floor systems for substation 78-tmss-12-r0

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FLOOR SYSTEMS FOR SUBSTATIONS

PROPRIETARY INFORMATION

This document contains proprietary infonnation developed by and for exclusive use of SaudiElectricity Company. Your acceptance of the document is an acknowledgement that it must be usedfor the identified purpose/application and during the period indicated. It cannot be used or copied forany other purposes nor released to others without prior written authorization of Saudi ElectricityCompany. Saudi Electricity Company will not be responsible for misuse and/or misapplication, andany hann resulting therefrom. Saudi Electricity Company also reserves the right to take anynecessary actions to protect its interest against unauthorized use.

ORIGINATED BY CERTIFIED BY APPROVED BY

Engr. Khalaf M.AI-Ma'ashiDivision Manager,

Engineering Support

78TMSS 12RO/SZA

Engr. Abdullah M. AI-GarniDepartment Manager,

Transmission Standards &Specifications

Date of Approval:

Engr. Saleh N. AI-SohaibaniExecutive Director,

Engineering & Projects

PAGE NO. 1 OF 18

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March 11, 2009

TRANSMISSION MATERIALS STANDARD SPECIFICATION 78-TMSS-12, Rev. 0

PAGE NO. 2 OF 18 78TMSS12R0/SZA

Date of Approval: March 11, 2009

TABLE OF CONTENTS

1.0 SCOPE 2.0 CROSS REFERENCES 3.0 APPLICABLE CODES AND STANDARDS 4.0 CONCRETE EPOXY FLOOR DUST PROOFER AND HARDENER 4.1 Use 4.2 Composition and general requirements 4.3 Specific Requirements 4.4 Surface preparation 5.0 RAISED FLOOR SYSTEM 5.1 Use 5.2 General Requirements 5.3 Specific Requirements 5.4 Loads 5.5 Other Requirements 5.6 Installation 5.7 Submittals 5.8 Quality Assurance 6.0 CERAMIC TILES 6.1 Wall and Floor Tiles For Toilets 6.2 Wall and Floor Tiles For Battery Room 6.3 Installation Of Ceramic Tiles




1.0 SCOPE This Transmission Material Standard Specification (TMSS) specifies the minimum

technical requirements for the procurement of the following flooring materials and systems intended to be used in Saudi Electricity Company (SEC), Saudi Arabia.

1. CONCRETE EPOXY FLOOR DUST PROOFER AND HARDENER 2. RAISED FLOOR SYSTEM 3. CERAMIC TILES 2.0 CROSS REFERENCES This Material Standard Specification shall be read in conjunction with the latest revision of

SEC General Specification 01-TMSS-01, titled "General Requirements for All Equipment/Materials" which shall be considered as an integral part of this TMSS.

This TMSS shall also be read in conjunction with SEC Purchase Order or Contract

Schedules for project, as applicable.




3.0 APPLICABLE CODES AND STANDARDS The latest revision/amendments of the following Codes and Standards shall be applicable

for the materials covered in this TMSS. In case of conflict, the vendor/manufacturer may propose the materials conforming to one group of Industry Codes and Standards quoted hereunder without jeopardizing the requirements of this TMSS.

3.1 SSA 1031 Ceramic Tiles 3.2 ASTM E 1907 REV A Guide to Methods of Evaluating Moisture Conditions

of Concrete Floors to Receive Resilient Floor Coverings

3.3 BS 6319 Testing of Resin Compositions for Use in Construction 3.4 BS 6431 Ceramic Floor and Wall Tiles 3.5 BS 8203 Code of Practice for Installation of Resilient Floor

Coverings 3.6 NFPA 75 Standard for the Protection of Information Technology

Equipment 3.7 NFPA 99 Standard for Health Care Facilities 3.8 ISO 9001 Quality Management Systems -Requirements 3.9 CISCA/AF Ceiling and Interior System Construction Association,

Recommended Test Procedures for Access Floors 3.10 ANSI A 10.20 Safety Requirements For Ceramic Tile, Terrazzo, And

Marble Work 3.11 Vaisala Thermohygrometer Type MH 315. 3.12 Tile Council of America (TCA) A Handbook for Ceramic Tile Installation




4.0 CONCRETE EPOXY FLOOR DUST PROOFER AND HARDENER 4.1 Use This system is to be used for internal flooring in all the SEC Transmission

Substations as specified by SOW/TS which includes switchgear rooms, mechanical rooms etc.

