moh-mowe potable water.pdf

7/21/2019 MOH-MOWE Potable Water.pdf

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Table of Contents

Page

PART 1: GENERAL REQUIREMENT ..................................... 1

SECTION 1.01 FORMAT AND REFERENCING .............................................. 1

1.01.1 FORMAT OF SPECIFICATIONS ......................................................... 11.01.2 REFERENCING ..................................................................................... 2

SECTION 1.02 ABBREVIATIONS AND DEFINITIONS OF TERMS ............. 3

1.02.1 ABBREVIATIONS ................................................................................... 3

1.02.2 DEFINITIONS .......................................................................................... 6

SECTION 1.03 SCOPE AND CONTROL OF WORKS .................................. 8

1.03.1 INTENT OF CONTRACT ........................................................................ 8

1.03.2 SILENCE OF SPECIFICATIONS ......................................................... 81.03.3 CONTRACTOR'S WORK AREAS ........................................................ 81.03.4 WATER SUPPLY .................................................................................... 9

1.03.5 ELECTRICITY SUPPLY ......................................................................... 9

1.03.6 EXISTING UTILITIES AND OTHER OBSTRUCTIONS ................... 10

1.03.7 SIGN BOARDS .................................................................................... 14

1.03.8 SURVEYING EQUIPMENT .................................................................. 14

1.03.9 SETTING OUT OF WORKS ............................................................... 15

1.03.10 HAUL ROUTES FOR HEAVY VEHICLES ....................................... 16

1.03.11 SCAFFOLDING AND FALSEWORK ................................................ 17

1.03.12 USE OF EXPLOSIVES ..................................................................... 17

1.03.13 FIRE FIGHTING EQUIPMENT ......................................................... 18

1.03.14 PHOTOGRAPHIC RECORDS OF CONSTRUCTION ...................... 18

1.03.15 SITE CLEANING AND FINAL CLEAN UP ...................................... 19

SECTION 1.04 TEMPORARY WORKS .......................................................... 20

1.04.1 SCOPE ................................................................................................. 20

1.04.2 DESIGN REQUIREMENTS ................................................................ 201.04.3 AGREEMENT OF PROPERTY OWNERS .......................................... 20SECTION 1.05 CONTROL OF MATERIALS AND STANDARDS FOR

SAMPLING AND TESTING ............................................................................ 21

1.05.1 STORAGE OF MATERIALS ............................................................... 21

1.05.2 HANDLING MATERIALS ...................................................................... 21

1.05.3 MATERIALS SUPPLIED BY EMPLOYER ........................................... 21

1.05.4 LOCAL MATERIAL SOURCES ............................................................ 21

1.05.5 SOURCES OF SUPPLY AND QUALITY REQUIREMENTS ............ 221.05.6 CERTIFICATES OF GUARANTEE AND PRODUCTION PLANT

INSPECTIONS .................................................................................................. 22

1.05.7 SAMPLING AND TESTING PROCEDURES ..................................... 22

1.05.8 SAMPLING AND TESTING STANDARDS ........................................ 24

1.05.9 UNACCEPTABLE MATERIALS ......................................................... 25


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SECTION 1.06 CONTRACTOR'S PLANT AND EQUIPMENT .................... 26

1.06.1 GENERAL .......................................................................................... 261.06.2 CONTRACTOR'S SCHEDULE OF PLANT AND EQUIPMENT ........ 26

1.06.3 PROVISION AND USE OF PLANT AND EQUIPMENT .................. 26

SECTION 1.07 MEASUREMENT PROCEDURES ..................................... 271.07.1 GENERAL .......................................................................................... 27

1.07.2 MANUFACTURED ITEMS ............................................................... 271.07.3 FITTINGS AND ACCESSORIES ....................................................... 27

1.07.4 WEIGHT MEASUREMENTS ........................................................... 281.07.5 LINEAR AND AREA MEASUREMENTS ........................................... 28

1.07.6 VOLUME MEASUREMENTS IN VEHICLES ................................... 281.07.7 EARTHWORK VOLUME MEASUREMENTS .................................. 29

SECTION 1.08 TEMPORARY FACILITIES .................................................. 301.08.1 GENERAL .......................................................................................... 30

1.08.2 TEMPORARY SITE FACILITIES ..................................................... 311.08.3 CONTRACTOR'S TEMPORARY BUILDINGS ................................ 32

1.08.4 TEMPORARY SERVICES ............................................................... 32

1.08.5 DIVERSION OF PUBLIC UTILITY SERVICES ............................... 33SECTION 1.09 SAFETY PRECAUTION MEASURES ................................. 35

1.09.1 GENERAL .......................................................................................... 35

PART 2: EX CAVATION A ND B ACK FIL L ING .......................... 36SECTION 2.01 SCOPE ............................................................................... 36

SECTION 2.02 SITE CLEARING ................................................................. 37

2.02.1 CLEARING AND GRUBBING ............................................................... 372.02.2 REMOVAL OR REALIGNMENT OF OBSTRUCTION AND

UTILITIES .................................................................................................... 37

SECTION 2.03 EXCAVATION .................................................................... 382.03.1 GENERAL .......................................................................................... 38

2.03.2 TOP SOIL ......................................................................................... 382.03.3 EXCAVATING .................................................................................... 38

2.03.4 DISPOSAL OF MATERIALS ............................................................. 41

2.03.5 ROCK EXCAVATION ............................................................................ 412.03.6 ROAD EXCAVATION (FOR PREPARATION OF SERVICE ROADS

ALONG PIPELINES) ................................................................................... 422.03.7 EXCAVATION FOR STRUCTURES ................................................ 46

2.03.8 EXCAVATION FOR PIPE TRENCHES ............................................. 49

2.03.9 Technical Specifications of Thrust Boring ............................................ 52SECTION 2.04 SOIL FILLING AND BACKFILLING FOR STRUCTURES 57

2.04.1 SCOPE ..........................................................................................57

2.04.2 FILLING MATERIAL AND BORROW MATERIAL .........................57

2.04.3 BACKFILLING FOR STRUCTURES ..............................................58

2.04.4 EMBANKMENT CONSTRUCTION ...............................................63

2.04.5 PIPE BEDDING MATERIAL AND BACKFILLING FOR PIPE

TRENCHES................................................................................................. 70


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SECTION 2.05 SUBGRADE CONSTRUCTION ........................................... 74

2.05.1 GENERAL .............................................................................................. 74

2.05.2 MATERIALS .......................................................................................... 74

2.05.3 WORKMANSHIP ................................................................................... 75

SECTION 2.06 GABIONS ................................................................................ 772.06.1 GENERAL .............................................................................................. 77

2.06.2 MATERIALS .......................................................................................... 77

2.06.3 CONSTRUCTION .................................................................................. 78SECTION 2.07 STONE PITCHING IN CONCRETE ...................................... 79

2.07.1 GENERAL .............................................................................................. 79

2.07.2 MATERIALS .......................................................................................... 79

2.07.3 PLACING .............................................................................................. 80

SECTION 2.08 GEOTEXTILES ....................................................................... 81

2.08.1 GENERAL .............................................................................................. 81

2.08.2 MATERIAL ........................................................................................... 81

2.08.3 WORKMANSHIP ................................................................................... 82

PA RT 3: PAVEMENT AND ROADS SURFACE FINISHING ....... 83SECTION 3.01 SCOPE .................................................................................. 83

SECTION 3.02 GRANULAR SUBBASE AND BASE COURSES .................. 84

3.02.1 GENERAL .............................................................................................. 84

3.02.2 MATERIALS ............................................................................................. 85F.4 The percent passing no. 200 sieve (0.075 mm) shall not be more than half

the percent passing sieve no. 40 (0.025 mm) ................................................ 87

3.02.3 CONSTRUCTION .................................................................................. 87SECTION 3.03 BITUMINOUS LAYERS ........................................................ 89

3.03.1 GENERAL ................................................................................................. 893.03.2 MATERIALS AND REQUIREMENTS FOR BITUMINOUS

COURSES ....................................................................................................... 89

3.03.3 CONSTRUCTION .................................................................................... 93SECTION 3.04 PAVEMENT REPAIRS AND TRENCH REINSTATEMENT

WORKS 96

3.04.1 GENERAL ...........................................................................................96

3.04.2 ASPHALTING .....................................................................................96

3.04.3 MATERIALS .......................................................................................973.04.4 CONSTRUCTION AND REPAIR WORKS .......................................97

