 2.1 SCOPE OF DEMOLITION WORKS 2.1.1 Works Included (a) Removal of debris and unwanted materials from vacant structures, sealing off and boarding up

for structures under preservation as specified and as directed by the Superintending Officer's Representative.

(b) The demolition of existing structures within the contract boundaries shown. (c) Hack up floors, paths, drains, dig up all footings, foundations, pilecaps including cutting off

protruding steel bars from pile heads and cart away from site all materials demolished. (d) The digging up of existing footpaths, roads or driveway of carparks, surface water channels

and removal of existing fencing within the contract boundary as shown and as specified. (e) All existing holes, pits, trenches, etc and excavated areas are required to be backfilled, levelled

and consolidated with approved imported earth where necessary. (f) Removal of demolished materials and debris from site. (g) Leave site clean and level on completion. (h) Provide new close turfing to the demolished ground as required and specified in Section 4. 2.1.2 Works Excluded (a) Electrical, Sanitary And Other Fittings All existing electrical/sanitary/gas fittings/installations and any signboards which are

Government's properties - the Authorities/Departments concerned are authorised to remove such items before demolition work commences. Tenderers are NOT to include such items in their Tender.

(b) All Existing Turfing And Trees All existing turfing and trees within the contract boundary is excluded from this contract unless

otherwise specified. The demolition contractor is not allowed to strip or excavate any turf or remove any tree from the site.

(c) Common Fencing (d) Party Wall of Adjoining Building (e) All Existing Piling Works

Demo Spec Page 2-2


2.2 FOOTINGS/PILECAPS The Contractor shall visit the site to acquaint himself with the type of structures that he may

encounter. He can purchase structural drawings from SED, HDB at his own cost and expense, to serve as a guide on the type of structure and foundation of the building. Where buildings are of reinforced concrete type, the Contractor will have to allow for digging up and removal of footing and pilecap foundation, cutting of steel bars which are of unknown depths and sizes as no claim for extras arising out of misunderstanding of this Clause will be entertained. The Contractor shall inform and sought approval from the Superintending Officer's Representative before commencing excavation. The Contractor shall propose to the Superintending Officer's Representative an auditable system of excavate, breakup and removal of each and every part of the foundation and pilecaps. The system shall include graphical representation of the foundation and pilecaps, check sheets and photographic records of work done. The Contractor shall sign the Letter of Undertaking to guarantee that all existing foundations are excavated and cart away from the site. A specimen of the Letter of Undertaking is as shown in Appendix II .

2.3 DEMOLISHED MATERIAL All demolished material, except those stated in Clause 2.1.2 shall belong to the Contractor. The

Contractor shall cart away from Site all demolished materials and debris as the work proceeds and not to allow them to accumulate on Site.

2.4 DEMOLITION OF TEMPORARY STRUCTURES Temporary structures may belong to the squatters and they are permitted to remove the whole or part

of the building structures. The Contractor shall allow squatters sufficient time to carry out such removal and shall then remove the building materials or debris left behind including all footings/foundation and cart them away from Site without additional payment from or to the Employer.

2.5 DEMOLITION OF SITEWORKS AND OTHER STRUCTURES The Contractor shall allow in his tender for breaking up and removal from Site all existing

miscellaneous structures such as drain covers crossings, house drains, manhole, house sewers, concrete steps, footpaths, lamp post and any other items, all as directed by the Superintending Officer's Representative. The Contractor shall take all necessary precaution when breaking up and removing and shall consult the Competent Authority where necessary and subsequently make good all affected works to the satisfaction of the Superintending Officer's Representative.

2.6 PROTECTIVE HOARDING In pursuant with Clause 1.4.1(e), the Contractor shall provide, erect and maintain temporary protective

hoarding around the contract boundary as proposed by the Contractor's Professional Engineer. He shall also provide overhead protections and planked footways where necessary to comply with the relevant statutory Regulations and Requirements. The hoarding shall be of good quality considered suitable for use in the demolition site. Works will not be allowed to commence work unless the hoardings are approved by the Superintending Officer's Representative.

The hoarding must have a two-leaf solid gate of sufficient width for vehicular passage and lockable to

prevent unauthorised entry. Strong padlock shall be used. The hoarding shall be properly painted to present neat and bright appearances as directed by the

Superintending Officer's Representative. The hoardings, overhead protections and planked footways shall only be removed upon permissions

given by the Superintending Officer's Representative.

Demo Spec Page 2-3


2.7 MEASURES FOR DUST CONTROL The Contractor shall erect double layer PVC fine netting as screen for dust control. The netting shall

be supported by metal scaffolding. Details of the supports shall be proposed and designed by the Contractor and subject to the approval of the Superintending Officer's Representatives.

The netting screen shall fully envelope all sides of the block without gap unless otherwise approved

by the Superintending Officer’s Representative for purpose of working space for the discharge of demolition materials. Where approved, the gap for the working space for the discharge of demolition materials shall not be wider than one third of the length of the block.

The Contractor shall take additional measures to spray water during all demolition work to minimize

the amount of dust generated from the demolition works. Water spray shall be by means of high pressure water jet capable of water delivery of on average 20 litres/min at 180 Bar.

2.8 DISMANTLING OF EXISTING LIFT ITEMS AND PARTS The HDB reserves the right to recover any lift parts from the lift installation. Unless otherwise

provided, the Contractor shall provide all labours, Construction Equipments, tools, haulage and all necessary equipment to dismantle lifts and parts and deliver them to a designated location within Singapore for safe-keeping. The parts recovered and delivered shall be kept in a condition to allow reuse.