If this system is specified for external areas exposed to sunlight, such as sidewalks,

platforms etc., it shall be UV (Ultra Violet) resistant and as specified in SOW/TS. This system shall not be used where raised flooring or Ceramic flooring tiles are

used. 4.2 Composition And General Requirements The material shall be four-component system consist of binder (epoxy resin),

hardener (magnesium silicoflouride), aggregate and pigment. These components shall be pre-weighed for site mixing strictly as per the recommendation of the manufacturer. It shall be acceptable only if the following requirements are satisfied:

4.2.1 It shall chemically react with free lime and calcium salts in hardened

concrete to make it more dense and durable surface. 4.2.2 It shall penetrate concrete surface and make it hard, free from dusting and

high resistant to corrosion and abrasion. 4.2.3 Chemically resistant Shall resist acids, alkalis, oil and salts. 4.2.4 Durable Shall have good wear and tear and abrasion resistance. 4.2.5 Hygienic Shall be Impervious, self-leveling, seamless floor surface which can be easily

cleaned. 4.3 Specific requirements 4.3.1 Nominal thickness shall be 2 mm to 5 mm as specified in SOW/TS. Shall

have smooth and glossy finish and light reflective surface. 4.3.2 Floor hardener shall achieve compressive strength of 50 MPa and flexural

strength of 30 MPa at 7 days when tested to BS6319.




4.3.3 It should be capable of resisting continuous pedestrian traffic and vehicular

traffic including forklifts for 48 hours. 4.4 Surface preparation 4.4.1 General It is essential that the surface preparation of the concrete is done properly to

obtain optimum performance. The new concrete shall have completed the curing and drying period as per

TCS-Q-113.03. The moisture content of the concrete should be below 4% by weight. The factors responsible for the release of surface water like the thickness of the concrete, the season, the temperate and relative humidity of the environment and the prevailing ventilation conditions should always be checked and measured prior to the coating application.

The moisture content at the concrete surface shall be measured using an

instrument called a Protimeter or in accordance with BS 8203 Appendix A or by a Vaisala thermohygrometer type MHI 31.

The weak top surface layer (laitance) in the concrete floors is to be removed. 4.4.2 Floor Preparation Proper surface preparation shall be ensured to have good substrate adhesion

and long-term protection of any floor coating. The following methods to be applied as required; a. Removal of chemicals from floor surfaces The removal of chemicals, oil and grease must be completed before

any other preparation of work commences, such as acid etching, blasting, etc. Concrete surface that has become contaminated by chemicals must be neutralized and cleaned as per the manufacturer before coating. The surface shall be approved prior to application by the COMPANY REPRESENTATIVE.




b. Abrasive blast cleaning Abrasive blast cleaning shall be done for heavy duty flooring

systems, under supervision and approval of COMPANY REPRESENTATIVE. The work shall be well organised and shall not affect the adjacent structures or equipments, in case of old/existing concrete. Blasting shall be done such that it makes the surface of the floor to the required profile, which will enable the coating to gain a physical as well as chemical bond to the substrate. Blast cleaning is the recommended system for large areas.

c. Scarifying (Scrabbling) The scarifier uses rotating wheels and brushes to scour the concrete

surface. The scarifier is pushed on the floor and the enclosed rotating wheels abrade the surface. Care shall be taken not to cause excessive damage to the substrate. The work shall be done by skilled operator. This method shall be used for small areas or areas where abrasive blast cleaning cannot be carried out.

d. Power grinding This method can be used to open up holes and voids and to remove

loose materials from the surface of poured concrete and Precast slabs. Recommended for small external floor areas only.

e. Wire brushing This method can be used to remove loose material from the surface

and open up holes and voids in poured concrete. This can be either power or hand wire brushing.

f. Impact tools Poured concrete surfaces can be roughened using impact tools such as

Needle Guns etc. This method shall be considered for small areas. Granulating or Hammering machines work quicker but should only

be used if flooring screeds are to be applied. Impact tools are normally electrically or compressed air driven and

work on principal of a sharpened tool vibrating against the surface. Work shall be done by skilled operator and sufficient supervision to be done to avoid damage to concrete as well as physical injury.




g. Acid Etching This method of surface preparation is recommended for use on

existing/old concrete floors. It is carried out to remove laitance, and should only be used in areas where sufficient drainage exists to allow the water and acid solutions to be easily removed. To carry out acid etching, the following procedures should be followed;

i. Before commencing acid etching, the concrete surface should

be cleaned for all loose concrete. ii. Deposits of oil and grease should be removed using an

alkaline cleaner or by steam cleaning. iii. The floor shall be thoroughly dampened with water iv. Sprinkle uniformly over the floor an 8-10% solution of

phosphoric acid in water. The covering rate shall be 0.66 liter/ sq.m.