SECTION 3.05 CURBS, GUTTERS, SIDEWALKS AND PAVED MEDIANS100

3.05.1 GENERAL ............................................................................................ 100

3.05.2 MATERIALS AND PRECAST MANUFACTURE ............................. 100

3.05.3 CONSTRUCTION AND INSTALLATION ........................................... 102SECTION 3.06 MAINTENANCE OF TRAFFIC AND DETOURS ................ 109

3.06.1 GENERAL ............................................................................................ 109

3.06.2 MAINTENANCE AND PROTECTION OF TRAFFIC ....................... 109


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PART 4: PIPE WORKS AND NETWORK ACCESSORIES ......... 112SECTION 4.01 SCOPE ............................................................................... 112

SECTION 4.02 GENERAL REQUIREMENTS ........................................... 1134.02.1 GENERAL ........................................................................................... 113

4.02.2 SEQUENCE OF CONSTRUCTION .................................................. 1134.02.3 RIGHT OF WAY (ROW) .................................................................... 114

4.02.4 MATERIALS, PRODUCTS SUPPLY AND HANDLING ................. 115

SECTION 4.03 PIPES, FITTINGS AND ACCESSORIES ......................... 121

4.03.1 MATERIALS........................................................................................ 121

4.03.2 CONSTRUCTION AND INSTALLATION .......................................... 130

4.03.3 PIPE WORK TESTING ...................................................................... 1334.03.4 CATHODIC PROTECTION .............................................................. 140SECTION 4.04 VALVES, GATES, STOPS, WATER CONECTION S FIRE

HYDRANTS AND SUNDRY WORKS ......................................................... 150

4.04.1 GENERAL ........................................................................................... 150

4.04.2 VALVES ............................................................................................ 150

4.04.3 FIRE HYDRANTS ............................................................................. 158

4.04.4 HOUSE CONNECTION ................................................................... 1614.04.5 JOINTING MATERIALS AND ADAPTORS ...................................... 165

4.04.6 VALVE ACCESSORIES .................................................................... 167

4.04.7 VALVE OPERATORS ........................................................................ 169

4.04.8 CONSTRUCTION AND INSTALLATION .......................................... 170SECTION 4.05 BEDDING, SURROUND, HAUNCHING, ENCASEMENT

AND THRUST BLOCKS .............................................................................. 1734.05.1 GENERAL ........................................................................................... 173

4.05.2 MATERIALS........................................................................................ 1734.05.3 WORKMANSHIP ................................................................................ 173

SECTION 4.06 CHAMBERS AND INLETS ................................................ 175

4.06.1 GENERAL ........................................................................................... 175

4.06.2 MATERIALS........................................................................................ 175

4.06.3 CONSTRUCTION AND INSTALLATION .......................................... 177

SECTION 4.07 RECORDS .......................................................................... 178

PART 5: CONCRETE WORKS ........................................... 180

SECTION 5.01 CONCRETE AND CONCRETE MIXES AND TESTING ... 1805.01.1 GENERAL ........................................................................................... 180

5.01.2 MATERIALS........................................................................................ 1805.01.3 DEFINITIONS ..................................................................................... 193

5.01.4 CONCRETE STRENGTH REQUIREMENTS ................................... 195

5.01.5 COMPOSITION OF CONCRETE .................................................... 199

5.01.6 REQUIREMENTS FOR COMBINING MATERIALS ...................................................................................................................................... 201

5.01.7 READY-MIXED CONCRETE AND CENTRAL MIXED CONCRETE205

SECTION 5.02 CONCRETE HANDLING, PLACING AND CURING ......... 208


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5.02.1 GENERAL ............................................................................................ 208

5.02.2 MATERIALS ........................................................................................ 208

5.02.3 PLACING ........................................................................................... 208

5.02.4 COMPACTING ................................................................................... 213

5.02.5 CURING ............................................................................................. 2165.02.6 HOT WEATHER CONCRETING ...................................................... 219

5.02.7 COLD WEATHER CONCRETING ..................................................... 222

5.02.8 NIGHT CONCRETING ........................................................................ 223SECTION 5.03 STEEL REINFORCEMENT AND FIXING ........................... 224

5.03.1 GENERAL ............................................................................................ 224

5.03.2 MATERIALS ........................................................................................ 224

5.03.3 CONSTRUCTION ............................................................................... 225

SECTION 5.04 FORMS, FORMWORK AND FALSEWORK ....................... 229

5.04.1 GENERAL ........................................................................................229

5.04.2 DEFINITIONS ..................................................................................229

5.04.3 MATERIALS ....................................................................................230

5.04.4 DESIGN ...........................................................................................231

5.04.5 FINISHES ......................................................................................235

5.04.6 TOLERANCES ................................................................................237

5.04.7 CONSTRUCTION REQUIREMENTS ..........................................237

5.04.8 REMOVAL OF FORMWORK AND FALSEWORK ......................239

SECTION 5.05 PLAIN AND REINFORCED CONCRETE STRUCTURES 240

5.05.1 GENERALLY ....................................................................................... 240

5.05.2 MATERIALS ........................................................................................ 2405.05.3 CONSTRUCTION ............................................................................... 241

SECTION 5.06 WATERPROOFING FOR STRUCTURES ........................ 2465.06.1 GENERAL ............................................................................................ 246

5.06.2 MATERIALS ........................................................................................ 246

5.06.3 SURFACE PREPARATION .............................................................. 250

5.06.4 INSPECTION, DELIVERY AND STORAGE .................................... 250

5.06.5 CONSTRUCTION ............................................................................... 251

SECTION 5.07 JOINT SEALING AND JOINT FILLER ................................ 255

5.07.1 GENERAL ............................................................................................ 255

5.07.2 MATERIALS: JOINT SEALING COMPOUNDS .............................. 2555.07.3 PREFORMED EXPANSION JOINT FILLER ................................... 258

5.07.4 CERTIFICATE OF GUARANTEE ...................................................... 258

5.07.5 CONSTRUCTION ............................................................................... 259


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Made with Ordinary Portland Cement ...............................................239

List of TablesPage

PART 2 : EXCAVATION AND BACKFILLING

Table 2.1 : Soil Suitable for Embankment .....................................................................64Table 2.2 : Rock Suitable for Embankment ...................................................................64

PART 3 : PAVEMENT AND ROADS SURFACE FINISHING

Table 3.1 : Job Mix Formula ...........................................................................................92

Table 3.2 : Surface Tolerances .....................................................................................92

Table 3.3 : Tests for Bituminous Pavements: Minimum Tests Required ........................95

PART 5 : CONCRETE WORKS

Table 5.1.1 : Limits of Gradation for Coarse Aggregates .............................................188

Table 5.1.2 : Limits of Gradation for Combined Aggregates .......................................... 189

Table 5.1.3 : Maximum Permitted Impurities in Non-Potable Water .............................. 192

Table 5.1.4 : Concrete Class and Design Mixes ...........................................................195Table 5.1.5 : Grading for No-Fines Concrete ................................................................196

Table 5.1.6 : Preliminary Tests for Stretch ....................................................................197

Table 5.2.1 : Selection of Poker Diameter for Size of Pour ........................................... 215

Table 5.2.2 : Normal Curing Periods .............................................................................220

Table 5.4.1 : Permitted Hardwoods for Load-Bearing Wedges and Packing ................. 230Table 5.4.2 : Minimum Period Before Striking for Ordinary Structural Concrete


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PART 1: General Requirement Technical Specification for Water Network

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PART 1: GENERAL REQUIREMENT

SECTION 1.01 FORMAT AND REFERENCING

1.01.1 FORMAT OF SPECIFICATIONS

A. Part

A.1 This Specification is divided into Parts. Each Part is designated by a single ordouble digit number followed by a title. (Part 1 General Requirements)

B. Section

B.1 Each Part is divided into Sections. Each Section is designated by the Partnumber, a decimal point and a 2-digit sequential number, followed by a title.(Section 1.01 Format and Referencing)

C. Subsection

C.1 Each Section is divided into Subsections. Each Subsection is designated by thePart number, a decimal point and a 2-digit Section number, a decimal point and asingle or double digit number followed by a title. (1.01.1 Format of Specifications)

D. Clause

D.1 Each Subsection may be divided into Clauses. Each Clause is designated bysequential alphabetic letters and a decimal point. (D.)

