02 General Specifications-For All Project

Proposed Warehouses (G+M) and Service Block Client: M/s GRAND STORE L.L.C. Plot No WT-05, DWC, Dubai. General Specifications Project No. 537-OI Period: November 2013

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TABLE OF CONTENTS Section No.

Description

Page Nos.

Section 1000

Preliminaries..................................................................

2 15

Section 2000

Excavation and Earthworks...........................................

16 30

Section 2300

Piling Works...................................................................

31 38

Section 3000

Concrete Works.............................................................

39 84

Section 4000

Masonry Work...............................................................

85 94

Section 5000

Metal Works...................................................................

95 - 115

Section 6000

Carpentry and Joinery....................................................

116 - 123

Section 7000

Thermal and Moisture Protection........................................

125 132

Section 8800

Glazing.............................................................................

133 143

Section 9000

Finishes................................................................................

144 159

Section 9900

Paint and Decoration............................................................

160 167

Section 15400

Plumbing Installation............................................................

168 178

Section 15500

Fire Fighting System..........................................................

179 194

Section 15600

Fire Detection and Alarm System.......................................

195 208

Section 15800

Air Conditioning and Ventilation Installation System.....

209 270

Section 16000

Electrical System.......................................................

271 - 331



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SECTION 1000

PRELIMINARIES / GENERAL ITEMS



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Section 1000 PRELIMINARIES / GENERAL ITEMS 1000.1 SCOPE OF WORK The work shall comprise the Construction, Completion, Maintenance and handing over of the project Proposed Construction of Warehouses (G+M), Service Block and External Works at plot no. WT 05 at DWC, Dubai, comprising of:

a) Warehouses Building (G+M)

b) Service Block

c) Other works comprising of Interlocking tiles, Boundary Wall, Gates & Plinths protection, etc. All complete as specified, detailed on drawings and to the approval of the Engineer. 1000.2 DRAWINGS

i. Design

(a) Consultant will provide preliminary design and general specification for the project and the Contractor shall be responsible for the final structural & electro mechanical design, which shall include all necessary construction and workshop drawings.

(b) Contractor will be responsible for satisfactory performance of the building.

(c) The Contractors must ensure that all works shall in complying with statutory authority requirements and standards

ii. Drawings A list of Contract Drawings available with the Tender is attached to these Specifications



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1000.3 ABBREVIATION OF STANDARDS The following abbreviations have been used for the Standard applicable to the Works under the Contract. BS - British Standards CP - Code of Practice ASTM - American Society for Testing and Materials ACI - American Concrete Institute ISO - International Organization for Standardization ANSI - American National Standards Institute AASHTO - American Association for State Highways & Transportation Officials DIN - Deutshes Institute for Normung SEN - European Standards Adopted as British Standard EN - Euro norms Harmonized Standards UL - Underwriters Laboratories, Inc. IEC - International Electrotechnical Commission CENELEC - Committee European de Normalisation Electrotechnique Referenced Standards are part of the Contract Documents and have the same force and effect as if bound with this Specification. 1000.4 DEFINITIONS Wherever in the Contract Documents, or on Drawings, the words as directed, as described, as ordered, as requested, as required, as permitted or words of like import are used, it shall be understood that the direction, description, order, request, requirements or permission of the Engineer is intended. Similarly, the words approved, acceptable, satisfactory and words of like import shall mean approved by, acceptable to, or satisfactory to the Engineer. 1000.5 INCONSISTENCY IN CONTRACT DOCUMENTS The Contractor shall execute the Works according to the provisions of the Contract Documents. Any work indicated in one of the documents but omitted and/or not stated in one or more of the other documents shall be treated as though it were included in all of them. Any discrepancies between the quantities or their descriptions in the Bills of Quantities, the Specification and/or the Tender Drawings, shall be referred for clarifications prior to the submission of the Tender which shall be clarified as Addendum to the Tender. Any discrepancies noted after the Tender has been accepted shall be referred to the Engineer for a ruling. The ruling of the Engineer shall be final and binding on the Contractor and the Contractor shall execute the works accordingly without any increase in cost or extension of time to the Project. 1000.6 ERRORS IN COMPUTING CONTRACT DOCUMENTS The Contractor shall be responsible for any error which he makes in computing any quantities of material and labour required or costs involved or through any lack of knowledge of the site or misunderstanding of anything shown or implied on the Drawings or in the Specifications and/or Bills of Quantities. The Contractor must refer any discrepancy in the Drawings or the Specifications to the Engineer before proceeding with any of the Works. The decision of the Engineer as to the interpretation of the discrepancy will be final as specified above under the inconsistency in Contract Documents. 1000.7 USE AND PROTECTION OF SITE



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The Contractor shall be responsible for the security of the site including his own and Sub-Contractors work, plant, materials, etc., and the safety of public and adjoining property, and shall be liable for any claims arising for any loss or damage suffered.

The Contractor shall protect the Site during the course of the Works as directed by and to the entire satisfaction of the Engineer. Site Hoarding The contractor shall provide and maintain hoarding around the site protection of the site for security and safety. The hoarding shall be Corrugated Aluminum sheet panels with frame (this part will be for front elevation only, for other three sides to be 12mm thick commercial plywood erected on painted timber supporting structure suitably braced to ensure stability and safety on all sides of the site to the approval of the Engineer. The hoarding shall be painted in plain colour with consultant (CCE) as shown on drawings & contractor logo and the Client Logo (same will be provided). The fresh look of the hoarding shall be maintained at all times until completion of the works. Adequate number of entrances with gates/barriers shall be provided at suitable locations and shall be manned at all times as approved by the engineer. The Contractor shall not load permit any part of the structure to be loaded with a weight that will endanger its safety. Areas surrounding the latrines shall be deodorized.

1000.8 SCAFFOLDING

The Contractor shall provide, erect, maintain, dismantle and clear away at completion proper and adequate scaffolding including that required for Sub-Contractors and Specialists. Putlon holes should be made good to match the adjacent surface as the scaffolding is dismantled. The Contractor shall be entirely responsible for all safety precautions in connections with the scaffolding and for its entire sufficiency for the work.

1000.9 PROTECTION OF THE WORKS AND THE PUBLIC

In pursuance of his obligations under the Conditions of Contract the Contractor shall wherever required or directed by the Engineer cover up and protect the Works from the weather and from damage by his own or other workmen performing subsequent operations. He shall provide all necessary dust sheets, barriers and guard rails etc. and clear away same at completion. 1000.10 SEPARATE CONTRACT

The Employer reserves the right to let other separate Contracts in connection with this work under similar conditions. The Contractor shall afford other Contractors reasonable opportunity for the introduction and storage of their materials and the execution of their works, and shall properly connect and coordinate his work with theirs.