2.9 DELAY IN HANDING OVER OF STRUCTURES The Contractor's attention is drawn to the fact that not all structures within the Contract boundary will

be vacant for the purpose of demolition work upon the commencement of contract period. The Contractor shall allow for this factor in his tender price and no claim will be entertained by the Employer should the structure be handed over to the Contractor after the commencement date of the contract period. Appropriate extension of time will be granted to the Contractor if the Superintending Officer is satisfied that the delay in handing over the structure has affected the timely completion of the contract.

2.10 NO COMPENSATION FOR STRUCTURES GUTTED BY FIRE (a) All structures at Sites are exposed to certain degree of fire risks. The successful tenderer is

advised to take out his own fire insurance policy against possible fire damaging the existing buildings and materials. No claims for compensation in respect of any loss suffered by the Contractor resulting for such fire will be entertained by the Employer.

(b) The Contractor must therefore consider and have the following elements reflected in his

quotation/tender price as no claims will be entertained by the Employer : (i) the aforesaid fire risks; and (ii) the removal of debris resulting from any fire incidents. 2.11 DEMOLITION OF MORE THAN TWO BLOCKS SIMULTANEOUSLY The Contractor is deemed to have included the cost and expense of carrying out the Works

simultaneously at the Superintending Officer's Representative's direction as more than two (2) blocks may be handed over to the Contractor at the same time.

The Contractor shall not be entitled to and is deemed to have waived any claim for cost or expense

arising from such instruction.

Demo Spec Page 2-4


2.12 GENERAL NOTICE TO TENANTS/RESIDENTS OF NEARBY BLOCK The Contractor shall, at any such time as the Superintending Officer's Representative may direct,

collect a number of standard notices from the Employer. A specimen of the standard notice is as shown in Appendix III .

The Contractor shall distribute these standards notices to all units of apartment/building blocks in the

vicinity of the vacant block or structure to be demolished, as directed by the Superintending Officer's Representative.

The standard notices shall only be distributed five (5) working days before the actual commencement

of hoardings works at the Site of the vacant block or structure to be demolished. The Contractor shall not : (i) purport to represent the HDB by drafting, distribution or posting his own notices and signing off

"HDB" or "HDB Contractor" without prior written approval from the HDB; (ii) attach any advertisement, literature or letter with the HDB's standard notices, when distributing

these notices. Upon completion of the distribution of these standard notices, the Contractor is to inform the

Superintending Officer's Representative in writing. If the Contractor fails to distribute notice to residents as directed by the Superintending Officer's

Representative, the Superintending Officer's Representative shall at his absolute discretion exercise his rights under the "Nuisance and Irregularities" clause to impose charges against the Contractor.

2.13 NOTIFY AUTHORITIES CONCERNED Before demolition work commences, the Contractor shall inform and check finally with the Estates &

Lands Division (Branch Office), Housing & Development Board, to make sure all occupants have been cleared away from Site.

The Contractor shall inform and check with the relevant Services Department, Singapore Civil

Defence Force and other local authorities to ascertain the position of their respective existing services and whether such services need to be preserved.

2.14 TAKING OF PHOTOGRAPHS The Contractor shall provide for the taking of photographs in accordance with the requirements listed

below : (a) Photographs taken shall provide a contrast of the Site before and after the demolition works. (b) The photographs must show the addresses of the blocks that are being demolished and in the

different stage of demolition. (c) Photographs shall be taken from at least four different directions. (d) All facilities such a playground, hardcourt, dustbin compound, substation, kiosk, carpark,

signages etc shall be shown in the photographs. (e) Excavation and the removal of all pilecaps shall be captured in the photographs. All negatives and two (2) sets of each of the colour printed photographs on the above requirement

shall be submitted to the Superintending Officer's Representative for record purpose. The processing fees and all other related charges shall be borne by the Contractor.

Demo Spec Page 2-5


2.15 KEEPING SITE DRY PRIOR TO REFILLING/LEVELLING The whole of excavated Site shall be kept free from water ponding arising from rain, flood or other

causes by pumping, pailing, drainage or other approved means at all time prior to refilling/levelling. Should any water get into the Site, the Contractor shall remove such water and excavate the affected

wet soil out of site and replace with dry earth in layers as specified. The Contractor shall report to Superintending Officer's Representative for inspection when Site is

ready for levelling or refilling. No further work shall be carried out unless the Superintending Officer's Representative is satisfied that the fill Site is free from water ponding.

Where additional refill material are brought onto site, they shall be of quality capable of being

compacted in the manner specified to form a stable fill and shall not comprise of un-suitable material including material from swamps; peats, logs, stumps and perishable material; material susceptible to spontaneous combustion; soil of liquid limit exceeding 70 and/or plasticity index exceeding 35; and/or material having an in-situ moisture content greater than the maximum permitted for such materials in the Contract, unless otherwise permitted by the Superintending Officer’s Representative.

2.16 COMPACTION OF EXISTING PLATFORM The compaction of the platform shall be carried out by rolling successively with at least an approved

10 tonne or heavier vehicle such as smooth wheel roller, tamping roller, pneumatic typed roller and vibrating smooth drum roller. All refilled materials shall be compacted in layers as soon as practicable after deposition. The thickness of each layer compacted shall be compatible with the compaction plant used and shall be agreed by the Superintending Officer’s Representative. The Contractor shall allow in the Contract Sum for all costs and expenses incurred in executing compaction by whichever method he has adopted and any subsequent alteration as directed.

Should any depression appearing during the compaction, the depressed portion shall be topped up

with approved material, levelled and compacted again. 2.17 METAL ACCESS SCAFFOLD AND WORKING PLATFORMS The metal access scaffold used on site shall be of a type approved by the MOM. It shall comply with

the requirements of the Singapore Standard Code Of Practice For Scaffolding, CP 14 and any amendment or re-enactment thereto. The metal scaffold shall be prezinc galvanised or other approved by the Superintending Officer's Representative.