E. Item

E.1 Each Clause may be divided into items. Each Item is designated by the Clauseletter, a decimal point and a single or double digit sequential number, followed (ifrequired) by a title in lower case lettering. The text then normally follows on thesame line (E. 1).


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1.01.2 REFERENCING

A. The Specifications for Items in the Bills of Quantities are prescribed in therespective Section/s corresponding to the type of Works involved.

B. Al l the provisions of these Section/s shall be construed as Specifications for suchItems of Work, except in respect of those provisions clearly inapplicable in thecontext in which they appear or unless they are waived or modified in the ContractDocuments or by Variation Orders.

C. Specifications and Drawings may contain cross references to other Sections,Clauses, Items, etc., which shall likewise be construed as Specifications for the

Item of Work involved.

D. Any references in the Specification to Work or materials not required wi l l bedeemed inapplicable.


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SECTION 1.02 ABBREVIATIONS AND DEFINITIONS OF TERMS

1.02.1 ABBREVIATIONS

A. Interpretation

A.1 Wherever the following abbreviations of titles, terms and units of measurement areused in the Specifications or on the Drawings, the intent and meaning shall beinterpreted as described hereunder.

B. Titles and Terms

B.1AASHTO - American Association of State Highway and Transportation Officials:

ABS

ACI

AISC

AISI

ANSI

API

ASTM

AV.

AWG

AWS

AWWA

bit.

BS

BSSC

BST

CB

CBR

conc

CIE

DBSC

DIN

Equiv

FSS

hwy

ht

H:V

IEC

IEE

Acrylonitrile-Butadiene-Styrene

American Concrete Institute

American Institute of Steel Construction

American Iron and Steel Institute

American National Standards Institute American Petroleum Institute American Society for Testing and

Materials

average

American wire gauge

American Welding Society

American Water Works Assoication

bitumen/bituminous

British Standard

bituminous slurry seal coat

bituminous surface treatment circuit breaker California Bearing Ratio

concrete

Commission Internationale de l'Eclairage

double bituminous seal coat

Deutsches Institute Fur Normalizieung

equivalent

Federal Standard Specification (USA)

highway

height

horizontal:vertical

I

nternational Electrical CommissionI nstitution of Electrical Engineers (UK)


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ISO :

L.L. :

L.S. : max :

MCCB :

min : MUTCD :

NEC :

NEMA :

NJB :

pav't :

P.C. :

PCC :

PE :

P.I. :

P.L. : PTFE :

qty :

RC :

RCP :

rdwy :

ROW :

SBSC :

S.G. :

SI :

Sta : SWG :

TBSC :

VDE :

wgt :

GRP :

DI :

SASO :

International Organization for Standardization

liquid limit

lump sum

maximum

molded case circuit breaker

minimum (or minute)

Manual on Uniform Traffic Control Devices

National Electrical Code (UK)

National Electrical Manufacturers' Association (USA)New Jersey barrier

pavement

prime cost

Portland cement concretepolyethylene

plasticity index

plastic limit

Polytetrafluoroethylenequantity

reinforced concrete

reinforced concrete piperoadway

right-of-way

single bituminous seal coatspecific gravity

Systeme International D'Unites

Station (location along a survey line)

standard wire gauge (UK) triple bituminous seal coat

Verband Deutscher Electrotechniker

weight

Class reinforced plasticDuctile IronSaudi Arabia Standards Organization

C. Units of Measurement

C.1 Throughout the documentation units of measurement are referred to by symbols asfollows:

- Nr : number- mm : millimeter/s

- cm : centimeter/s

- m : meter/s

- lin.m : linear meter/s

- km : kilometer/s


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sq.mm :

sq.cm :

sq.m

ha

cu.m

gm kg tonne :

ml

ltr

Pa

N

kN

MN

A :

mA :

V :

W :

kW :

C

Hz

rpm

km/h

sec

min

h mS

dB

dBA

ppm

in.

ft :

sq.in :

sq.ft :

cu.ft

lb.

psi

gal

gal(Imp)

mph

HP

USG

square millimeter/s

square centimeter/s

square meter/shectare/s

cubic meter/s

gram/s

kilogram/s

metric ton (1,000 kg)milliliter/s

liter/s

Pascal/s

Newton/s

kilo Newtonsmega Newtonsamperes

mi ll i amperesvolt/s

Watt

kilowatt

Celsius (Centigrade)

Hertz (Frequency)revolutions per minutekilometers per hour

seconds

minute/s (or minimum)

hour/s

mil li Siemensdecibel/s

decibels absolute parts permillion

inch/inches (1 in. = 25.4 mm)foot/feet (1ft = 0.3048 m)square inch/inches

square foot/feet cubicfoot/feet pound/s

(weight) pounds persquare inch gallon/s(U.S.) gallon/s (Imperial)

miles per hourhorsepower

American gage


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1.02.2 DEFINITIONS

A. Wherever in the specification or in other Contract Documents any of the followingterms is used, the intent and meaning shall be interpreted as follows:

ACCEPTED - Accepted in writing by the Engineer (or by the Employerwhere appropriate) as meeting the requirements of the Contract Documentsand of any authorized variations thereto. "Acceptance" means accepted inwriting as aforesaid. "Acceptable" means acceptable to the Engineer asaforesaid.

ADDENDUM/NOTICE - Amendment of or revision to any of the ContractDocuments issued to Tenderers, and which is deemed to form part of theContract Documents.

APPROVED - Approved in writing by the Engineer, including subsequentwritten approval or confirmation of previous verbal approval by theEngineer. "Approval" means approval in writing as aforesaid.

CERTIFICATE OF GUARANTEE - A signed statement by a person havinglegal authority to bind a company or supplier to its product, and whichconfirms that the materials and test results conform to the standards of theseSpecifications.

DIRECTED - Directed in writing by the Engineer, including subsequentwritten direction or confirmation of previous verbal direction by theEngineer.

PRESPLITTING - Establishment of a free surface, or shear plane, in rockcuts, by controlled use of explosives in specially aligned and closely spaceddrill holes along the slope line.

SHEATHING - Backfilling to the inside faces of structures such asretaining walls and abutments, using proprietary filter cloth and porousblocks, or using selected, free-draining material such as gravel or non-

cementitious sand, etc, prior to placing and compacting normal backfill.

SOIL STABILIZATION - Procedure whereby cement, bitumen or lime isadded to soils (subgrade layer) or to granular materials (sub-base course) inorder to improve their load bearing capacity and their resistance toweathering and displacement.

SUBGRADE - The top surface of embankment or excavated area on whichthe pavement structure and shoulders are constructed. Also referred to asSubgrade Surface or Subgrade Level.


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SUBGRADE LAYER - The top layer of material, of at least 200 mmcompacted thickness, immediately below the subgrade surface.

SUBSIDIARY WORKS - Works which are subsidiary to or necessary oressential to, or in support of, or usual to, the execution and completion of

other Works.

WORKING DRAWINGS - Shop drawings, steel bending schedules, stresssheets, fabrication and erection drawings, falsework drawings, and any othersupplementary drawings or data which the Contractor is required to submit tothe Engineer for approval, generally before such Works commence.


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SECTION 1.03 SCOPE AND CONTROL OF WORKS

1.03.1 INTENT OF CONTRACT

A. The intent of the Contract is to provide for the construction and completion in everydetail and subsequent maintenance of the Works described. The Contractor shallfurnish all labor, materials, tools, equipment, transportation, supplies and facilitiesand shall carry out all Permanent and Temporary Works and all other itemsnecessary for proper completion of the Works in accordance with all requirementsof the Contract Documents.

B. Where the Specifications or Drawings describe any portions of the Works in outline

only, and not in complete detail, the best general engineering practice shall prevailand only first quality materials and workmanship shall be used.

1.03.2 SILENCE OF SPECIFICATIONS

A. The apparent silence of the Specifications, Drawings or other Contract Documentsas to any detail or the apparent omission from them of a detailed descriptionconcerning any Works or requirements, shall be regarded as meaning that good

engineering practice shall apply and shall be to the approval of the Engineer.

1.03.3 CONTRACTOR'S WORK AREAS

A. The Contractor shall make all necessary arrangements, including payment i f needbe, regarding any land outside the Site that may be needed as work areas. TheEmployer will not acknowledge any liability in respect of such land. The Contractorshall also be responsible for insuring that all roads and temporary facilities needed

are sufficient to divert traffic adequately.