1000.11 SHEDS

The Contractor shall erect and maintain ample temporary and watertight sheds for proper storage and protection of his own and Subcontractor's materials. Cement and other perishable material shall have floors raised 150 mm off the ground. The Contractor shall clear away at completion and make good all work disturbed. 1000.12 ADVERTISING



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The Contractor shall not affix or place any placards or advertisements of any description or permit the same to be affixed or placed in or upon any hoardings, gantry, building or structure other than that approved by the Engineer. 1000.13 APPROVED, DIRECTED, SELECTED

The terms "approved", "directed" or "selected" mean the approval, direction or selection of or by the Engineer. 1000.14 LEGAL AUTHORITY WORKMEN

The Contractor shall at all times give access to workmen employed by the Local of other Authorities and provide with proper, sufficient and if required special scaffolding, hoists and ladders and provide them with water and lighting and leave or make holes, grooves, chases etc., without extra charge 1000.14.1 NO OBJECTION CERTIFICATES (NOCS)

The said to be obtained from all authorities by the main contractor. 1000.15 KEEPING THE SITE FREE FROM RUBBISH The Contractor shall keep the building and the site free from rubbish during the progress of the work and at completion, including that of Subcontractors and Local Authority, or special tradesmen. All materials condemned by the Engineer are to be removed immediately and replaced at the Contractors expense.

1000.16 MATERIALS TO BE IMPORTED

The Contractor will be required to produce documentary evidence that all materials to be imported have been ordered within 8 weeks after the Contract has been signed. This means materials which are not obtainable on the local market and which have to be ordered especially from abroad. As soon as orders have been placed, copies of such orders shall be submitted to the Engineer.

1000.17 MATERIALS, GOODS AND WORKMANSHIP GENERALLY

The whole of the workmanship, goods and materials incorporated in the works shall be new and of the best quality available and shall be to the approval of the Engineer. Should the Engineer discover on the Works any materials other than those approved he may order their removal from the Site. 1000.18 BRITISH STANDARD

In this and in any other Contract Documents and/or drawings the letters "B.S." followed by a number will refer to the edition of the British Standard current at the time of tendering. Reference to British Standards shall not preclude the use of materials from sources where other standards apply, but no materials to be incorporated in the works shall be in any respects inferior to those which specifically comply with the relevant British Standard. 1000.19 COORDINATION OF BUILDERS WORK

The Contractor shall coordinate the requirements for holes, fixings and other similar builders work. The Contractor shall ensure that such builders work as shown on the drawings is in accordance with his own and his Subcontractor requirements. Details of holes, fixing, etc., which are not shown on the drawings but are required by the Contractor or Subcontractors, shall be forwarded to the Engineer for his written



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approval at least three weeks before work proceeds. No holes or fixing shall be formed without prior approval by the Engineer. No claim will be entertained for work executed abortively due to lack of coordination. 1000.20 TEMPORARY WORKS

The Contractor shall furnish to the Engineer full particulars, drawings etc. of all temporary works necessary for the execution of the Work and shall allow sufficient time for the Engineer to consider the same. The Engineer reserves the right to comment on the Contractor's proposals if he considers that modification should be made, but the Contractor shall solely be responsible for the stability and safety of all temporary works and unfinished permanent works and for the quality of the permanent works resulting from the arrangement eventually adopted for their execution.

1000.21 TEMPORARY ROADS

The Contractor shall form all temporary roads crossover footpaths tracks hard standings etc. within the Site.

1000.22 WORK REASONABLY INFERRED

The Contractor shall execute the Work in accordance with the intent and meaning of the drawings and Specification taken together and shall supply all accessories and other items essential for the proper execution of the work and shall execute all work which may be reasonably inferred whether or not specifically shown or described.

1000.23 PROTECTING FINISHED WORKS

The Contractor shall carefully protect his own finished work, the work of Subcontractors or the work of Local Authority workmen and he shall be liable for the re-instatement of any work damaged during the progress of the work, caused by any reason whatsoever.

1000.24 CUSTOMS AND LOCAL DUTIES All state dues, tolls rates, duties, fees and charges in connection with the Works shall be deemed to be included by the Contractor in his contract unit rates. 1000.25 EXPATRIATE LABOUR The Contractor shall make his own arrangements for the engagement of expatriate labour and staff if required and for the housing, health, welfare and repatriation of same and shall conform in all respects with the conditions and requirements of any law and of any regulations or orders of the government of the country wherein the site is situated or any Authority which may be applicable including such law, regulation or order passed or made or coming into force after the date of tender and/or during the execution of the Works.

1000.26 ALTERNATIVE MATERIALS In the event of the acceptance of any alternative materials or items a suitable price reduction shall be made in respect of any decrease in value but no price addition shall be made in respect of increase in value. Should the contractor wish to offer alternative items or materials to those specified he shall supply details of such alternatives together with details of any reduction in the contract price should the alternative be allowed to be substituted for the specified items or materials. All offered alternatives shall



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comply fully in respects with the specifications of the particular items or materials. Acceptance or refusal of any alternatives will be entirely at the discretion of the Engineer. If during the course of the contract certain materials or items required for use in the works should be unobtainable, despite the best effort of the contractor, the contractor may offer for the approval of the Engineer alternative materials or items, provided that they posses the minimum requirements of the originally specified materials. In the event of acceptance of any alternative materials or items a suitable price reduction shall be made in respect of any decrease in value but no price addition shall be made in respect of increase in value. In the event of refusal of any alternative materials or items the contractor for any loss occasioned by his failure to provide the materials or items as specified. No claims shall be entertained or considered from the contractor for any loss of time due to the process of investigation study and approval by the Engineer. In the event of refusal of any alternative materials or items, the Contractor shall not be relieved of any of his obligations under the contract and shall be solely liable if any delay or loss occasioned by his failure to provide the material or items as specified. 1000.27 ATTENDANCE

The Contractor shall allow for the attendance of one trade upon another and shall execute and make good all necessary chases, holes, mortises, channels, etc. in any materials and shall provide all necessary attendance on Sub-Contractors.

1000.28 COMPETENCE OF TRADESMEN

Only competent and experienced tradesmen who have proven their ability in performing their specialist trades shall be employed on the work.