The metal access scaffold and any components therein shall be designed according to the CP 14 and

Factories (BOWEC) Regulations by a PE employed by the Contractor. The Professional Engineer's drawings and calculation shall be submitted for approval of the Superintending Officer's Representative before the erection of the scaffold.

The scaffold shall be erected according to the Drawings of the Professional Engineer. The Contractor

and his Professional Engineer shall ensure that the building structure can resist the load imposed by the scaffold. The scaffold shall be designed to carry metal working platforms and two working levels in use concurrently. The maximum average loading per working level per bay is 220 kg per m2. Signboards showing the maximum loading allowed on the scaffold shall be displayed on the scaffold.

The Contractor shall provide, erect and maintain continuous galvanised metal working platforms or

other approved by the Superintending Officer's Representative. The material used for the metal working platform shall be at least 1mm thick galvanised steel. Working platforms shall be adequately secured to scaffolding frames at the required levels. The connections between working platform and scaffolding frame shall be subject to the approval of the Superintending Officer's Representative. For any portion of the working platform where the use of metal is not suitable, the Contractor may use timber platform subject to the approval of the Superintending Officer's Representative. The platform shall be complete with 200mm high metal coloured toeboards and metal guardrails at least 1.1m above the platform.

Demo Spec Page 2-6


2.17 METAL ACCESS SCAFFOLD AND WORKING PLATFORMS (CONT'D) The platform shall be at least 635mm in width and the edge of the platform shall not be more than

40mm away from the inner face of the standards of the scaffolding frame. The Contractor shall provide, erect and maintain an overlying screening net to cover the entire external face of the scaffold. The installation of the net shall follow the erection of the scaffold closely. A 200mm high metal coloured toeboard shall be provided at the base of the net. After installation, there shall be no opening between separate sets of the net and any torn net shall be replaced or repaired immediately. The net shall comply with the following requirements :

(i) Maximum mesh size (square) : 15mm (ii) Twine No. : minimum 350D (iii) Knot type : single or English knot (iv) Minimum 12 ply The scaffold shall be effectively tied to the building structure by means of tie-backs. All tie-backs shall

be painted with bright colour for easy identification. The scaffold and any components therein shall be erected, or substantially extended to or dismantled,

by scaffold erectors, under the immediate supervision of a scaffold supervisor, according to the Regulations. The scaffold and its components shall only be dismantled and removed after the Superintending Officer's Representative has given his permission.

2.18 PROTECTION OF EXISTING LIVE SERVICES AT WORKAREA Before commencement of site clearance and demolition works, the Contractor shall ensure that all

lives services, above, on or under ground, which are or likely to be affected by the site clearance and demolition works, such as gas mains, electricity cables, telephone lines, etc, have been diverted, disconnected or capped.

Where it is necessary to maintain such live services during demolition works, all such underground

live services shall be protected with adequate and substantial coverings or protection as proposed by the Contractor’s Professional Engineer and approved by the Superintending Officer's Representative.

During the progress of demolition works, the Contractor shall continue to detect/inspect all such

protections to prevent any hazard from arising as a result of the live services being damaged or being exposed as a result of excavation.

For live services, on or above ground, the Contractor shall mark all such live services as danger

areas. Suitably constructed barriers or protection shall be put in place to prevent accidental damages to such services. Relevant danger signboards shall be displayed and maintained at such location throughout the duration of the works. All safety signboards shall conform to relevant BS. The Contractor shall ensure that all supervisors, drivers, crane operators, and other workmen are kept informed of such danger areas at all times during the progress of the works.

2.19 MANAGEMENT OF HAZARDOUS MATERIAL If a controlled hazardous substance is to be used on site, the Contractor shall apply for the relevant

permit from ENV/NEA and submit the license to the Superintending Officer’s Representative for record purpose. The Contractor shall keep a registry for list of hazardous substances and also keep track of quantity used using the material safety datasheet obtained from the suppliers for the information of all users.

Contractor shall ensure that all hazardous material brought to site shall be properly labelled (including

warning sign). Only trained personnel may be allowed to use the hazardous materials. Where ever possible, alternative non-hazardous substance shall be used. Contractor shall ensure that all hazardous material brought onto site shall be managed in compliance with the Environmental Pollution Control (Hazardous Substances) Regulations and all other legal and statutory requirements.

Contractor shall ensure that hazardous chemicals are properly stored and separated from other

commonly used substance and ensure that emergency procedures are maintained as well as provide the necessary equipment to protect the workers and environment.

Demo Spec Page 2-7


2.20 REMOVAL OF ASBESTOS MATERIAL IN BUILDING All asbestos removal work shall be undertaken by the Contractor in strict accordance to the "Guideline

on the Removal of Asbestos Materials in Building" issued by the Department of Industrial Health, Ministry of Manpower. These guidelines spell out safe work procedures and practices that workers carrying out such removal should follow.

In general, the Contractor shall notify the Chief Inspector of Factories at least 28 days before

commencement of such work in accordance to The Workplace Safety & Health Act (Asbestos) Regulation, 1980. Workers shall be required to have a X-ray examination before they start work, summary report to be submitted to Department of Industrial Health, MOM.

Prior to the physical removal of the asbestos material, preparation of the asbestos work area shall be

carried out by removing all movable objects to prevent contamination. All immovable objects should be covered with polyethylene sheeting. The Contractor shall demarcate the asbestos work area to prevent unauthorised access, include displaying of warning signs. The asbestos material shall be removed with minimal breakage and shall be supplemented by vacuuming using high efficiency particulate air (HEPA) filter and/or wet method using water spray. Workers shall be required to use respirators, goggles and protective clothing, afterwhich the clothing shall be disposed.

All debris, clothing shall be collected into sealed, labelled impermeable containers. The Contractor

shall be responsible to consult The Pollution Control Department, NEA on the disposal of asbestos material.