B. The Contractor shall locate and select sites outside the right-of-way for the use ofhis plant, equipment, site offices, residences, Temporary Works or any other useswhich are essential during the execution of the Contract. The Contractor shall takethe necessary measures for using these sites and shall be responsible for allexpenses that may become due in return for such use. Prior to using any landowned by public or private owner outside the Site, the Contractor shall obtain theapproval of the concerned Authorities and the Engineer.


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C. The Contractor, i f so required by the Engineer, whether before or after completionof the Works, shall remove his constructional plant and duly clean the site and shall,wherever applicable, remedy all damage and pay all monies due to land owners inreturn for using their land.

D. It is the Contractor's responsibility to verify the stability of side slopes in cut areasby specialized staff. The Contractor, at his own expense shall execute any requiredsite investigation prior to cutting in the relevant areas. The proposal of siteinvestigation program as well the final recommendation should be approved by theEngineer. No direct payment shall be made for this work, all expenses should beincluded in the Contractor's rates.

E. The Contractor shall inspect the location and the surrounding areas andcomprehend all the details related to the type, nature, details, topography andexisting services of the location.

The Contractor shall acquire all the information related to risks, dangers, weatherconditions and any other related factors that may influence his tender, and no laterconsideration will be made since these expenses should be added by the Contractor on theprices of works and other items.

1.03.4 WATER SUPPLY

A. The Contractor shall be deemed to have executed adequate investigations relatingto the availability of water for the purpose of the Works and to have consulted andarranged with the appropriate Authorities and taken into consideration all legalaspects. The Contractor shall be responsible for the supply of sufficient clean, freshwater at all times during progress of the Works, including making temporaryarrangements for storing and distributing the water on the Site.

1.03.5 ELECTRICITY SUPPLY

A. The Contractor shall make his own arrangements for the supply of all electricalpower and all lighting and electrical equipment required for execution of the Works,including supplies for commissioning engineering services and Plant at requiredvoltages. The Contractor shall also make provisions to store and distribute electricalpower and equipment on Site.


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B. The Contractor shall provide and maintain adequate efficient lighting for all partsof the Works for safety and security purposes required to facilitate proper executionof work and to illuminate surfaces during finishing work and inspection. Withoutprejudice to his liability under the General Conditions of Contract, the Contractorshall, with respect to the supply of electricity for power or lighting, take allnecessary precautions to ensure the safety of his workmen and others.

C. Permanent electric supply and lighting installations may be used for testing andcommissioning and to illuminate the Works, subject to the following conditions:

The Employer does not guarantee that it wi l l be available.

The Contractor must take responsibility for the operation, maintenance andsupervision of the system, indemnify the Employer against all damage andpay all costs and renew all used tubes and lamps.

The Contractor must indemnify the Employer against any reduction in themanufacturer's guarantee periods for equipment etc. due to its use beforecompletion of the Works.

1.03.6 EXISTING UTILITIES AND OTHER OBSTRUCTIONS

A. Categories of Obstruct ions

A.1 Obstructions shall be classified as follows:

Existing private and public owned utilities, above and below ground, whichare required to be either protected, adjusted, relocated or removed.

Obstructions, above and below ground (other than utilities), which arerequired to be taken down, dismantled, demolished or excavated, and

removed, as appropriate.

B. Existing Utilities

B.1 Utilities shall include, but not be limited to, existing water lines, gas lines, sewerlines, wire lines, service connections, water and gas meters and valve boxes, lightpoles and masts, pylons, cableways, signals, and all utility appurtenances withinthe limits of the proposed construction.


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B.1.1 The Contractor shall submit all plans showing existing utilities under earth andtheir relations with pipelines under construction.

B.1.2 The Employer/Engineer takes no responsibility as to the correctness, accuracy,

completeness or validity of information obtained from these Drawings and theContractor shall be fully responsible for his own interpretation and shall executewhatever additional investigations are necessary to obtain the needed informationat the Contractor's own expense.

B.1.3 The costs of all related Works concerning verification and identification of existingutilities including excavating any trial pits, detection means, mapping detailing ofdrawings and co-ordination with respective Authorities shall be fully borne by theContractor. Should any relocation of existing utilities, not previously identified bythe Contractor, be instructed, or shown on the Drawings, these shall not constitute

a change in the Scope of Work, and shall give no grounds for extension to theTime for Completion or for other claims. The relocations, however, will be paid forand valued in accordance with the Contract rates..

B.2 The necessary utility diversions may be specified or directed to be carried out bythe Contractor. Alternatively, the Employer may make arrangements for suchworks to be executed by other parties.

B.3 The Contractor shall:

Take into account that the diversion works shall be carried out to therequirements and approval of the Utility Owners and/or under theirsupervision, and also where required by the Utility Owners, specialistdiversion works shall be carried out by accredited specialist Contractors.

Verify and identify the existing utilities by excavating trial pits and othermeasures including detection means existing utilities. Coordinate with therelevant Authorities and map these utilities and prepare detailed andaccurate existing utilities drawings identifying the utilities that are in service

and those that are dead or abandoned. Submit these existing utilitiesDrawings, that are accurate and detailed giving location of utilities in planand section with all pertinent data of the respective utility, to the Engineerand to the Utility Owners.

Work out and develop, in coordination with the Utility Owners and theEngineer, the approved utilities diversion schemes that will be required toenable the execution of the Works and also maintain continued utilitiesservices in the Area, and to the users.


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B.10 Execution of the water networks diversions should be done as per the waternetworks specifications stipulated in Section (4) of these specifications. Testing,cleaning and disinfection of the pipelines should be done according to Section(4-3-3) of these specifications.

C. Obstacles

C.1 Obstacles shall include, but not limited to existing buildings, walls, fences, gates,wells, septic tanks, manholes, pits, pipes, culverts, roadways, sidewalks, signs andrubbish dumps, whether or not shown on the Drawings.

C.2 At the commencement of the Contract, the Contractor shall examine the Site andidentify/verify all obstacles in the Site above or below ground, and shall record allsuch information on suitable Site Drawings which shall be submitted to theEngineer within one month of commencement date.

C.3

Harmful gases concentration should be monitored using special gas monitoring devicesbefore and during commencing of the work in septic tanks. All laborers entering to thetanks must be provided with full safety tools and gas masks, etc. and the Contractor mustprovide all first aid tools on site.

Existing Septic Tanks:

I f the pipelines or the house connections cross any existing septic tanks and it was notpossible to change the pipeline routing to avoid them, the Contractor should proceed to dry,clean, demolish and backfill those tanks partially or fully.

Wherever possible, only the crossing part of the tank with the water pipeline that will bedemolished and backfilled and the rest of the tank should be separated by building asuitable wall to make the tank in a good working condition. All precautions should betaken to keep the existing system working and to pump the sewerage from the tanks and todispose of the sewage according to the local authorities instructions. The sewer water mustnot be allowed to leak to the water pipelines trenches or the water system.

In case of partial or full demolish, the top slab should be removed either fully or partiallyand the walls should be lowered at least by 1m below the ground level. Filling should beas per the backfilling specifications in this document.

All of the above requirements should be applied to all existing tanks including thoseconstructed during this pipelines contract and those crossing the pipelines.


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C.4

A. Nameboard: The Contractor shall provide suitably sized project nameboards,bearing the names of the Employer and Engineer together with any correspondinglogos, the name of the project, the name of the Contractor and such other names andinformation as the Engineer may request. The design and style of the nameboardshall be submitted to the Engineer for approval prior to fabrication. Nameboards areto be written in English and the local language and erected at suitable locations asdirected by the Engineer. Refer to Section 1.08.2 Item G for the nameboarddetails. As detailed in Section 1.08.2, Item E of the specifications.

Change of Pipeline Rooting Around Tanks:

When existing tank crosses the proposed pipeline, the pipeline routing should be changedi f possible around the tank leaving a 50 cm clear distance between the tank walls and thepipeline. Those pipelines should be covered by plain concrete as per the Engineer

recommendations.

The Contractor should prepare detailed drawings for the tank boundaries that cross thepipeline, showing all the connection details that are required to relocate the pipe around thetank. This drawing should be approved by the Engineer prior to construction.