1000.29 DIMENSIONS Figured dimensions only shall be followed. No dimensions shall be scaled from drawings. 1000.30 SAMPLES AND TESTING OF MATERIALS

Prior to ordering or delivering any material or manufactured items to the Site the name or names of the Manufacturer(s) and, where required by the Engineer, adequate samples, with full product details, technical data, sample schedules and manufacturer's certificates of all the materials and goods to be used in the Works shall be submitted to the Engineer for approval and in the case of rejection further samples to be submitted until such are approved. If judged necessary by the Engineer, the samples shall be tested for compliance at the Contractor's expense in a laboratory designated by the Engineer, and finally approved samples shall be retained in a separate room on the site and not used in the work without the written permission of the Engineer. 1000.31 SHOP DRAWINGS

The Contractor shall furnish the Engineer with any shop drawings which he shall reasonably require, detailing materials, layouts, sizes, dimensions, etc., clearly and neatly. Such drawings must be provided at least ten days prior to the commencement of the relevant work on site. No such work shall be put in hand until the Engineer's approval of shop drawings has been obtained in writing. 1000.32 DELIVERY, HANDLING AND STORAGE OF MATERIALS



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All materials or manufactured items that are liable to damage shall be delivered in the original package, containers, etc. bearing the name of the manufacturer and the brand. Materials or manufactured items shall be carefully loaded, transported, unloaded and stored in an approved manner, protected from damage and exposure to weather or dampness during transit and after delivery to the Site. Damaged material or manufactured items shall not be used in the work. Any material or manufactured items damaged during and after fixing in position shall be removed, repaired or replaced by and at the Contractor's expense as required by the Engineer. 1000.33 WATER FOR THE WORKS

The Contractor shall provide water for the Works including that required by Subcontractors, pay all charges and provide all necessary temporary pipework, pumps, storage tanks, etc., and remove on completion, and make good all work disturbed. Any cost of importing water by tanker and storing on site, should this prove necessary, shall be allowed for by the Contractor. No extension of time will be granted due to failure of and dependence upon a main water supply. 1000.34 ELECTRICITY FOR THE WORKS

The Contractor shall provide electric light and power for the Works including that required by Subcontractors, pay all charges and provide all temporary installations and remove on completion and make good all work disturbed. Any cost of Temporary Electricity generating equipment, should this prove necessary, shall be allowed for by the Contractor. No extension of time will be granted due to failure of and dependence upon a main electricity supply.

1000.35 EXISTING SERVICES

The Contractor shall allow for ascertaining for himself the position of any live services within the confines of the site. Any accidental damage must be reported to the Engineer immediately and the Contractor shall be liable for any charges incurred for repairs.

1000.36 ACCIDENTS

The Contractor shall promptly report by telephone and in writing to the Engineer any accident whatsoever arising out of or in connection with the performance of the work whether on or adjacent to the Site which caused death, personal injury or property damage, giving full details and statements of witnesses. If any claim is made by anyone against the Contractor or any Subcontractor on account of any accident, the Contractor shall promptly report the facts in writing to the Engineer giving full details of the claim. 1000.37 CLEANING AT COMPLETION

The Contractor shall clean the whole of the buildings at completion to the Engineers satisfaction and leave the work and the Site tidy and the buildings ready for immediate occupation. The Contractor shall clean all windows inside and out, clean and leave in a proper condition all sanitary fittings, etc., to the satisfaction of the Engineer. Immediately prior to handing over the building for occupation, the whole of the drain pipes and gullies are to be cleared of any obstruction, debris and superfluous matter by rodding or other approved means.



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1000.38 PHOTOGRAPH AND ADVERTISING

The Contractor shall supply once a month, as directed by the Engineer, three unmounted sets of coloured photographs. Each set shall comprise of five (5) photographs of size 20 x 25 cm, showing the progress of the works.

1000.39 ENGINEER'S SITE OFFICE

The Contractor shall provide and maintain on the site for the duration of the Contract a temporary office for the accommodation of the Engineer and staff.

a) This office and facilities shall comprise of: - 2 Rooms of 12 metres square each. - Separate sanitary facilities. - Electric outlets and lamps. - Hot and cold water. - Elevated water tank 10(ten) m3 capacity. - Split Air conditioning units. - 2 desks with 3 swivel chairs. - 10 chairs. - Fire extinguishers as necessary. - Conference table with chairs. - One small refrigerator with approx. 12 c.ft. capacity. - One samples rack as required by the Engineer. - 1 filing cabinet. - 1 Laptop (latest specifications). - Internet Facilities - Photocopier - One telephone line (all local calls charges within the UAE including rental charges to be borne by the Contractor) for the sole use of the Engineer. - Provision of stationery for site office use as required by the Engineer. b) The Contractor shall provide covered car park to accommodate two cars, exclusively for Engineer's staff. An extra covered car park shall be provided for the Employer.

c) The Contractor shall provide 2 Nos. approved Sign Boards written in Arabic and English.

The size of the Sign Board and Lettering including the wordings shall be as directed by the Engineer.

1000.40 TOILET FACILITIES The Contractor shall provide and maintain clean portable toilet facilities. The Contractor shall include in his contract sum for the above provision as applicable. The Contractor shall not use the permanent facilities within the building. 1000.41 SIGN BOARDS 2 Nos. Illuminated Primary sign boards shall be provided in Arabic and English giving the names of the EMPLOYER, PROJECT, ENGINEER and MAIN CONTRACTOR only, and strictly in accordance with the format attached herein. However a perspective view of the project mounted in a suitable glass frame and illuminated adequately shall also be fixed on the board. The size of this perspective view will be as agreed with the Engineer.