2.21 PROJECT INFORMATION BOARD The Contractor shall erect and maintain a Project Information Board, which shall not be smaller than

2m x 1m, at a location near the Site Entrance as directed by the SO Rep. The Project Information Board shall contain, at least, the following information :

(i) Description of Contract

(ii) Name of Contractor

(iii) Registered Office

(iv) Name and Logo of Employer

(v) Contract Period

(vi) Contact Person

(vi) Contractor's Contact No.

The Project Information Board shall be erected and completed within one(1) month from the

commencement of the Contract. The Contractor shall submit his proposed details and locations for the Project Information Board to the SO Rep for approval before erection. The Project Information Board shall not be removed without the prior approval of the SO Rep.

2.22 SUBMISSION OF PROPOSAL AND CERTIFICATE OF SUPERVISION All Works requiring the Contractor to submit his proposal for the approval of the SO Rep shall be

stipulated in the Drawings and/or Specifications. The Contractor shall submit detailed structural plans and design calculations, certified by his PE to the SO Rep not later than one month from the commencement date of the Time for Completion or 2 weeks before the actual commencement of the Works for such proposals whichever is earlier. The Contractor shall bear all consequences for late submission. The Works shall be supervised by the Contractor's PE.

Not later than two (2) weeks after the completion of the Works, the Contractor's PE shall submit a

Certificate of Supervision, stating that he has carried out such supervision work and is fully satisfied that the Works have been constructed in accordance with his structural plans and design calculations as approved by the SO Rep.

Demo Spec Page 2-8


2.23 TEMPORARY ELECTRICITY SUPPLY AND INSTALLATION The Contractor shall engage a Licensed Electrical Worker (LEW) of at least an ‘Electrical Technician’

Grade to design all temporary electrical installations necessary for the Works. The installations shall comply fully to the requirements as stated in the latest edition of Singapore Standard Code of Practice on Temporary Electrical Installations (Construction And Building Sites) CP 44 applicable at the date of closing of the Tender. Throughout the Time for Completion and any time period where liquidated damages are imposed under the Contract, the Contractor’s LEW shall ensure good safety standards and practices and including the following:

(a) The Contractor is strongly encouraged to use PowerGrid Ltd’s power supply to provide

temporary electricity supply. All electrical generator sets shall be licensed with valid EMA’s licence. A minimum capacity of 75kVA generator shall be used unless otherwise approved by the Superintending Officer’s Representative.

(b) All electrical switch board which holds the ELCB shall be housed in a switch box located at

least 1.5 m from the floor level; (c) Socket-outlet assembly complete with miniature circuit breakers (MCBs) and residual current

operated circuit breakers (RCCBs) is to be provided. (d) All sheaths of cables, sockets outlets and plugs are in good working condition; (e) All cables are properly bound and do not cause obstruction; (f) All cables are properly supported with L-shaped galvanised steel brackets or insulated lock

bands and placed at a suitable height, away from any source which cause mechanical damage;

(g) All plugs, socket-outlets, cable couplers and plug adaptors are to be of the standard industrial

type and of minimum classification of IP 44. (h) The supply to provide artificial lighting shall be taken from the socket-outlet assembly. 4 feet

fluorescent lighting enclosed in suitable mechanical enclosure to minimum classification of IP 44 shall be used to provide temporary lighting.

2.24 EXCAVATION GENERALLY The Contractor shall be deemed to have visited and examined the Site carefully and to have

ascertained the nature thereof and the kinds of materials to be excavated, and to have made provision in the Contract Sum to cover for the type of materials to be excavated.

Prior to the commencement of excavation, the Contractor shall carry out a pre-construction survey of

the neighbouring properties and comply with the requirements of BCA. The Contractor shall set out the lines and structures for the inspection and approval of the Superintending Officer’s Representative. Original ground levels shall also be taken and submitted to the Superintending Officer’s Representative for record.

Excavation shall be carried out neatly in accordance with the Drawings, in whatsoever material may

be found, including hard rock or other hard material which requires breaking up by pneumatic drills and the excavated materials shall be used as filling if required.

The Contractor shall be allowed to carry out the excavation by his own methods subject to the

approval of the Superintending Officer’s Representative. The excavated materials may be temporarily stockpiled on the Site during the course of the Works

provided there is sufficient space available and such stockpiling shall not cause obstruction at the work Site and such stockpiling shall be covered to prevent the excavated materials from being washed into the drains and canals. In areas of poor soil, all excavated materials shall be completely removed from the Site. The Contractor shall be held fully responsible for all damages caused by the non-removal or improper stockpiling of excavated materials on the Site.

Demo Spec Page 2-9


2.24 EXCAVATION GENERALLY (CONT”D) The Superintending Officer’s Representative may prescribe and limit the lengths and/or widths and/or

depths of excavation to be proceeded with at any one time. The Contractor may be provided with a site to dump and spread the surplus excavated materials as

directed by the Superintending Officer’s Representative. Alternatively, the Contractor may be required to dispose of any surplus materials and shall if so required provide lorries for transport and shall make all necessary arrangements for the use of an approved dumping ground and bear all costs and expenses thereof. The Contractor shall not deposit surface excavated materials on private land unless he can produce the written permission of the owner of the land.

2.25 EMERGENCY RESPONSE PLAN

Contractor shall establish and maintain procedures to identify potential for and respond to accidents

and emergency situations, and for preventing and mitigating the environmental impacts that may be associated with them.

The Contractor shall ensure that reasonably foreseeable emergency situations are identified and

establish the emergency procedures for the worksite, and make aware the response procedures and requirements to all site staff.

Site operational control procedures shall also be established and maintained to ensure that

emergency situations do not arise. Preventive measures such as smoking in designated areas, undertaking of hot works only after prior approvals, storage of chemicals in designated locations, etc shall be incorporated to avoid the occurrence of an emergency.