1.03.7 SIGN BOARDS

B. Each sign board shall be erected in a prominent, approved position. Sign boardsshall be maintained in good order at all times and sign boards and supports shall bedismantled and removed from the site upon completion of the Works.

C. All sign boards are to comply with the requirements of concerned authorities(Municipality/ Ministry of Transport/Traffic Directorate).

1.03.8 SURVEYING EQUIPMENT

A. The Contractor shall provide sufficient and suitable surveying instruments and otherequipment for his own use in setting out and leveling of the Works, and also toenable the Engineer to check the setting out. Furthermore, the Contractor shallprovide sufficient chainmen and other assistance as the Engineer may require.

B. The accuracy of survey instruments may be verified at any time by the Engineerand any unsatisfactory instruments shall be promptly calibrated or removed andreplaced by the Contractor at its own expense.


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C. Upon completion of the Contract, all survey instruments shall remain the property ofthe Contractor, unless a Pay Item for such instruments is included in the Bills ofQuantities, in which case the instruments shall become the property of theEmployer.

1.03.9 SETTING OUT OF WORKS

A. The Contractor shall, prior to any setting out, submit a planned method of operationsfor setting out the Works to the Engineer for his approval. The plan shall include theaccuracy, positions of the various types of stakes, method of marking stakes, andmethods to be used for protecting stakes, etc. No survey work shall proceed without tothe Engineer's approval of the Contractor's plan.

B. The Contractor shall give written notice to the Engineer at least 24 hours before heintends to survey any portion of the Works. Such notice shall include the time,location and type of Works to be set out.

C. Before commencing Work on Site, the Contractor shall carry out a topographicalsurvey of the Site, as directed by the Engineer. This survey shall include such partsof the Site as the Engineer may direct, to record the Site limits, dimensions, groundlevels, obstructions and other features and the survey shall establish base lines andpoints for future setting out and also record the basis for re-measurement of

excavation and earthwork, where applicable. The Contractor shall set out the Works,inform the Engineer when setting out is complete and obtain Engineer's approvalbefore proceeding with construction. The Contractor shall provide instruments andassistance for checking the setting out if required by the Engineer. If, in the opinionof the Engineer, modification of the lines or grade is required, before or after survey,the Engineer will issue detailed instructions to the Contractor who shall revise thesetting out accordingly.

D. Setting Out Utility Works shall be as shown on the Drawings or as instructed on Site.

Stake-out shall be revised if, in the opinion of the Engineer, modifications of line orgrade are required.

E. The Contractor shall be responsible for preserving all existing stakes, marks andmonuments and if any construction stakes or marks are destroyed or disturbed, theContractor shall replace them at his own expense.

E.1 Record Drawings: The Contractor shall record details of all grid lines, existing

ground levels, setting-out stations, bench marks and profiles on the site setting-outdrawing. This drawing shall be retained on the Site throughout the duration of theContract and handed over to the Engineer upon completion of the Works.


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E.2 Al l dimensions and levels on the Drawings and the Site, shall be checkedparticularly the correlation between components and the work in place. Materialsand components shall not be ordered, or work carried out, until discrepancieshave been resolved with the Engineer.

E.3 Appearance and Fit: The Works shall be constructed to higher levels of accuracythan those specified where it is necessary to achieve a desired appearance andalso to ensure that materials, elements, and components of the building fit togetheras designed. Wherever the accuracy, fit or appearance of the work is likely to becritical, or difficult to achieve, the Contractor shall obtain the Engineer's approval ofproposals or of the partially finished work as early as possible.

E.4 Non-Compliance: Work which fails to meet the specified levels of accuracy mustnot be rectified before the Contractor submits and receives approval of proposedrectification works. All additional costs resulting from these rectification worksshall be borne by the Contractor.

1.03.10 HAUL ROUTES FOR HEAVY VEHICLES

A. The Contractor shall prepare proposals for routes to be used by heavy vehiclesparticularly for hauling fill materials. Routes shall where possible, avoid existingroads and built-up areas. Signs shall be provided and maintained to direct

construction traffic to and from haul routes. Details of haul routes and signing shallbe submitted to the concerned in Traffic Directorate for approval within a periodnot exceeding one month prior to the commencement of the Works in the relevantarea and the signs shall be erected prior to actual commencement of the Works.

B. I f and where it is necessary for Contractor's plant or vehicles to cross publichighways, and where required by the Engineer, all such crossings shall beequipped with manually controlled traffic lights.

D. Stationary vehicles, equipment, huts, stockpiles of materials, etc., shall be keptwell clear of crossing points so that persons using the highway and the haul roadshall have adequate sight distance at all times.


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1.03.11 SCAFFOLDING AND FALSEWORK

A. The Contractor shall provide scaffolding and falsework to facilitate carrying outconstruction of the Works in the required sequence. Scaffolding and falsework shall

be properly designed and constructed specifically for the loads intended. Full detailsof the proposed arrangements shall be submitted to the Engineer for his approval.Such approval, however, shall not relieve the Contractor of his responsibility withregard to the adequacy of all scaffolding and falsework used in the Works.

1.03.12 USE OF EXPLOSIVES

A. Control Measures

A.1 The Contractor shall not use explosives without the express permission from thecontrolling Authority. The Contractor shall abide by all rules and regulations of theconcerned Authorities regarding purchasing, transportation, storing, handling andusing the explosive materials.

A.2 Explosives and detonators shall be stored in special buildings as approved by theconcerned Authorities. These secured buildings should be located and clearlymarked English and Arabic "DANGER - EXPLOSIVES" as approved by theconcerned authorities. Explosives and detonators shall be stored in separatebuildings.

A.3 Al l possible precautions shall be taken against accidental fire or explosion, and toensure that the explosives and detonators are kept in proper and safe condition.

A.4 Explosives and detonators shall always be transported in separate vehicles andkept apart until the last possible moment. Metallic tools shall not be used to openboxes of explosives.

B. Blasting Procedures

B.1 Ensure that blasting shall only be carried out by experienced shot firers. Priming,charging, stemming and shot firing shall be carried out with greatest regard forsafety and in strict accordance with the Rules and Regulations of the concerned

Authorities. Adequate warning of blasting shall always be given and all personscleared from the area, before blasting takes place.


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B.2 Ensure that police and other concerned Authorities shall be kept fully informed ofthe blasting program so that they may be present when blasting takes place if theyso require.

B.3 Ensure that explosive charges are not excessive, charged boreholes are properlyprotected, and proper precautions are taken for the safety of persons and property.Only the Contractor shall be responsible of people and premises full protection.

C. Explosives Inventory

C.1 The Contractor shall maintain an up-to-date inventory of all explosives andexplosive devices and shall submit a monthly report to the Engineer, detailing the useof all explosives by date and location.

1.03.13 FIRE FIGHTING EQUIPMENT

A. The Contractor shall take all necessary measures to prevent personal injury ordeath or damage to the Works or other property and adequate, fully operational firefighting equipment shall be furnished and maintained by the Contractor whoseworkmen shall be trained in the operation of such equipment.

B. Fire fighting arrangements shall be made as required by the local Civil DefenceDepartment and provision of fire fighting facilities in all vulnerable areas and asinstructed by the Engineer.

C. Adequate water for fire fighting shall be available and outlets located so as to bereadily accessible.

D. Al l equipment shall be regularly tested and properly maintained.

1.03.14 PHOTOGRAPHIC RECORDS OF CONSTRUCTION

A. The Contractor shall submit each month good quality progress photographs of atleast 5 different subjects as agreed by the Engineer. For each subject, the Contractorshall supply progress photographs taken from approved locations stations but notless than 20 (twenty) at monthly intervals and submit 3 color prints (gloss finish) notless than size 16 cm x 20 cm of each negatives and color transparency.


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B. Each print and transparency supplied, shall be titled and referenced to a suitable keyplan. Prints and negatives shall also be suitably cross referenced.

1.03.15 SITE CLEANING AND FINAL CLEAN UP

A. Site Cleaning During Progress of Works

A.1 Al l parts of the Site, and adjacent roads affected by the Works, shall be maintainedin a clean and tidy condition during progress of the Works. All waste and surplusmaterials and other rubbish resulting from the Works or otherwise, shall be clearedaway to locations approved by the Municipalities and Directorate at intervals asdirected by the Engineer.