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The signboard shall consist of a supporting structure securely anchored to the ground and with sign plates fitted on it. All working details including sitting and positioning shall be submitted for approval and shall be approved before fabrication or erection commences. The sign boards shall be properly illuminated to the required illumination levels and good Engineering Standards and to the approval of the Engineer. The Contractor shall comply with current regulations of the Municipality and obtain approval of the Municipality. The Contractor shall keep clean and maintain the signboards and remove them and make good all works disturbed upon completion of the Contract. The Contractor shall provide space for signboards and pay all costs in connection with them including Municipality fees. 1000.42 PERIODIC REPORTS

This report shall be submitted to the Engineer by the 5th day of each month. The exact format for the report will be mutually agreed between the Engineer and the contractor, as a minimum, it shall include the following:-

a) Labour force working during that period. b) Quantity and quality of materials and equipment used during that period. c) Report of actual date of arrival of approved materials at site. d) Detailed quantity of work executed and description. e) Climatic conditions with special reference to any direct effect they may have on the Works. f) Unforeseen circumstances (if any) which may hamper the progress of the Work. g) Graphs showing the relation between the executed portions of the Works and the corresponding

portions in the work programme. h) Copies of the important correspondence exchanged between the Engineer and the Contractor

during that period. i) Copies of the important site instructions issued to Contractor by the Engineer during that period. j) Copies of the minutes of meetings held during that period. k) Executive summary narrative highlighting major home office (if applicable), local office and

construction worksite activities accomplished during the month. l) Status of works, overall and a comparison between planned and actual areas of concern. m) Proposed remedial actions recommended correcting stated situations and avoiding potential

problems. n) Effectiveness of remedial actions taken previously. o) Narrative and summary of drawings / documents progress actual versus planned. p) Narratives and summary of subcontract award progress actual versus planned. q) Narrative and summary of procurement progress actual versus planned. r) Construction progress activities performed and progress achieved, actual versus planned by

sub-contractors and overall construction. s) Plans and schedules during important activities in the immediate future, updates and forecasts. t) Site materials delivery details and forecasts including specific information on late materials

deliveries likely to affect progress. u) Progress, productivity and man-hour data to include planned; actual and forecast progress

together with trend identification and analysis by each sub-contract. v) Project schedule status, highlighting the status of critical activities along with schedule trend

analysis indicating the actions proposed to be taken to ensure timely completion of the Project. w) Project milestone status. x) Drawings and materials hold-up analysis and report. y) Productivity analysis for each sub-contractor. z) Project trends summary.

The Contractor shall prove to the Engineer's Representative upon his request the correctness of the above mentioned reports without having the right to use such documents to support a claim for any extra payment or compensation whatsoever in regard or in relation to such reports.



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1000.43 SITE PROGRESS MEETINGS

During the course of the Works, Site progress meetings shall be held at regular intervals at least once every two weeks in the presence of the Engineer for the purpose of coordinating the Contractor's works. Minutes of such Site meetings will be recorded, copies will be distributed to all persons concerned and full effect shall be given to all instructions contained therein. The Contractor shall have no claim against the Employer for costs incurred by him in changing the method of working or in the provision and use of other additional plant.

1000.44 PROGRESS REPORTS

The Contractor shall prepare typed site progress reports for each section of the Works for discussion at the site meetings. The progress reports shall be related to the Contractor's programme for the Works and shall state the percentage of work completed each month. The Contractor shall prepare materials schedules, listing key materials, together with dates for ordering.

1000.45 SAFETY OF ADJOINING EXISTING BUILDINGS

The Contractor shall take all necessary precautions during the excavation which are adjoining existing buildings shall protect such buildings from the damage or collapse by means of temporary or permanent shoring, strutting, sheet piling or underpinning or excavations in short lengths and/or other methods as he deems fit, also he shall properly support all foundations trenches, walls, floors etc., affecting the safety of the adjoining existing buildings. 1000.46 PROGRAMMES FOR THE WORKS

a) Two weeks after the date of acceptance of his Tender the Contractor shall submit to the

Engineer for his approval a programme showing the order of procedure, delivery of materials and methods in which he proposes to carry out the works, including the work of sub-contractors. The programme shall show the execution of each trade separated to show time for completion. The submission to the Engineer of such programme shall not relieve the Contractor of any of his duties or responsibilities under these Conditions, nor his obligations to apply in writing for instructions as required by the Conditions of Contract.

b) The Contractor shall submit three copies of programmes to the Engineer and keep one copy in

the site office. He shall record progress on a copy of the chart kept on site, and update and re-draft if any circumstances arise which affect the progress of the Works and submit copies of all revisions to the Engineer.

1000.47 SETTING OUT THE WORKS

The Contractor shall be responsible for the true and proper setting-out of the Works in relation to original points lines and levels or reference given by the Engineer in writing and for the correctness of the position levels dimensions and alignment of all parts of the Works and for the provision of all necessary instruments appliances and labour in connection therewith.

1000.48 CLEARING UP OF SITE ON COMPLETION

On completion of the Works the Contractor shall clear away and remove from the Site all Constructional Plant surplus materials rubbish and Temporary Works of every kind and leave the whole of the Site and Works clean and in a workmanlike condition to the satisfaction of the Engineer.



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The Works shall be cleaned thoroughly inside and out, removing all splashes, deposits, rubbish and surplus materials. The Contractor shall remove all temporary markings, covering and protective wrappings unless otherwise instructed. 1000.49 SAFETY, HEALTH AND WELFARE

The Contractor shall comply with enactments and regulations relating to safety, health and welfare of work people, and the public at large. The Contractor shall provide and maintain First Aid facilities on the Site to the approval of the Engineer. 1000.50 NOISE CONTROL ON WORK SITES

All plant and equipment supplied by the Contractor for use on the Works shall be effectively `sound- reduced' by means of silencers, mufflers, acoustic linings or shields or acoustic shed or screens to a level of 75 decibels (dBA) measured outside the nearest occupied property or to the satisfaction of the Engineer.

1000.51 NOMINATED SUBCONTRACTORS

Where prime cost or provisional sums are included in the Schedule of Rates or Bills of Quantities for persons to be nominated by the Engineer to supply and fix materials or to do work.

a) Such sums shall be expended in whole or in part in favour of the persons nominated by the

Engineer or wholly deducted from the Contract Sum if not required to be expended. Such persons shall be called `Nominated Subcontractors'. But no person shall be nominated against whom the contractor shall make reasonable objections or who will not enter into a Subcontract with the Contractor provided:

1) That the Nominated Subcontractor shall indemnify the Contractor against:

i) The same obligations in respect of the Subcontract as those for which the Contractor is liable in respect of this Contract.

ii) Claims in respect of any negligence by such Subcontractor, his servants, or

agents, or any misuse by him or them of any scaffolding or other plant, and shall insure himself against any such liability and produce the policy or policies and premium receipts as and when required by the Engineer.

2) That payment in respect of any work, materials or goods comprised in the Subcontract

shall not be due until receipt by the Contractor of the equivalent payment against an Engineer's certificate which includes the value of such, materials or goods.

3) That the Engineer shall have a right of access to the workshops and other places of the

Nominated Subcontractor. b) The sums directed by the Engineer to be paid to Nominated Subcontractors for work, materials or

goods comprised in the Subcontract shall be paid by the Contractor within fourteen days of receiving the equivalent payment from the Employer including the value of such work, materials or goods less only any retention money which the Contractor may be entitled to deduct.