The Emergency Response Plan shall include the relevant content such as objective, purpose,

appointment of Workplace Safety & Health Officer, Fire Fighting Team, Emergency Response Organisation Chart. The structure of the Emergency Response Organisation as well as their roles and responsibilities and the list of contact numbers (ie. office ext/ pager/handphone) of the key personnel as well as the important contact numbers shall be made available to relevant site staff.

The Contractor shall ensure that the key appointment holder have received appropriate training to

carry out their responsibilities in case of emergency and the Plan shall indicate the action to be taken by the appointment holders and also the other personnel such as informant, Workers/Site Staff/Security Personnel. The duties and responsibilities of the Contractor, Workplace Safety & Health Officer, Security Officer, Fire Fighting Team shall be clearly described in the Plan.

Contractor shall be responsible to conduct drills to ensure the preparedness of key personnel and

equipment.

This Emergency Response Plan shall be made available to relevant personnel and be submitted to the Superintending Officer’s Representative prior to the commencement of demolition works for review and revision where necessary.

2.26 GENERAL REQUIREMENTS FOR ELECTRICAL WORKS The electrical works include electrical installation, lighting installation, lightning protection works, and

other miscellaneous electrical works. The electrical installation shall comply with all statutory rules and regulations of the Electricity

Management Authority (EMA), Government Authorities, Statutory Authorities, Power Supply Limited and PowerGrid, current at the date of submission of the Tender and to the complete satisfaction of the SO Rep.

In particular, the electrical installation shall comply with the following:

(i) Electricity Regulations under the Public Utilities Act; (ii) Singapore Standard CP 5; (iii) Any additional regulations issued by EMA, SPSL and PowerGrid. All other electrical works shall comply with their respective Codes of Practice.

Demo Spec Page 2-10


2.27 MAINTENANCE AND MANAGEMENT OF SITE WITH VACANT BLOCKS UPON TAKING OVER The Contractor shall carry out and complete the following works within three (3) working days, upon

taking over the site with vacant blocks:

(a) Conduct check to ensure no “illegal objects” within the building and units. (b) Deploy and station a licensed security guard as specified. © Carry out preliminary pest control and surveillance work by licensed Pest Control Operator as

specified. (d) Seal off the whole peripheral of each block handed over with orange PVC barrier fencing to

prevent unauthorized entry to the block via the staircases, ground floor units etc. (e) Supply and install temporary lighting (where necessary) to ground floor of the block. The

electrical installation work shall be carried out by licensed electrician. The lighting shall be switched on between 7 pm to 7 am. All cost incurred in providing the lighting shall be borne by the Contractor. The temporary lighting shall be discontinued upon the completion of the hoarding.

Contractor shall confirm in writing to the Supervising Officer upon completion of the works above not

later than the 4th working day after taking over.

SECTION 3/...

Demo Spec Page 3-1


SECTION 3 3.0 DEMOLITION (TECHNICAL) 3.1 WORK METHODS The Contractor shall carry out demolition works in accordance with the current Code of Practice on

demolition - SS 557 and also in compliance with the provisions of BS 6187: 1982. The Contractor shall submit to the Superintending Officer's Representative for his approval, any

methods of demolition. The Contractor shall be certain and shall ensure that the proposed method will not damage or affect

the adjoining structures or any other installations and shall reinstate at their own cost, any damage to such structures or installation to the satisfaction of the Superintending Officer's Representative.

The Contractor shall obtain a copy of the structural plan from the SO Rep and the Professional

Engineer engaged by the Contractor shall study the drawings and determine the principle of design and the method of construction used.

The Contractor shall engage a Professional Engineer to design and submit in triplicate the method

and sequence of demolition and removal of all permanent and temporary structures for the approval of the Superintending Officer's Representative and shall include the following items :

(a) a copy of a key or location plan. (b) a copy of site plan showing the building to be demolished. (c) a report containing his recommendations on the appropriate measures to be taken to ensure

public safety and preventing damage to any adjoining building or property. (d) Calculations to determine the stability of the structural members, if the structural members

is/are subject to debris, plant and equipment load. The grade of concrete used in the calculation shall be that obtained from concrete strength test conducted by the contractor at his own cost. The test shall be carried out by an accredited laboratory in accordance with BS 8110 and assessed in accordance with BS 6089. The contractor is required to submit his testing proposal, which shall include the type of test, frequency of test and location of test for the approval of the Superintending Officer's Representative. In the absence of concrete strength test report/s, the grade of concrete used in the calculation shall not be greater than 10N/mm2.

The contractor may use either Windsor Probe test or core test or any other test as approved by

the Superintending Officer's Representative. The guidelines for the tests conducted using Windsor Probe and core tests are as follows :

Recommended Test

Guidelines for Concrete Strength Testing

Location Frequency

Windsor Probe Test

8 storey and above At every 5th storey and thereafter

10 tests per floor randomly selected throughout the entire floor. Below 8 storey At any one floor

Core Test 8 storey and above

At every 5th storey and thereafter

5 cores per floor randomly selected throughout the entire floor. Below 8 storey At any one floor

(e) The Contractor's PE to supervise the construction of the temporary works and to submit a

Certificate of Supervision within two weeks upon completion of the temporary works.

Demo Spec Page 3-2


3.1 WORK METHODS (CONT'D) The submission of the concrete strength test report shall be accompanied with a plan showing the

position of the tests for the approval of the Superintending Officer's Representative. His recommendations shall take into account of the nature and condition of the concrete, the condition

and position of reinforcement and the possibility of lack of continuity of reinforcement shall be ascertained. He shall ascertain the principles of the structural design to determine which parts of the structure depend on each other to maintain overall stability.