A.2 I f the Contractor fails to remove any surplus or waste materials from the Site within3 days after being instructed to do so by the Engineer, these materials may beremoved by others at the Contractor's expense.

B. Final Clean Up on Completion

B.1 The entire Site shall be delivered up on completion of the Works, in a clean, neatand presentable condition, all as specified hereunder and as described in theGeneral Conditions of Contract.

B.2 Spoil tips, borrow pits and deposited materials shall be trimmed and regularized toprofiles and levels as directed. Flow of water courses affected by the tips or pitsshall be maintained without interruption and any agreement concerning these sites,existing between the Employer and the persons or Authorities concerned, shall beobserved.

B.3 Temporary Markings coverings and protective wrappings shall be removed unlessotherwise instructed by the Engineer.

B.4 Partial Possession by Employer: Where the Works are to be completed in sections,and any such section depends for its adequate functioning on work locatedelsewhere on the Site, such other work shall be completed in time to permitsectional completion as required.


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SECTION 1.04 TEMPORARY WORKS

1.04.1 SCOPE

A. The Contractor shall construct, as required, all temporary detour roads, temporarybridges and culverts, and other facilities for his Works or for maintenance of traffic inlocations affected by his works.

B. The Contractor shall construct and maintain all detour routes ensuring at all timesthat the detour routes are signed, striped, lighted, maintained and furnished with alltraffic control devices as shown, directed and/or needed. These proposed detoursmust be submitted to the Engineer for approval.

C. Trench crossings are to be provided for free and safe passage of vehicles andpedestrians over pipe and other trenches.

1.04.2 DESIGN REQUIREMENTS

A. Designs and detailed working drawings for proposed Temporary Works shall besubmitted for approval, prior to commencing such Works. The Contractor shall beheld responsible for any damage that may result from the Temporary Works.

1.04.3 AGREEMENT OF PROPERTY OWNERS

A. The Contractor shall obtain the agreement of the affected land owners and approvalfrom the Engineer prior to commencing Temporary Works. Such approval shall notin any way relieve the Contractor of his responsibilities expressed in the General

Conditions of Contract.


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SECTION 1.05 CONTROL OF MATERIALS AND STANDARDS FORSAMPLING AND TESTING

1.05.1 STORAGE OF MATERIALS

A. Materials shall be so stored as to assure the preservation of their quality andsuitability for the Works. Stored materials, approved before storage, may again beinspected prior to their use in the Works. Stored materials shall be located so as tofacilitate their prompt inspection.

B. Where materials are stockpiled on Government or private property, such sites shallbe abandoned immediately upon consumption of all stockpiled materials and thenatural surface shall be restored as far as practicable to the original condition by the

Contractor and to the satisfaction of the Engineer.

1.05.2 HANDLING MATERIALS

A. Al l materials shall be handled in such manner as to preserve their quality andsuitability for the Works. Aggregates shall be transported to the Works in vehicles,which are constructed to prevent loss or undue segregation of materials afterloading and unloading.

1.05.3 MATERIALS SUPPLIED BY EMPLOYER

A. The Contractor shall be responsible for all materials furnished by the Employer andshall make good any shortages or deficiencies, from any cause whatsoever, or anydamage which may occur, after delivery of such materials.

1.05.4 LOCAL MATERIAL SOURCES

A. When material sources are not designated on the Drawings, or in other documents,the Contractor shall be responsible for locating and providing suitable materialsfrom approved sources.

B. Any information provided in the tender documents about sources of local materialsis considered as a guideline only and does not relieve the Contractor of hisresponsibility in respect of investigation and supply of suitable materials asspecified.


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C. Materials, regardless of their source, shall not be incorporated in the Works untilapproved by the Engineer.

1.05.5 SOURCES OF SUPPLY AND QUALITY REQUIREMENTS

A. Al l materials, including manufactured articles, and machinery incorporated in theWorks, shall meet all specified quality requirements and be approved by theEngineer.

B. The Contractor shall, before placing any purchase order for any materialsintended for incorporation in the Works, submit for approval a completedescription of all such materials, names of the firms from whom he proposes topurchase them and copies of all test reports verifying conformity with theprovisions of the Specifications. Materials shall not be ordered without the

approval of the Engineer. When directed by the Engineer or otherwise specified,the Contractor shall submit suitable samples for approval.

C. The Engineer shall have the right to retest all materials which have been testedand accepted at the source of supply after delivery to the Site and prior toincorporation into the Works and to reject any such materials which are clearlydefective or, when retested, do not conform with the Specifications.

1.05.6 CERTIFICATES OF GUARANTEE AND PRODUCTION PLANTINSPECTIONS

A. Al l shipments of materials shall be accompanied by a Certificate of Origin and aManufacturer's Certificate of Guarantee or Test Certificate from an approvedindependent qualified laboratory approved by the Engineer. All certified materialsdelivered to the Site shall undergo additional laboratory testing i f required by theEngineer.

B. Issuance of an invalid or erroneous Certificate of Guarantee shall be just causefor rejection of the materials without further testing.

1.05.7 SAMPLING AND TESTING PROCEDURES

A. Sampling

A.1 Samples of all materials shall be submitted to the Engineer for inspection, testingand acceptance before incorporation in the Works. All materials being used will besubject to inspection, testing, or rejection at any time prior to such incorporation.


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A.2 Where untested and unaccepted materials have been used without approval of theEngineer, such use shall be at the Contractor's risk.

B. Source Tests

B.1 Al l source samples shall be taken by the Contractor in the presence of theEngineer, using approved sampling procedures. All source approval tests shall beperformed under the supervision of the Engineer or, when so specified, by anindependent laboratory approved by the Engineer and engaged by the Contractor.

B.2 After approval of any source of materials, the Contractor shall produce from suchsource only to the extent that materials produced are of substantially the same qualityas the approved samples.

B.3 The Engineer will periodically order retesting of previously approved sources toverify that they continue to conform to the Specifications and may order retesting atthe same or at a different laboratory from the one performing the original sourceapproval tests. I f retesting indicates that a previously approved source no longerconforms with the Specifications, the Contractor shall forthwith cease productionfrom such source.

C. Job Control Tests

C.1 Job control tests shall be performed by the Contractor prior to submitting anymaterials to the Engineer for approval. The Contractor shall submit details to theEngineer of his job control testing program.

C.2 The Engineer may declare the Contractor's job control testing programunacceptable i f frequent rejections of submitted materials occur when subjected tothe Project Control Tests.

D. Project Contro l Tests

D.1 Al l Project Control samples shall be taken jointly by the Engineer and theContractor. Tests shall be performed in the Site Laboratory, or in situ as appropriate,under the supervision of the Engineer.


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D.2 The Engineer may order retesting of any material i f there has been a significantdelay in the construction operations or i f he determines that the material hasdeteriorated since its original acceptance. Material which does not conform with theSpecifications will be rejected and shall be removed from the Works and replaced orcorrected by the Contractor. The Engineer may order additional testing to ascertainthe extent of unacceptable material.

E. Check Tests

E.1 The Engineer may periodically order check tests to verify the accuracy of ProjectControl testing and equipment. The Engineer may direct that check tests beperformed by qualified persons other than those normally responsible for ProjectControl testing, or he may direct that the samples be sent to the Employer's Centrallaboratory or to an approved independent laboratory for testing.

E.2 The Contractor shall provide the Engineer with all necessary Test Report forms andexpendable materials required to perform all required tests. Copies of all test resultswill be issued to the Contractor.

1.05.8 SAMPLING AND TESTING STANDARDS

A. Standards to be Suppl ied

A.1 The Contractor shall, at the commencement of the Contract, furnish for use on siteby the Engineer and the Contractor one complete set of the following standards. Theset shall become the property of the Contractor upon completion of the Works.

A.1.1 AASHTO Standard Specifications for Transportation Materials and Methods ofSampling and Testing (Part I: Specifications, and Part II : Tests).

A.1.2 ASTM Standards for Testing and Materials: Section 00 plus all Volumes in Sections1 to 6 inclusive, plus Specifications, as required, from Sections 7 to 15 inclusive.

A.1.3 British Standards referred to in the Specification

A.1.4 SASO Standards.


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A.1.5 DIN

A.1.6 ISO

A.1.5 All other relevant Standards referred to in the Specifications.

B. Precedence of Materials and Testing Specifications

B.1 Al l references to methods of testing or specifications of AASHTO, ASTM andothers will be deemed to refer to the latest methods of testing as specified in theContract Documents.