1000.52 FIRE PROTECTION

Adequate precautions shall be taken against fire throughout all the Contractor's and Subcontractor's operations. Flammable material shall be kept at an absolute minimum, and, if any shall be properly



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handled and stored. Gasoline and other flammable liquids as well as pressurized gas tanks shall be stored in and dispensed from safety containers; however, storage of such containers shall not be within the building. Except as otherwise provided herein, the Contractor shall not permit fires to be built or open type heating devices to be used in any part of the work.

1000.53 KEEPING THE SITE FREE FROM RUBBISH

The premises and the job site shall be maintained in a reasonable neat and orderly condition by the Contractor(s) and kept free from accumulations of waste materials and rubbish during the entire construction period. The Contractor shall remove all crates, cartons and other flammable waste materials or trash from work areas at the end of each working day.

1000.54 SAFETY-GEAR Safety helmets & boots shall be worn at all times by all personnel. Of the Contractor trades requiring use of hand gloves shall be required to do so.

1000.55 LABOURER'S LINES The Contractor is to make all arrangements and bare all costs in connection with the housing of local or imported labour. No accommodation for this purpose will be provided on site premises. However, accommodation for watchman shall be provided at a location approved by the Engineer. Such housing must be kept in clean sanitary conditions and removed on completion of the Contract to the satisfaction of the Engineer. 1000.56 MAINTENANCE MANUAL

Arrange for and provide the Engineer at Practical completion with 6 No. copies of a Maintenance Manual in a 4 ring binder, size A4, with rigid plastic covers, containing guarantees and manufacturers printed brochures, and detailed instruction sheets prepared for this contract covering items of plant, equipment and control used for all works described in the Electrical and Mechanical Specifications. The manual is to contain names, address and telephone numbers of;

Installation Contractors Place where spare parts may be obtained Service Departments Include a List of Contents sheet and rigid divider sheet to separate each section. The face and spine of the manual to have approved engraved or embossed plastic labels

identifying its purpose (i.e. Maintenance Manual) together with the name of the development. The manual is to be of approved design and format, agree details with the Engineer prior to its

assembly. The manual is to contain the manufacturers' instructions for the removal of ceiling tiles in

suspended ceilings, and their refixing, together with recommendations for cleaning. The manual is to contain manufacturers' instructions for the maintenance of all plastic, stainless

steel, aluminium and enamel finishes (plain or anodized) and prescribed contents of warranty against use and mechanical wear and tear.

1000.57 AS-BUILT DRAWINGS

All prints of the drawings where required, shall be corrected by the Contractor to show work as executed and submitted to Engineer for approval as the work proceeds. These shall include "As-Built" and schematic arrangement drawings of Mechanical and Electrical Engineering installations. Upon completion of the works, the Contractor shall prepare a complete set of drawings for the project as



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executed and submit to the Engineer for approval. When approved by the Engineer, the Contractor shall submit one set of original polyesters and three prints of all drawings duly marked "As-Built". The Contractor shall not be entitled to any extra payment or extension of time for the correction, preparation and supplying of the above mentioned drawings and original polyesters. The "As-Built" drawings should show the following:

1. The complete installation, including the sizes and runs of all cables and conduit and trunking and their contents, and the size and runs of all pipework, the precise location of all pipework which may be buried within the structure.

2. The position of all underground services including electrical, cold water, telephone, gas,

drainage and sewerage services on the site together with their depths and the locations of switch and fuse gear and isolating cocks, the positions of all other apparatus.

3. Thermal or other protecting envelopes around buried services. 4. The geographical location and identification number of each fuse board, distribution

board, isolating device and control valve. 5. The manufacturers' names, model and type numbers, duty and rating of all plant

including thermostatic control equipments. Fix a print of each as-built circuit and layout diagram securely to the inside of the hinged front of the main electrical control panels, as appropriate or as agreed with the Engineer and protect by non-flammable material. Where inadequate space exists reduce the prints to an agreed size. 1000.58 GUARANTY / WARRANTY

The Contractor shall provide guaranty/warranty of the product used in the project in accordance with the specification.

1000.59SOIL INVESTIGATION The soil investigation report enclosed herein is for reference and guidance only. The Contractor shall ascertain the soil conditions on his own by carrying out necessary soil investigations as required. It shall be the responsibility of the contractor to ensure that the minimum design soil strength is met with. Any modification required to the foundations or the soil strata under the foundations to satisfy the design requirements shall be carried out at no extra cost and/or time to the Contract. The Contractor shall however submit all the necessary details of his findings and his proposed modifications for the approval of the Engineer before commencing work. However, any such approval accorded shall not relieve the Contractor of any of his contractual obligations and responsibilities.

End of Section



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SECTION 2000

EXCAVATION AND EARTHWORKS



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Section 2000 EXCAVATION AND EARTHWORKS 2000.1 SCOPE All necessary work required for excavation and site preparation, removal of existing structures, backfilling, disposal of surplus excavated material, site survey, take levels and other sundry works in accordance with the Drawings and/or Bills of Quantities and as directed by the Engineer and in full compliance with the local authorities requirements. 2000.2 SITE INFORMATION The Contractor shall be deemed to have visited the Site of Works and satisfied himself as to the nature of the ground and made himself conversant with the local conditions to be encountered during the execution of the Contract. 2000.3 EXISTING SERVICES The Contractor shall ascertain the whereabouts of all existing services on the Site, both above and below ground. Such services shall be protected, maintained, removed, sealed or re-routed in a manner prescribed by the Public Authorities concerned at the Contractor's own expense as specified under "Locating, Protecting Maintaining and Diverting Services and Public Utilities" in Section 01". Excavations to locate services shall be carried out by hand. 2000.4 SETTING OUT The Contractor shall stake-out the work as shown on the Drawings and secure the Engineer's approval of his stake-out before proceeding with construction. If, in the opinion of the Engineer modification of the line or grade is advisable before or after stake-out the Engineer will issue the detailed instructions in writing to the Contractor for such modification and the Contractor shall revise stake-out for further approval as instructed by the Engineer. The Contractor shall perform all excavations to true lines, widths and depths shown on the Drawings or to such further lines, depths or dimensions as may be directed by the Engineer to reach suitable bearing strata. 2000.5 MATERIAL Backfill and imported fill material shall be any structurally sound material obtained either from excavations or from borrow pits, approved by the Engineer. The material shall in general comprise non-plastic granular matter, and well graded. It shall be free from organic or other perishable items and shall not contain an excess of fines. Suitable Material for fill shall comply with the following limits: Liquid Limit (AASHTO89) 30% max (ASTMD423) Plasticity Index (AASHTO T90) 6% max (ASTM D424) Total Water Soluble Salts 5% max The nature of the materials shall govern both their acceptability for backfill and methods best suited for their placement and compaction in backfill.