v. The acid solution should remain on the surface for 2-4

minutes and then rinsed thoroughly with clean water. The rinsing can be done with a water hose and sweeping brush.

vi. It is important that the rinsing operation is carried out

immediately to prevent the formation of salts on the surface, which are difficult to remove.

vii. The concrete surface should be checked for acidity using pH

paper and should have a pH of 7 or greater. viii. Depending on the concrete type, more than one operation may

be required to achieve a satisfactory surface profile. ix. Thorough rinsing with clean water should be carried out after

each etches application. The surface profile should be similar to fine sandpaper.

x. The concrete should be allowed to dry prior to applying the

coating.




5.0 RAISED FLOOR SYSTEM 5.1 Use Raised floor system shall be used in the communication room and other locations as

specified in SOW/TS. 5.2 General Requirements Access flooring shall be portable assembly of modular floor panels on an elevated

support system (under structure) forming a complete under floor cavity to accommodate electrical cables/ communication cables. Panels shall be gravity held with bolted stringers under structure system. Depth of raised floor system shall be 900 mm for Control and Relay room and 600 mm for Communication Room.

Access flooring shall comply all the test requirements in accordance with "Ceiling

and Interior System Construction Association", Recommended Test Procedures for Access Floors", "CISCA/AF".

Access floor system shall consist of the Floor Panels, Floor covering, Understructure 5.3 Specific Requirements 5.3.1 Floor Panels a. Floor Panels shall have the following properties:

Panel thickness

33 mm

Standard Module

600 x 600 mm

Concentrated load

3 – 5 KN

Distributed load

Maximum 30 KN/m²

Electrical conductivity

Less than 107 Ohm

Thermal conductivity

Approximately 1.25 W/m °K

Fire rating

Minimum 3 hours




b. Deflection and Handling Floor Panels including those with cutouts capable of supporting

concentrated design loads of 4500 N (1000 lbs.) magnitude with a top surface deflection under load and as permanent set not to exceed 2.00 mm and 0.25 mm respectively

The panel shall be all steel panel system with steel minimum

thickness 1 mm, welded steel construction and filled with a non-combustible synthetic anhydrite.

Light weight for ease in handling. Approximate weight shall not

exceed 180 N (18 kg). 5.3.2 Floor Covering Floor covering shall be conductive grade and factory applied high-pressure

laminate (HPL) with following specifications. The laminate should be bonded using professional fabricating technique and procedure. Adhesive shall also be conductive.

a. Dimensions Floor covering shall have the following requirements: Nominal minimum thickness 3.2 mm Nominal size 610 mm x 610 mm b. Durability Floor covering shall be clean, with ease of maintenance, long and

high wear, dust free environment and rigid and with washable surface.

c. Electrical Conductivity The floor shall be conductive for control of static electricity.

Conductive laminate flooring must be properly grounded by utilizing a variety of terminals and grounded cords properly attached to the laminate and a suitable earth ground.




5.3.3 Trim Edge trim shall be used to protect the panel and covering against mechanical

damage and humidity. Trim shall be mechanically attached to perimeter of each panel to eliminate any potential separation of edge trim with the panel. Edging will be interlocked with top sheet and fixed by up turned edge of bottom steel sheet.

5.3.4 Understructure The under structure shall be bolted stringer system. It consists of pedestal

assembly and stringer system. Following are the details given about the pedestal assembly and the stringer

system:

Pedestal Assembly: Includes base, column with provision for height adjustment and head cap made either of steel or aluminum or aluminum or a combination of both.

Galvanized and yellow passivated steel construction

Pedestal Assembly shall provide vibration proof mechanism for making and holding fine adjustments in height for levelling purposes over a range of not less than 2 in. include means of locking levelling mechanism at a selected height which requires deliberate action to change height setting and prevents vibratory displacement. Fixing of pedestal to subfloor

Dowelling

Axial load without as permanent deformation as per pedestal without panels or other supports

36.30 KN

Overturning moment without as permanent deformation as per pedestal without panels or other supports

113 N-m

Pedestal head to accept bolted stringer. Pedestal adjusting rod of minimum 22 mm solid steel threaded stud.

a. Pedestal Head Die formed galvanized pedestal head and projection welded stud with

adjustment nut. Head and installed stringers shall provide full as perimeter edge support.

Stringers to be attached with 1/4" - 20 flat head screws. Pedestal head shall be tapped for engagement of stringer screws Gantry lock collar to provide anti-vibration displacement.