B.2 Unless otherwise specified, AASHTO methods of sampling and testing shall beadopted where available. In the case of absence of an appropriate AASHTOspecification, the ASTM or BS specification shall govern.

1.05.9 UNACCEPTABLE MATERIALS

A. Al l materials not conforming to the requirements of the Specifications at the time

they are used will be rejected and shall be removed immediately from the Siteunless otherwise instructed by the Engineer.

B. No rejected material, the defects of which have been corrected, shall be used untilapproval has been given.


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SECTION 1.06 CONTRACTOR'S PLANT AND EQUIPMENT

1.06.1 GENERAL

A. Plant and equipment used on the Works shall be of sufficient size and in suchmechanical condition as to meet the requirements of the Specifications and shall beavailable for use when required by the Engineer. The Engineer may order removaland replacement of unsatisfactory plant or equipment.

B. Wherever plant or equipment of a particular size or type is specified, the Contractormay request permission to use an alternative type in place of that specified. In suchcases, the Contractor shall furnish evidence to the Engineer, before approval is

given, that the production of the plant or equipment proposed is at least equal to thatof the specified type.

1.06.2 CONTRACTOR'S SCHEDULE OF PLANT AND EQUIPMENT

A. The Contractor shall submit together with his Tender, a detailed schedule of thenumbers and types of plant and equipment which he proposes to utilize on Site tocarry out the Works. The schedule shall contain full details for each item, includingtype, manufacturer, model, identification number, year of manufacture, number ofyears in use, and, for all new and previously used items, the manufacturer'sbrochures, catalogues and specifications.

1.06.3 PROVISION AND USE OF PLANT AND EQUIPMENT

A. The Contractor shall furnish all plant and equipment listed in his Schedule andnecessary for construction of each phase of the Works. Such plant and equipmentshall be delivered to the Site, inspected, and approved by the Engineer prior tocommencement of the particular phase of the Works for which it is intended. Any

plant or equipment, or part thereof, which becomes excessively worn or defectiveshall be promptly repaired or replaced, as required by the Engineer.

B. The Contractor shall not remove from the Site any approved plant or equipmentwithout the permission of the Engineer.


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SECTION 1.07 MEASUREMENT PROCEDURES

1.07.1 GENERAL

A. Al l Works shall be measured net and in accordance with of the General Conditionsof Contract. All units of measurement shall be in the Metric System, unlessspecified otherwise.

B. The method of measurement and computations to be used in determining quantitiesof materials furnished and of Works performed shall be as defined in the Method ofMeasurement.

C. All field measurements of quantities for monthly certificates and for final paymentshall be made by the Contractor in the presence of the Engineer. Original copies ofthe field measurement notes, signed by the Contractor, will be retained by theEngineer.

D. I f the Contractor fails to measure any Pay Items, the Engineer may, at hisdiscretion, estimate quantities of such items for the monthly Payment Certificate orrecommend that no payment be made for the Items not measured and quantitiesnot computed until i t is measured.

1.07.2 MANUFACTURED ITEMS

A. Whenever standard manufactured items are specified, such as fence wire, plates,rolled shapes, pipe conduit, etc. and these items are identified by gauge, unitweight, section dimensions, etc., such identifications shall be deemed to be nominalweights or dimensions. Unless controlled by tolerances in cited specifications,manufacturing tolerances established by the industries involved may be acceptedby the Engineer at the recommendation of the Concerned Authorities.

1.07.3 FITTINGS AND ACCESSORIES

A. When any Items are shown on the Drawings or specified as requiringmiscellaneous fittings and accessories for which no separate measurement isprovided, the Pay Item will be deemed to include for all such fittings andaccessories.


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1.07.4 WEIGHT MEASUREMENTS

A. Al l materials which are to be measured or proportioned by weight shall be weighedon accurate and approved scales by competent and qualified personnel, at

locations designated or approved by the Engineer.

1.07.5 LINEAR AND AREA MEASUREMENTS

A. Al l items which are to be measured by linear meter shall be measured parallel tothe base or foundation upon which such items are placed, unless otherwise shownon the Drawings.

B. Unless otherwise specified, longitudinal measurements for area computations shallbe made horizontally and no deductions shall be made for fixtures with an area lessthan one sq.m. Transverse measurements for area computations shall be the neatdimensions shown on the Drawings or as ordered by the Engineer.

C. No measurements shall be made of rolled down or sloping edges of bituminouscourses.

1.07.6 VOLUME MEASUREMENTS IN VEHICLES

A. Materials to be measured by volume in the hauling vehicle shall be hauled inapproved type vehicles and measured therein at the point of delivery. Vehicles forthis purpose may be of any size or type approved by the Engineer, provided thatthe body is of such shape that the actual contents may be readily and accuratelydetermined. All vehicles shall be loaded to their level capacity and the Engineermay require loads to be releveled when the vehicles arrive at the point of delivery.

B. When requested by the Contractor and i f approved by the Engineer, materialspecified to be measured by the cu. m. may be weighed and such weights will beconverted to cu. m. for payment purposes. Factors for conversion from weightmeasurement to volume measurement will be determined by mutual agreementbetween the Engineer and the Contractor, i f no agreement is obtained, the factorswill be determined by the Engineer and shall be accepted by the Contractor.


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1.07.7 EARTHWORK VOLUME MEASUREMENTS

A. The quantities of excavation paid for under the Contract unit prices shall be limitedto the lines shown on the Drawings and on approved cross sections. Excavation

beyond lines shown on approved cross sections shall not be paid for unlessapproved by the Engineer. Excavation in excess of approved cross sections wi l l bemeasured for payment only in the case of unstable or unsuitable materials orderedby the Engineer to be removed.

B. The Engineer wil l adjust the angle of slopes for cuts and fills as the Works proceedand make determinations of the appropriate slope angles following his evaluation ofsoil conditions in case there is a change in the type of the soil. The actual slopes ofthe cuts as constructed shall be measured and recorded by the Contractor. TheEngineer will check these records and, i f satisfactory, wi l l approve the

measurements as a basis for payment.

C. Within 60 days of the date of field survey, the Contractor shall submit to theEngineer for his approval, plots of the original and final earthwork cross sectionstogether with the area and volumetric earthwork computations. The Contractor'scross sections shall be on transparent cross section sheets for print reproductions.

All sheets shall have a title block and be of the size designated by the Engineer. Onfinal approval of the Contractor's cross sections, the Contractor shall submit theoriginal transparencies and 3 prints of each such transparency.

D. In case of any variations from the approved Drawings, the Contractor shall submitthe original and 2 copies of the plotted cross sections and profiles and the notesand computations of his survey. The Contractor shall take cross sections atmaximum 25 m intervals along the centerline and at other locations i f directed bythe Engineer. Upon mutual agreement between the Engineer and the Contractor,the Contractor may submit cross sections intermediate to these locations. TheEngineer will indicate, on one copy, his approval of the proposed lines of the Worksor his revisions thereto and return such copy to the Contractor. The Contractor shallresubmit for approval any cross sections the Engineer may have revised.

E. The Contractor may, as an alternate method of earthwork computation, requestapproval to use an electronic computer. Such request shall include details of thecomputer hardware, the earthwork software programs, the input and output, and acomplete summary of the methods and procedures to be used. The Contractor mayuse an electronic computer for computations, only if approved, and continuance ofsuch approval is contingent upon satisfactory results being achieved. I f results arenot as represented or are otherwise deemed unsatisfactory, the Contractor shallrecompute the earthwork quantities by the cross section method.


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SECTION 1.08 TEMPORARY FACILITIES

1.08.1 GENERAL

A. LOCATIONS: The Engineer's approval is to be obtained for the intended locationssitting of all spoil heaps, Temporary Works and services.

B. STANDARDS AND DETAILS: Temporary Works are to be constructed torecognised standards and codes of practice so that they are fit for their purpose.Drawings and details of proposed Temporary Works are to be provided by theContractor if requested by the Engineer.

C. TEMPORARY WORKS and services are to be maintained, altered and adaptedand as necessary and cleared away on completion or when no longer required.Work disturbed is to be made good.

D. GENERAL: The Contractor shall provide all Temporary Works and services andContractor's Equipment and tools required for the efficient and safe execution ofthe Works, including but not limited to:

Temporary roads, hard standings, sleeper tracks and the like.