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The following definitions of Earthwork materials shall apply; -Sweet Soil: shall be fertile, friable soil obtained from well drained arable land and shall be free draining, non toxic and capable of sustaining healthy plant growth. -Suitable Material shall be approved soil obtained from excavations within the works or from borrow pits approved by the Engineer as specified. -shall not contain fines in excess of 20% passing No.200 sieve (ASTM Cl 17) or in excess of 2% organic materials (BS 1377: Part 3). -maximum particle size shall not exceed 75 mm. -shall not be susceptible to spontaneous combustion. -shall not contain any other material which the Engineer may deem to be unsuitable for earthworks. -Screened Gravel (Structural fill): shall be material as directed by the Engineer and comply with the specification. Test Standards Los Angeles Abrasion ASTMC 131 40% max. Soundness (Na2So4 Solution) ASTM C 88 12% max. Liquid Limit ASTM D 4318 25% max. Plasticity Index ASTM D 431 86% max. Compaction test ASTM D 1557- (Modified Proctor) (Method D) C.B.R. at 100% of modified (ASTM D 1883) Proctor density (96 hr soaked) 80% min. Field density ASTM D 1556/D2922 100%min. Sulphate Content BS 1377 (part 3) 0.5%max. Chloride Content BS 812 (Part 1.1. 7) 1 % max. -moisture content of the compacted material shall not vary more than 3% of the optimum moisture content (OMC).

2000.5.1 Structural Fill A. Sound, clean, durable, granular materials free from deleterious matter and in accordance

with the following gradations:

ASTM Sieve Total % Passing by Weight



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51mm 100 38mm 70-100 25mm 55-85 19mm 40-70 9mm 30-60 No. 4 30-60 No.10 20-50 No. 40 10-30 No. 200 5-15

B. Gradiations in the table above represent the limits which shall determine suitability of aggregate for use from the sources of supply.

C. Structural fill may be classified as well graded granular soils- group 1 (non-plastic soils with

a uniformity coefficient exceeding 10).

D. Use structural fill under mat concrete slabs, sidewalks, paving, under utility pipes, and at other soil bearing situations for fill within 300mm measured horizontally of foundation walls, retaining walls, edges of footings and other below-grade vertical surfaces as approved by the Engineer, except where drainage fill is indicated or specified.

E. If sufficient structural fill material is not available from excavation under this Contract, then

additional fill, suitable for use, shall be brought to the Site from other sources. Both excavated material from the Site for use as structural fill, and material brought to the site for use as structural fill, shall meet the above requirements.

2000.5.2 Ordinary Fill A. Ordinary fill shall be natural soil, well-graded and free from all organic, weak, compressible

and expansive materials (such as high plastic clays) and also free of materials subject to decay or decomposition, and shall contain no stone larger than 150mm in maximum dimension.

B. Ordinary fill may be classified as uniformly graded material Group 2 (non-plastic soil with a

uniformity coefficient of 10 or less).

C. Use ordinary fill for general grading and backfilling except in areas where structural or drainage fill is required.

D. If sufficient ordinary fill material is not available from excavations under this Contract, then

additional fill, suitable for use, shall be brought to the Site from other sources. Both excavated material from the Site for use as ordinary fill, and material brought to the Site for use as ordinary fill, shall meet the above requirements.

2000.5.3 Drainage Fill A. Drainage fill shall be fine aggregate, clean, well-grade, free-draining sand, complying with

ASTM C33.

1.Drainage fill material shall be placed where called for in the Specification or Drawings, (e.g. under pipe and utility trenches).

2000.6 REQUIREMENTS AND TESTING The following requirements, tests and frequencies shall be followed:



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Density and OMC for each fill material as defined by ASTMD1557 Method D and determined in an approved laboratory shall be referenced to the Engineer. The percentage of compaction shall be determined by the percent of maximum dry density at OMC in accordance with ASTM D 1 557 Method D. The area of excavation and the length of trench open at any one time shall be controlled according to the site conditions and subject to limits as directed by Engineer. Gradation Analysis - one test per 4,000 m3 of excavated material on-site stockpiled for use as compacted on-site fill material and as instructed by the Engineer. -Liquid Limit and Plastic Limit and Plasticity Index - One test per 4000 m3 of excavated soil on-site stockpiled for use as compacted fill material and as instructed by the engineer.

-Moisture Density - One per 4000 m3 of soil placed and/or whenever visual inspection indicates a significant change in material gradation. -In-Place Density - Areas greater than 1 00 m2; one per 800 m3 placed, or one per alternate lift, whichever results in a greater frequency, Minimum percentage compaction. Areas 100 m2 or less; one per every half (1/2) meter of compacted fill. -Screened Gravel: (Structural Backfill) Contractor's to provide sufficient tests conducted by approved testing laboratory to ensure fill material in accordance with the specification and compaction equipment are well in use. -Gradation Analysis - One from each source and where there is significant change in material gradation.

2000.6.1 Testing of Materials

The Soil Testing Laboratory shall perform all tests herein specified and any additional tests as may be required and submit test reports to the Engineer, including the following:

A. One optimum moisture maximum density curve for each type of soil

encountered in Subgrades and fills under a raft foundation and slabs on grade and paved areas. Determine maximum densities in accordance with ASTM D1557.

B. Each type of borrow material shall receive: 1) Mechanical Analysis ASTM D422/AASHTO T88. 2) Moisture-Density Curve Determination ASTM D424/AASHTO

T91 3) Moisture-Density Curve Determination ASTM 1557 4) Four CBR test as a measure for bearing capacity under raft foundation 2000.6.2 Testing of Subgrade and Fill Layers

Subgrades and fill layers shall be approved by the Soil Testing Laboratory and the Engineer before construction of any further work thereon. Tests of Subgrades and fill layers shall be taken as follows:



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A.The top 300mm of subgrade resulting from excavation shall have a maximum density at optimum moisture as here-in-before specified. In fill areas, each layer of fill shall meet the required density as here-in-before specified. Make at least one (1) field density test of the subgrade for every two hundred square metres (200m2) of paved area or slabs on grade, but in no case less than three (3) test. Perform field density tests in accordance with ASTM D1556 or ASTM D2167.