He shall propose a system of temporary support for the slab, if the method of demolition proposed

requires plant and machinery to be placed on the slabs/beams and calculation shows that the slabs/beams are unable to withstand the additional load imposed by the plant or machinery.

Should it appear to the Superintending Officer's Representative at any time that the work methods

proposed by the Contractor will cause damage or affect the adjoining structures or any other installations, the Superintending Officer's Representative may require the Contractor to make at his own cost and expense such modifications to the original work methods as the Superintending Officer's Representative may consider necessary or appropriate.

3.2 PRELIMINARY SURVEY Before any works of demolition are started the contractor shall carry out a detailed visual survey and

examination of the physical condition and structural stability of the building to be demolished and other surrounding buildings and report to the Superintending Officer's Representative any potentially dangerous site condition. Photographs should be taken where necessary.

The contractor must report whether constituent materials have deteriorated in strength which could

result in instability arising due to a particular demolition process. 3.3 PRECAUTIONS AGAINST UNCONTROLLED COLLAPSE The contractor must ensure that the removal of certain part of the building or structure during

demolition will not result in other parts becoming unsafe. At any time, should it appear to the Superintending Officer's Representative that the other parts have become unsafe or the structural integrity of the building is compromised, the Contractor shall propose to the Superintending Officer's Representative all necessary remedial actions to provide adequate support to the building to prevent uncontrolled collapse, all at his own cost.

The contractor must pre-determine where temporary support will be needed. If the structure abuts

other buildings, the abutting buildings should be given such lateral support as is given by the structure to be demolished. Provision should be made for the erection of adequate shoring designed by Professional Engineer (Civil or Structural) before the existing lateral support is disturbed.

3.4 SAFETY PRECAUTIONARY MEASURES The Demolition Work shall be carried out only in the presence of an appointed full time skilled and

competent supervisor, with experience in demolition work and where applicable, strictly in accordance with the directions of the Professional Engineer engaged by the Contractor. The appointment of the competent supervisor by the Contractor shall be in writing to the Superintending Officer's Representative.

Buildings and other structures should be demolished in the reverse order to that of their construction.

The order of demolition for buildings should be progressive, storey by storey, having regard to the type of construction.

Demo Spec Page 3-3


3.4 SAFETY PRECAUTIONARY MEASURES (CONT'D) Demolition debris should only be allowed to fall freely to the ground internally or externally where the

horizontal distance from the point of fall to a public access, or adjoining property, is not less than 6m or half the height from which the debris is dropped, whichever is greater. In cases when demolished material is allowed to fall freely externally, a covered hoarding with catch fan should be provided. In other cases, chutes or skips should be used.

Before walls are demolished, sections of the floors should be removed by hand demolition to facilitate

the free fall of debris. Debris should not be allowed to accumulate above an average height of 2m from ground level before

removal, nor should it be allowed to subject the containing structure to undue lateral pressure. When material is being dropped, a look out man should be posted to ensure safety generally. The demolition by swinging ball method should not be used on parts of buildings in excess of 24m in

height. 3.5 PRECAUTIONS AGAINST VIBRATIONS AND CONCUSSION The contractor should take special care when demolishing tall buildings to ensure that no undue

vibration or concussion is caused which could result in damage to other properties, MRT, pedestrian crossings, underground services or drains, or damage to adjacent property by flying debris.

If the building to be demolished is within the MRT Protection Zone, the contractor will have to comply

with the latest LTA Code of Practice for Railway Protection and Mass Rapid Transit (Rail Protection, Restricted Activities) Regulations.

The contractor must submit proposals for monitoring the MRT structures for vibrations generated by

the demolition works. The vibration generated should not exceed peak particle velocity of 15mm/s. The proposals to be submitted to The Mass Rapid Transit Corporation for approval prior to the

commencement of demolition works are as follows : (a) Proposal for monitoring the MRT structures for vibration generated by demolition work. (b) Method statement of demolition including equipment to be used and proposal to reduce impact

from falling debris onto the ground. (c) Proposal to trap/minimise dust from being sucked into MRT vent shaft and affecting the railway

operation. (d) Condition survey of the affected structure carried out by independent qualified Building

Surveyor.

SECTION 4/....

Demo Spec Page 4-1


SECTION 4 4.0 TURFING 4.1 SITE PREPARATION AND TURFING The Contractor shall allow for turfing Works, forming slopes and platforms with even surfaces to the

existing levels or as otherwise instructed by Superintending Officer’s Representative. Clear away loose stones, gravels, tree stumps and building debris. Seek the approval of the Superintending Officer’s Representative before commencing turfing Works.

4.1.1 Soil For Site Formation The soil used for backfilling shall be original clean earth and the topmost 600mm shall be soil with

clay content of not more than 45%. 4.1.2 Soil Scarification For Compacted Site The top layer shall be scarified or loosened to 100mm deep for the whole Site and graded to fall

towards drains or as instructed by the Superintending Officer’s Representative all at the Contractor’s cost and expense.

4.1.3 Site Gradient The Site shall be graded to fall towards drains at a minimum ground gradient of 1 in 70 or as

instructed by the Superintending Officer’s Representative all at the Contractor’s cost and expense. 4.2 SOIL MIXTURE The soil mixture shall be 3 parts of topsoil with 1 part of soil conditioner and 1 kg per m3 of compound

fertilizer NPK (15:15:6.4) or 4:2:1 subsoil, unwashed sand and soil conditioner with 1 kg per m3 of granular fertilizer NPK (15:15:6.4). Provide and spread the required amount of topsoil for such turfing and tree planting works.

All topsoil shall be of good quality, free from rubbish, roots, stumps, subsoil or other extraneous

matter, be friable and porous in texture. The texture content shall be 40-50% sand, 20-25% clay and 20% approved organic matter.