Vibration proof leveling nut shall be 22 mm. Pedestal head shall have gasket for fixing of panels and sound

insulation and electrical conductivity As perimeter pedestals shall provide support for panels around

columns at walls, and provide details for complete information. b. Gasket The gasket shall be Conductive synthetic with the following

requirements: Electrical resistance Approximate 104 Ohm Gasket shall also serve as a high frequency safety c. Pedestal Base The requirements are as follows: i. Base to be at least 400 mm2 and hot-dip galvanized steel ii. Pedestal tube shall be 25 mm diameter, galvanized tubing. d. Stringers Stringers should be used with floor height of greater than 500 mm.

These shall be as specified below: Heavy-duty roll formed, steel stringer shall withstand 2 KN (200

Kgs). mid span Load. Hot-dip Galvanized stringer construction to prevent corrosion Stringer shall have factory applied conductive gasket to provide quiet

sound absorbing seal




e. Accessories The various accessories as required are given below:

Cutouts Fabricate cutouts in floor panels to accommodate cable penetrations and source outlets, comply with requirements indicated for size, shape, number and locations. Provide reinforcement or additional support, if needed, to make panels with cutouts comply with standard as performance requirements.

Ramps Manufacturer's standard ramp construction of width and slope indicated, but not steeper than 1 in 12, with non-slip raised disc rubber or vinyl floor covering and of same materials, as performance and construction requirements as the access flooring.

Steps Provide steps of size and arrangement indicated with floor covering to match access flooring. Apply non-slip aluminum nosing to treads unless otherwise noted.

Railings Manufacturer's standard stain finish extruded aluminum post and rail system at ramps and open sided as perimeter of access flooring where indicated, including handrail, intermediate rails, posts, brackets, end caps, wall returns, wall and floor flanges, plates and anchorage’s where required. Provide railing that complies with structural as performance requirements for railing.

Panel Lifting Device

Manufacturer’s standard portable lifting device at least two (2) single and double suction cup type.

Vertical Closures (Fascia)

When under floor cavity is not enclosed by abutting walls, column, beams or downward slabs, provide manufacturer's standard plates with factory-applied finish.

Fit cutouts with manufacturer's standard grommets in sizes indicated or where size of cutouts exceeds maximum grommet size available, trip edge of cutouts with manufacturer's standard plastic molding having tapered top flange. Furnish removable covers for grommets. Provide foam rubber pads for sealing annular space formed in cutouts by cables and trim edge of cutout with molding having flanged and edge for capturing and supporting pads.




5.4 Loads The loading system shall be as under:

TYPE OF LOAD

DESCRIPTION

Ultimate Concentrated Load without Failure

Ultimate concentrated load shall not be less than the value obtained from multiplying the factor indicated below by the specified concentrated design load on floor panels. Failure is defined as the point at which access- flooring system will not take any additional load. Factor: 3.0 Design Concentrated Load: 5 KN

Ultimate Uniform Loads without Failure

Ultimate Uniform Loads without Failure: Ultimate uniform load shall not be less than the value obtained from multiplying the factor indicated below by the specified uniform design load on floor panels. Failure is defined as the point at which access-flooring system will not take any additional level. Factor: 3.0 Design Uniform Load: 25 KN/m2

Rolling loads Rolling loads as noted below applied to panels through CISCA/FA wheel with combination of local and overall deformation not to exceed 1mm measured across panels 610 mm span and an as permanent set not to exceed 1mm after exposure to rolling load as per CISCA/AF path A or B whichever path produces the greatest top surface deformation. 10 Passes of Wheel Load for path A: 4500 N (1,000 lbs) 10,000 Passes of Wheel Load for path B: 4500 N (1,000 lbs)

Impact Load: A load of 670 N (150 lbs) shall be dropped 915 mm into an inch square indenter, there shall be no system failure.

5.5 Other requirements Electrical Resistance of Systems Provide access-flooring system with the following electrical resistance

characteristics: Less than 1 ohm measured across surface of bare panel to under structure by test method as specified in NFPA 99.




5.6 Installation Installation shall be done by highly skilled personnel. The following steps shall act

as guide for installation. The installation shall be done carefully and approval shall be obtained from COMPANY REPRESENTATIVE.

5.6.1 Install access floor system and accessories under supervision of the access

flooring manufacturer's authorized representative to ensure rigid, firm installation free of vibration, rocking, rattle, squeaks and other unacceptable as performance.