B. At foundation wall backfill take at least eight (8) field density tests (ASTM 1556 or ASTM D2167) at locations and elevation as directed by the Engineer.)

2000.6.3 Cooperate with the Soil Testing Laboratory in every respect in the performance of the

required tests. 2000.6.4 If, based on reports of the Soil Testing Laboratory and inspection, the subgrade or backfill are found to be below the specified density, the Engineer may require additional compaction and testing and all this shall be carried out at the expense of the Contractor.

2000.7 COMPACTION REQUIREMENTS Suitable fill material shall be compacted to 95% maximum dry density. Suitable fill material placed within 150mm of formation level shall in addition have a minimum soaked CBR value of 15 percent at 95% maximum density as determined by the modified proctor AASHTO test carried out in accordance with BS 1377 test no.13. 2000.8 PROCEDURE IN EVENT IN EVENT COMPACTION BEING UNACCEPTABLE If the material deposited as fill subsequently reaches a condition such that it cannot be compacted in accordance with the requirements of the contract, the contractor shall at the Engineers discretion, either; 1-make good by removing the material and replacing it with suitable material. 2-Make good the material by mechanical or chemical means to improve its stability

3- Cease work on the material until its physical condition is again such that it can be compacted as described in the contract.

Any of the method used subject to Engineers approval In no case the contractor is allowed to compact soil without the knowledge of the Engineer. If compaction is carried out without such permission, the engineer will require additional density tests to verify the adequacy of the compacted soil. If the state of compaction is thereby shown inadequate the contractor shall at his own expense carry out such further work as the Engineer may decide is required to comply with the terms of the contract. 2000.9 EXISTING SERVICES The Contractor shall ascertain the whereabouts of all existing services on the Site, both above and below ground. Such services shall be protected, maintained, removed, sealed or rerouted in a manner prescribed by the Public Authorities concerned at the Contractor's own expense as specified under "Locating, Protecting Maintaining and Diverting Services and Public Utilities" in Section 01". Excavations to locate services shall be carried out by hand. 2000.10 TOLERANCES



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Finished surfaces shall be constructed to plus or minus 25 mm of the elevations as indicated on construction drawings. Cut and fill areas shall be graded to within plus or minus 60 mm of the grades indicated. The Engineer shall be provided with adequate survey information to verify compliance with above tolerances. Moisture content of fill material shall be maintained within _ 2 % of optimum moisture content (OMC) as specified in the case of structural backfill. 2000.11 SUBMITTALS The Contractor shall submit the following for the approval of Engineer. -Detailed sequence of work, description of construction methods, including dewatering and erosion control measures. Formulated schedule and procedures to eliminate possibility of undermining or disturbing foundations of partially and completed structures, pipelines and embankments or existing structures. -Information on proposed compaction equipment at least two weeks prior to use. Compaction operations shall not be commenced until the equipment has been reviewed and approved by the Engineer. -Details of dust control measures at least two weeks prior to start of any earth moving activities. -Locations of proposed borrow sources for screened gravel and selected borrow, at least two weeks prior to use of material. -Laboratory test results every week or as required by the Engineer. -Written verification of fill lift thickness and compaction weekly or as required by the Engineer. -Tamping tools adapted for the backfilling of retention system voids after its removal. 2000.12 WORKMANSHIP 2000.12.1 Excavation

Excavation shall be carried out in all materials and by whatever means necessary, accurately to the lines and levels on the drawings or as ordered by the Engineer. The Contractor shall trim all permanent excavations to slopes gradients shown on the drawings and surfaces shall be smooth unless stated otherwise. Any additional excavation occasioned by slips, falls, washings etc. shall be made good at material as ordered by the Engineer.

a. Tolerance

The tolerance limits in general shall be:

Finished surfaces shall be constructed with in +/- 25mm of indicated levels. Cut and Fill shall be +/- 60mm of the grades indicated. Embankments shall be +/- 60 mm of the slope lines.

b. Finish of Excavation and Inspection

The Engineer shall be provided with the adequate information of the survey to verify compliance with the tolerances.



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No excavation shall be refilled nor any permanent work commenced until the formation has been inspected by the Engineer and his permission to proceed. If required by the Engineer the bottom 150 mm of the excavation shall not be removed until just before the commencement of the construction of permanent work.

c. Dewatering

Where the excavation level is under the water table level, it is necessary to install special form of dewatering equipment around the perimeter of the excavated area. The Dewatering amount will be deducted from the contract value if the same has not been executed. The excavations shall at all times be kept free from storm water, percolating water or subsoil water by any means necessary. The contractor shall provide, maintain and clear away on completion any equipment necessary together with temporary drains and the like. Under no circumstances shall concrete be poured, fill placed, pipes laid or appurtenances installed in excavations containing water. Where the excavation level is below the natural water table and it is necessary to pump continuously form the excavation or to install a specialist form of dewatering equipment around the perimeter of the site or excavation, the Contractor will be responsible for ensuring the safety and stability of all adjoining structures and services or utilities above or below ground level. It will also be the responsibility of the Contractor, the equipment installed, shall ensure the excavation and subsequent construction shall be carried out in dry conditions. Continuous or permanent dewatering of the excavation or site may not be undertaken without the written approval of the Engineer to the work and the methods to be employed, which shall also comply with Codes of practice and local authority requirements. The water pumped from the excavations or well points shall be pumped to disposal points or sumps as approved by the Engineer and/or Local Authority and if so required be passed through settling tanks before disposal. Under all circumstances, water must be disposed off to the Municipality's sewer systems or as instructed by them. The de-watering system catering for de-watering upto about 50 cm below the final excavation level of the bottom of the blinding concrete of the pile-cap/raft shall be handed over by the Piling Contractor at the commencement of the project. If the dewatering system does not maintain the groundwater level to obtain the specified sub grade conditions, the Engineer shall be notified and the system shall be modified appropriately at no additional cost to the Client. If dewatering system causes sub grade soils to be unable to meet density requirements due to dewatering interruptions or an inadequate system, notify the Engineer and modify the system to perform as specified at no extra cost to the Client. The Contractor shall submit the following for the approval of the Engineer: Shop drawings to a scale agreed with the Engineer. Drawing shall indicate the locations and sizes of berms, dikes, ditches, all deep wells, observation wells, sand and gravel filters, settlement points, well points, sumps, recharge systems and discharge lines, including their relation to sedimentation ponds. Capacitates of pumps, prime movers, and standby equipment



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Unless otherwise specified, continue dewatering uninterrupted until the structures, pipes, and appurtenances to be built there have been completed such that they will not be floated or otherwise damaged by an increase in ground water elevation.