Soil conditioner shall be peat, cocopeat, organic compost; or other approved fibrous organic matters

suitable for mixing with soil to make a friable growing medium for plants. 4.3 PLANT SOIL In the event that the Contractor is unable to obtain the necessary top soil of the quality acceptable to

the SO Rep from any source, subject to the approval of the SO Rep, plant soil may be provided as a substitute for top soil. Provide, mix and use the plant soil for the Works.

Manufacture the plant soil by mixing 4 parts of sub-soil, 2 parts of unwashed sand and 1 part of soil

conditioner and 1 kg per m3 of compound fertilizer NPK (15:15:6.4) to achieve a thorough and homogenous mix relatively free of lumpy material. The mixing may be carried out by spreading the various components on the ground in layers and ploughing and mixing them using appropriate machinery or by using a mixer or by any other process. The resulting plant soil shall be relatively free of lumpy material and shall have the following range of composition by weight :

Sand 40% to 70% Clay 10% to 25% Organic Matter 2% to 5%

Demo Spec Page 4-2


4.3 PLANT SOIL (CONT'D) (a) Sub-Soil The clay content of the sub-soil which is the soil strata found just below the top soil layer, shall

not be greater than 45%. Only approved sub-soil shall be utilised for the production of the plant soil.

(b) Unwashed Sand Provide the unwashed sand required for the manufacture of plant soil. The unwashed sand to

be used shall be free of any debris, stones or other foreign material. The unwashed sand delivered to the Site shall be rejected it if fails to meet this requirement and shall be immediately removed from the Site. Neatly store all acceptable unwashed sand on the Site prior to their use.

4.4 PLANTING TURF Provide a layer of minimum 125mm thickness of approved top soil mixture containing a large

percentage of humus, free from hard granular materials, weeds and other undesirable matter, evenly spread over the Site or as directed by the Superintending Officer's Representative, followed by the planting of fresh turf.

The type of grass used for turfing shall be Cow Grass (Axonopus Compressus). All turf supplied by the Contractor shall be of healthy and vigorous stock of approved type and quality,

free from pests or diseases. The turfing shall be cut square and approximately 300mm x 300mm in area, and the sod, a minimum 25mm thickness. All turf supplied shall be free from weeds especially Mimosa Pudica.

When required, submit for approval a sample of the grass whenever an area is to be turfed. Sods

shall be laid within 24 hours upon delivery to avoid desiccation of the turf. Close turfing shall apply to all of the turfing area. Sods shall be firmly sunken into ground with their

edges in contact but without stretching or overlapping or gap, in brick-like patterns. Water turf immediately after planting until turf is thriving.

Thereafter, apply compound fertilizer once every 3 months. The compound fertilizer shall be of

approved type and the application rate shall be 10g to 15g per m2. All earth slopes when specified to be closed turfed shall be carried out as soon as possible in order to

ensure rapid growth of protective grass. Provide and fix the turf promptly after laying the topsoil in order to prevent erosion thereof due to wet weather or other causes. Make good any loss of unprotected or inadequately protected topsoil. On slopes steeper than 1 in 2, peg down each sod properly.

4.5 ROLLING OF TURF When the level of the completed turf is undulating or uneven, the turfed area except those on steep

slope shall be properly rolled out with a suitable garden roller of weight not more than 150kg or other approved means. The turfing shall give a uniform even surface on completion. Rolling shall be carried out when the turf is established after the second grass cutting.

Demo Spec Page 4-3


4.6 MAINTENANCE OF TURFING WORKS The Contractor shall allow in the Contract Sum for all costs and expenses for providing maintenance

services, as specified hereunder, to the turfing Works during the Time for Completion and any time period where liquidated damages are imposed under the Contract, and for a further period of six months commencing from the Date of Substantial Completion for the Works or phase or sub-phase of the Works as certified by the Superintending Officer (hereinafter referred to as the "Maintenance Period" for the purposes of this clause including all subclauses under it) by providing and/or performing the following :

(a) Watering with a volume of 10 litres per m2 daily for the first two weeks after planting and when necessary or as directed by the Superintending Officer’s Representative;

(b) Weeding where and when necessary or as directed by the Superintending Officer’s

Representative;

(c) Replacing dead turf or re-turf bare areas;

(d) Fertilising before handing over, and on the 3rd and 6th month of the Maintenance Period.

(f) Cutting grass fortnightly. Before necessary grass cutting, manually remove all weeds and undesirable vegetation growing in the

turfed areas. Close cut grass as short as possible following the general contours of the ground. The stock or blade of the grass after each cutting shall not stand higher than 20mm above the ground level. Approved mechanical cutters of various capacities to suit site conditions shall be utilised to cut the grass. Remove all cut grass from Site.

Cut back the edges of all sidetables and other turfed areas adjoining roadways, footpaths, kerbs,

dividers and concrete paved areas to proper straight lines or curves as the case may be, and trim thereafter to produce a neat and tidy appearance. Carry out this work immediately after the grass in the area has been cut or manually weeded out and clear. Cut and manually weed out and clear grass growing in the joints of footpaths, scupper drains, etc.

If the Contractor fails to maintain the turf, the Employer shall have the right to engage his own

workmen or other contractors to carry out such work and the cost incurred shall be recovered from the Contractor. In addition, the Superintending Officer's Representative shall exercise its right under the Nuisance and Irregularities clause to impose charges against the Contractor.

4.7 SAFETY MEASURES FOR GRASS-CUTTING MACHINES (a) Take every safety precaution to eliminate danger to his workmen, the general public and the

property of others. (b) All mechanised driven or walk behind grass-cutting machines used shall be installed with

suitable protective guards of steel or other approved materials to eliminate splinters and flung-off objects from causing damage. Under no circumstances shall the protective guards be removed from machines in operation.