Temporary fences, gates and barriers.

Temporary offices, stores, messrooms, latrines and compounds.

Scaffold, ladders, hoists, cranes and the like.

Temporary screens, chutes, coverings, roofs and rainwater pipes forprotection of the Works and personnel.

Transport and vehicles on and off Site.

Fixed and movable mechanical plant and equipment.

Small tools.

Temporary water and power supplies and site lighting.

Temporary drainage.


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1.08.2 TEMPORARY SITE FACIL ITIES

A. ROADS: Permanent roads, hard standings and footpaths on the Site may be usedprovided they are adequately maintained and thoroughly cleaned and made good

after use and left in unimpaired condition.

B. DIVERSIONS: The Contractor shall in accordance with the specification of theMinistry of Communication and with liaison with the Traffic Department:

Provide temporary detour roads, temporary bridges and culverts, and otherfacilities to divert traffic through or around any part of the Works or formaintenance of traffic in locations affected by his works that warrant suchTemporary Works. Location, standard, width, construction andmaintenance of detour routes shall be in accordance with Section 3.06 of the

Specification, approved by the Engineer, ensuring at all times that theroutes, are signed, striped, maintained and furnished with all traffic controldevices as shown, directed and/or needed.

Submit designs and detailed working Drawings of the proposed TemporaryWorks for approval by the Engineer prior to commencement of the works.The design live load for temporary bridges related to roads exposed to heavyvehicles shall not be less than the design live load for permanent bridges, oras directed by the Engineer.

Where measurements are required for continuously regulating and

supervising traffic, provide temporary roads and bridges for one-way trafficwith a minimum width of 3.5m. In all other cases the minimum width shallbe 7m.

Phase the execution of temporary and Permanent Works to minimise thedisruption to traffic.

Submit a phased programme of Temporary Works one month beforecommencement of any part of the works.

C. TRAFFIC DIVERSIONS: The Contractor shall provide temporary diversions,detour roads, temporary bridges, culverts and similar facilities, whenever it isnecessary to safely divert traffic through or around any part of the Works. As perconcerned authorities requirements for locations design widths, construction andmaintenance of diversion and detour routes, including the provision of signs,pavement markings, lighting, traffic control and the like are to be submitted to andapproved by the Engineer prior to execution on Site.


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E. FRENCH CROSSINGS are to be provided for free and safe passage of vehiclesand pedestrians over pipe and other trenches.

F. TEMPORARY SITE FENCE: The Contractor shall provide suitable and secure

temporary site fencing and gates where necessary or as directed by the Engineer.Design of the fencing and gates, including location, construction details, etc. is to besubmitted to the Engineer for approval prior to fabrication and erection.

G. NAMEBOARD: The Contractor shall provide reflecting boards (150 x 150) cm atthe start and end point of the excavations. Those boards should include the projectname, project no., ministry name, Contractor name, and his local address andphone No. in addition to the supervision Consultants. Boards specifications andlocations should be approved by the Client and the Engineer.

General nameboards for the whole project should be fixed at the specified locations by theEngineer and in each district of the project area. Those boards should include the projectname, Client name, Contractor name, Contact nos, Consultant name and phone no. for thesupervision staff office. Boards will be of 4 separated slices each of (240 x 240) cm withspaces of 20 cm between slices that are made of 3 mm thick aluminum and provided withback grooves for fixing on the columns, so no holes should appear at the face side of theboard. Face slide should be covered with reflective blue layer and text in reflective whitecolor.

Boards shall be fixed on two columns of hot galvanized (16 or 18) cm I beams and the

clear space from the ground to the bottom of the slices shall be 2.0 m and the columnsshould be provided with movable hinge according to the MOT specifications and fixed tothe ground by concrete blocks as per the site conditions. All these details should beapproved by the Engineer prior to installation of boards.

1.08.3 CONTRACTOR'S TEMPORARY BUILDINGS

Complete according to Project - Project Specifications. To be completed by the designconsultant and the water authority.

1.08.4 TEMPORARY SERVICES

A. WATER: The Contractor shall provide clean, fresh water for the Works and maketemporary arrangements for storing and distributing about the Site.


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B. ELECTRICITY: The Contractor shall provide electric supply and all equipment forlighting and power for the Works and make temporary arrangements for distributingabout the Site.

C. POWER: The Contractor shall provide electric power for the Works, includingsupplies for commissioning engineering services and Plant, at the requiredvoltages.

D. LIGHTING: The Contractor shall provide lighting for the Site and the Works forsafety and security of the Works and to facilitate proper execution of work and toilluminate internal surfaces during finishing work and inspection. Spaces designedto be artificially lit during daylight hours are to have temporary illumination similarto that provided by the permanent installation.

E. PERMANENT ELECTRIC SUPPLY AND LIGHTING INSTALLATION may be usedfor testing and commissioning and to illuminate the Works, subject to the followingconditions:

The Employer does not guarantee that it wi l l be available.

The Contractor must take responsibility for the operation, maintenance andsupervision of the system, indemnify the Employer against all damage andpay all costs and renew all used tubes and lamps.

The Contractor must indemnify the Employer against reduction inmanufacturer's guarantee periods for equipment etc. due to its use beforecompletion of the Works.

F. TELEPHONES: The Contractor shall provide joint temporary telephone facilitiesfor his own and Subcontractors' use and for the use of those acting on behalf ofthe Engineer and shall pay the cost of all calls except international calls made bythose acting on behalf of the Engineer.

1.08.5 DIVERSION OF PUBLIC UTILITY SERVICES

A. TEMPORARY DIVERSION OF EXISTING PUBLIC UTILITY SERVICES: Whereexecution of the Works involves the temporary diversion of existing public utilityservices, the Contractor shall perform such temporary diversion and shall maintainthe flow or service as directed by the Engineer. Unless otherwise stated, the costsof any such diversions are deemed to be included in the Contract Price.


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B. PERMANENT DIVERSION OF EXISTING PUBLIC UTILITY SERVICES: Wherethe Works require the permanent diversion of existing public utility services, eitheras shown on the Drawings or directed by the Engineer, the diversion shall be carriedout by the Contractor and shall be paid for at the prices stated for such work inthe Bill of Quantities.


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SECTION 1.09 SAFETY PRECAUTION MEASURES

1.09.1 GENERAL

A. Contractor shall take all necessary measures for public safety for all projectcomponents according to the requirements of municipalities and other concernedauthorities.


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PART 2: Excavation and Backfilling Technical Specification for Water Network

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PART 2 : EXCAVATION AND B ACKFILL ING

SECTION 2.01 SCOPE

A. The Work Covered in this Division Comprises: Clearing of the site, and excavationand backfilling for roads, structures and trenches and protection work related togabions, riprap, stone pitching and geotextiles.


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SECTION 2.02 SITE CLEARING

2.02.1 CLEARING AND GRUBBING

A. The Contractor shall remove and dispose of all vegetation, surface debris, stonesand rocks from areas where the Works are to be performed.

B. When shown on drawings or directed by the Engineer, the Contractor shall removeand dispose of pavement layers including asphalt and granular layer to the surfaceof the subgrade. Moreover the ground surface under all structures shall be clearedof all existing concrete foundations (if any) and stumps.

C. Trees shall be removed carefully, stored and / or relocated as specified or asinstructed by the concerned Authorities and the Engineer.

2.02.2 REMOVAL OR REALIGNMENT OF OBSTRUCTION ANDUTILITIES

A. The Contractor shall remove wholly or in part and dispose of all obstructions,buildings, fences, abandoned pipelines and others, as indicated on drawings or as

directed by the Engineer.

B. Where indicated on the Drawings, utilities are to be realigned or salvaged asdirected by the Engineer.


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SECTION 2.03 EXCAVATION

2.03.1 GENERAL

A. Earth: naturally occurring, man made or placed material that can be removedmanually or by mechanical shovel, bulldozer or other mechanical equipment.

B. Rock/Hard Materials: naturally occurring, man made or placed material of more thanone cubic meter that cannot be destroyed or removed by methods used for removal ofearth described in Clause A but requires the use of pneumatic tools, impact breakersor, i f allowed, explosives for its removal.

C. Materials and conditions: the Contractor shall assess the nature of the work and thematerials to be excavated, and shall take sole responsibility for his assessment ofmaterials and conditions.

D. Ground-water le