5.6.2 Set pedestals in adhesives to provide full bearing of the pedestal base on the

sub-floor 5.6.3 Layout floor panel installation to keep the number of cut panels at the floor

as perimeter to a minimum. Scribe panel assemblies at as perimeter to provide a close fit with no voids greater than 3.2 mm where panels abut vertical surfaces.

5.6.4 Secure grid members to pedestal heads in accordance with access floor

manufacturer's instructions. 5.6.5 Thoroughly clean up dust, dirt and construction debris caused by floor

installations including vacuuming the sub-floor area as installation of floor panels proceeds. Extend cleaning under installed panel as far as possible.

5.6.6 Cutting and trimming or other dirt or debris producing operations will not be

as permitted in the rooms where the floor is being installed. 5.6.7 Level installed access floor to within 1.5 mm of true level over the entire area

and within 2.5 mm in 3.0 m length. 5.7 Submittals Following details shall be submitted to the SEC for approval. No work shall be

started prior to approval. 5.7.1 Product data for each type of access flooring. 5.7.2 Shop drawings indicating complete layout of access flooring based on the

field verified dimensions, including details with descriptive notes indicating materials, finishes, fasteners, typical and special edge conditions, accessories, under structure and other data to as permit a full evaluation of entire access flooring system.




5.7.3 Samples for initial selection purposes in the form of manufacturer charts

consisting of actual units or sections of units showing full range of colors, textures and patterns available for each type of floor covering and exposed finish indicated.

5.7.4 Samples (2 sets) for verification purposes in full size units of each type of

floor covering and exposed finish indicated. 5.8 Quality Assurance To ensure good Quality control/Quality assurance, following guidelines shall be

followed: 5.8.1 Engage an experience installation that is approved by the access-flooring

manufacturer for installation of the types of access flooring required for the project.

5.8.2 Provide access flooring complying with NFPA 75 requirements for raised

flooring. 5.8.3 Flooring shall be obtained from a single manufacturer once the system is

approved. 5.8.4 Coordinate location of electrical WORK in under floor cavity to prevent

interference with access flooring pedestals. 5.8.5 Access floor system shall be guaranteed by a quality management system

according to ISO 9001. 5.8.6 Environmental Condition: do not proceed with installation of access flooring

until installation area is enclosed and has an ambient temperature of between 55°F and 90°F and a relative humidity of not more than 70%.

5.8.7 Deliver access-flooring components in original unopened packages, clearly

labeled with manufacturer's name and item description. 5.8.8 Handle and store packages containing access flooring in a manner that avoids

overloading building structure. 5.8.9 Do not proceed with installation of access flooring until after substantial

completion of other as performable construction within affected spaces.




6.0 CERAMIC TILES This section of the Transmission Material Specification Standard (TMSS) specifies the

minimum technical requirements for the procurement of the Ceramic flooring materials and systems intended to be used in Saudi Electricity Company (SEC), Saudi Arabia.

6.1 Wall and Floor Tiles for Toilet 6.1.1 Wall tiles These tiles shall be glazed and shall have the following requirements Size: 150 mm x 150 mm Thickness: 7 mm Color: Off-White 6.1.2 Floor tiles These shall be unglazed and shall have the following requirements Size: 150 mm x 150 mm Thickness: 9 mm Color: Off-White 6.2 Wall and Floor Tiles for Battery room 6.2.1 Wall tiles These shall be glazed, and shall have the following requirements Size: 150 mm x 150 mm Thickness 7 mm thick Color Ivory




6.2.2 Floor tiles These shall be unglazed and shall have the following requirements: Size 150 mm x 150 mm Thickness 9 mm Color Dove Gray. The tiles shall comply with SSA 1031, BS6431& ANSI with following

technical specifications:

Typical Value Property Wall Floor

Flatness Deviation

±0.50%

±0.50%

Water absorption

14%-16%

3% –6%

Coefficient of linear thermal expansion

Less than 9 x 10-6 / K

Less than 9 x 10-6 / K

Hardness –Mohs scale

Less than 3

5 – 8

Modulus of Rupture

Greater than 20 MPa

Greater than 30 MPa

Acid/Alkali resistance

Resistant

Resistant

Crazing Resistance

Resistant

Resistant

Size Deviation

±0.50%

±0.50%

Thickness Deviation

±5%

±5%

Abrasion resistance

Not required

Class 2-5

Inside angle bead, inside elephant, inside corner, inside cover tile shall be provided

for complete tile installation. 6.3 Installation of Ceramic Tiles Ceramic tile installation shall be as per TCA Handbook for Ceramic Tile Installation

and drawings as specified in SOW/TS.

floor systems for substation 78-tmss-12-r0

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