(c) The Contractor shall not use open blade rotary machine. Hand held rotary grass cutters shall

be of the nylon cord type. (d) The grass-cutter shall wear safety boots, goggles, helmets and safety vest. When these safety

requirements are not complied with, the Contractor's foreman or the Superintending Officer's Representative shall instruct the grass-cutter to stop work.

(e) Before grass-cutting commences, the public shall be kept at least 10 metre radially away from

the grass-cutter and a signboard shall be erected on Site with the wordings "DANGER", KEEP OFF, Grass Cutting Works In Progress".

(f) The grass-cutting blade shall be securely fixed to the machine. When the machine is in

continuous use, regular checks shall be made. The blade shall be kept in good condition. A worn-out blade shall be replaced immediately.

(g) The bolts and nuts which are fastened to the cutter blade shall be checked before the

machines are operated to prevent the blade from flying off.

Demo Spec Page 4-4


4.8 USE OF NON-POTABLE WATER The Contractor shall allow in the Contract Sum for all costs and expenses incurred in the collection,

storage, transportation and use of non-potable water, when directed by the SO Rep, for watering turf, trees and shrubs. Non-potable water can be collected free of charge from the PUB Water Reclamation Plants. These Water Reclamation Plants are located at :

(a) Ulu Pandan Water Reclamation Plant

(b) Kim Chuan Water Reclamation Plant

(c) Seletar Water Reclamation Plant

(d) Kranji Water Reclamation Plant

(e) Bedok Water Reclamation Plant

(f) Jurong Water Reclamation Plant

The Contractor shall use water tankers or water-tight tanks mounted on trucks to collect the non-

potable water from any of the above ENV Sewage Treatment Works. The tank is preferred to have a minimum capacity of 9000 litres. The Contractor must also ensure that unused non-potable water is returned to the Sewage Treatment Works for proper disposal and not discharged into open drains in water catchment areas.

The Contractor shall submit detailed particulars of their water tankers or tank mounted trucks to the

Superintending Officer’s Representative who will then obtain an authorization letter from ENV for the registered tanker to collect non-potable water.

The Contractor shall submit detailed justifications to the Superintending Officer’s Representative for

not using non-potable water for watering turf, trees and shrubs, after direction has been given by the Superintending Officer’s Representative to do so.

APPENDIX/...

DEMO13/APPENDIX.DOC(1) oym(151212) (DPG)

APPENDIX I

(SPECIMEN)

STATEMENT OF UNDERTAKING

HOUSING & DEVELOPMENT BOARD c/o __________________________________________ (Name of Consultant) _____________________________________________ (Address of Consultant) _________________________________________ ______________________________________________

Section I : To be completed by Contractor

PARTICULARS OF DEMOLITION WORKS

Contract No. :

Description of Demolition Works :

Building Block No. :

Address :

Remarks :

I, (the Contractor) for the abovesaid Works undertake to execute the Works in accordance with all the provisions in the Building Control Act and Regulations and hereby engage the undermentioned Professional Engineer in furtherance with Clause 1.3.5 of the General Specification for the whole duration of the Contract. Contractor's Signature & Stamp Address :

Singapore ( ) Date :

Section II : To be completed by the Professional Engineer

I hereby certify that I will supervise the demolition works diligently and that such works will be carried out in accordance with the provisions of the Building Control Act, 1989, the current Code of Practice on Demolition, SS 557 and also in compliance with the provisions of the BS-6187-1982.

Signature & Stamp of Professional Engineer :

Name & Address of Professional Firm :


APPENDIX II

(SPECIMEN)

LETTER OF UNDERTAKING To: HOUSING & DEVELOPMENT BOARD

c/o ____________________________ (Name of Consultant)

____________________________ (Address of Consultant)

____________________________

____________________________

LETTER OF UNDERTAKING IN CONNECTION WITH DEMOLITION WORKS

JOB SITE:

CONTRACT NO. 1 With reference to the above demolition contract, I/We

of

hereby undertake to excavate all existing ground beams, basement, footings and other forms of foundation works, refilling excavated earth, levelling and carting away all debris and surplus earth from the job site. 2 We also understand that the HDB reserves the right to engage other person(s) or contractor(s) to complete the outstanding works if the outstanding works are not completed within fourteen (14) days from the date of written notification by the HDB, and all cost and expense incurred shall be recovered from us, including administrative charges based on prevailing guidelines set by HDB. 3 In addition, we understand that we may be restricted from tendering HDB's project or/and debarred from participating in all public sector tenders in all lines of business in accordance with existing Government guidelines, should we fail to meet the conditions of this undertaking. Yours faithfully Contractor's Authorised Signature/Company's Stamp Date : Address :

Singapore ( )


APPENDIX III

(SPECIMEN)

Date : Tel : Fax : 64902160 Email :

Resident/Tenant Apartment Block Singapore ( ) Dear Sir/Madam NOTIFICATION OF DEMOLITION WORKS 1 HDB will be carrying out demolition work to your nearby Apt Block

from to . The Contractor undertaking the demolition works is

.

2 Before the commencement of work, hoarding will be provided around the demolition site. Directional as well as warning signboards will also be put up where necessary. We would like to seek your co-operation to advise your children to keep clear from the areas where works are being carried out. 3 During the progress of the work, it is inevitable that noise and dust will be generated. Access to the nearby blocks may also be diverted for safety reasons. However, please rest assured that the HDB would do the utmost to complete the project expeditiously and minimise any inconvenience caused to you. Should you have any feedback on noise and dust nuisance, please call at telephone no. . 4 We thank you for your co-operation and understanding and apologise for any inconvenience caused. Yours faithfully for ____________________________ (Name of Consultant)

____________________________

____________________________

END/.....

std specifications - demolition - 2013 [unlocked by www.freemypdf.com]

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