Dewatering Discharges

Install sand and gravel filters in conjunction with well points and deep wells to prevent the migration of fines from the existing soil during the dewatering operation. Transport pumped or drained water, without interference to the other work, damage to pavement, other surfaces, or property discharge pumped water to a sedimentation pond or drainage system or as approved by the local Municipal Authorities. Do not discharge water into any storm or sanitary sewer system. Discharged water must be visible or allowed to be observed to verify compliance with U.A.E Regulations. Provide separately controllable pumping lines. The Engineer reserves the right to sample discharged water at any time.

Materials for backfilling shall comply with and be laid in accordance with BS'6031 1981 Code of practice for earthworks. Approved suitable excavated material as specified under "Materials shall be used on the backfilling and filling next to footings, foundations, underground structures, under sub- floors, etc. and shall be laid in layers not exceeding 200 mm thick and compacted with compaction equipment or mechanical tampers when not possible to use such compaction equipment, as approved by the Engineer. A relative compaction of at least 95% of the Laboratory maximum dry density shall be achieved at optimum moisture content determined in accordance with Test 13 of BS 1377. No backfill shall be executed until the footings, foundations, etc. have been inspected, measured and approved by the Engineer. Compacted layers shall be well rammed and consolidated before the next layer is placed, until the trench is completely filled to the required levels. Power ramming shall be permitted on layers which are 300 mm above the crown of the pipes provided that all the lower layers have been hand rammed to a satisfactory level of compaction and tested in accordance with the requirements of this specification.

2000.12.2 PROTECTION SHEETING AND SHORING

Sheeting and shoring shall be provided at excavations to ensure complete safety against collapse of soil at sides of excavations, to provide protection to workmen and to prevent damage to adjacent property, structures, paving and utilities.

2000.12.2.1 General The earth shoring system shall be either singular or multiple staged, comprised of soldier piles and laggings, sheet pile wall and bracing, raker or timber sheet piling, wall bracing or secant piping bracing and tieback systems. Contractor has the option of selecting a mentioned or combination of several methods to design, and to construct the shoring system as approved by the Engineer. The Contractor shall determine the size of excavation in order to accommodate the proposed methods of support. However the design shall evaluate the effect of excavation size and the proposed support system on the adjacent structures. Adjacent structures are those that are within a distance equal to twice the total depth of the excavation away from the closest edge of excavation. The Contractor shall be responsible to obtain all necessary Municipality approvals before commencing any shoring system.



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indicating all details of the methods he proposes to adopt along with the necessary design calculations and drawings. The Contractor shall comply with the following:- Earth retention systems shall be designed to withstand an additional 0.5m of excavation below the proposed bottom of excavation without design. Shoring shall be designed for stability of excavations through overburden soils and for safety during construction. Support of excavation system, including dewatering procedure shall be designed to contend with groundwater flows. Obtaining and complying with all permits, laws, regulations and codes of the Municipality and all other authorities having jurisdiction. 2000.12.2.2 TIMBER -Timber sheeting and planks shall conform to the following: -Allowable working stress of not less than 84 Kg/cm2. -Nominal thickness not be less than 75 mm (3 inches). A complete structural report to be submitted for Engineers approval prior installing the wood. The timber shall be first time in use. 2000.12.3 WATER Water shall be clean potable water as specified under SECTION 3000 Concrete Work. 2000.12.4 CONCRETE Concrete used as fill for making up to correct levels, of over- excavated shall be where required as instructed by the Engineer, with Grade as specified in CONCRETE WORKS. 2000.12.5 EXCAVATION PERMITS The Contractor shall be responsible for obtaining all permits relating to excavation works and shall bear all costs involved. The Contractor shall abide by all conditions, etc. laid down in such permits. 2000.12.6 UNAUTHORIZED EXCAVATIONS Excavations performed below the elevations shown or specified without the Engineers prior written approval shall, at the Engineers discretion and without additional cost be backfilled with mass concrete of approved strength or with approved structural fill, unless instructed otherwise by the Engineer. 2000.12.7 EXCAVATION IN ROCK Rock shall be defined as boulders, exceeding 0.5 m3 in volume. 2000.12.8 EXCAVATION FOR PAVED AREAS AND KERBS A. Subgrades

Subgrades shall be approved by the Engineer before proceeding with construction of pavements and kerbs.



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1) The top 300mm of subgrade resulting from excavation shall be free unsuitable material and be equal to the following percentages of maximum density at optimum moisture when tested in accordance with ASTM D1557:

- Under paved areas and kerbs: - 95% 2) If the sub grade does not meet the above requirements after proof-rolling, compact the sub grade by rolling with suitable compaction equipment to obtain the density specified. 2000.12.9 VARIATIONS IN DEPTHS OF EXCAVATIONS Should the soil at the design foundation bottom level contain organic matter, the Contractor shall excavate deeper as directed by the Project Manager until non-organic soil is encountered. The additional work involved shall be measured on completion and the additional cost involved shall be adjusted in the final account. 2000.10 EXCAVATION FOR FOUNDATIONS AND SUBSTRUCTURES The levels to which the Contractor shall excavate are shown on the Drawings. Should it be found necessary to reach a more suitable strata, the Contractor shall perform all additional excavation as directed by the Engineer. During excavation for foundations, the bottom layer of excavation of minimum 200 mm in thickness, shall be left undisturbed and subsequently removed manually only when the concrete blinding is about to be placed in order to avoid softening or deterioration of the surfaces of the excavation. 2000.13 STORING OF SUITABLE EXCAVATED MATERIAL During excavation, materials suitable for backfill and fill shall be stockpiled on the Site at sufficient distance from the sides of the excavation to avoid over-loading and prevent any cave-in or mixing with the concrete during the construction of foundations. 2000.14 DISPOSAL OF UNSUITABLE AND SURPLUS EXCAVATED MATERIAL Upon the order of the Engineer, all unsuitable and surplus excavated materials shall be immediately removed, loaded and transported off Site area by the Contractor to dumps located by and approved by the local authorities concerned.

2000.15 COMPACTION Compact each layer of fill with equipment to achieve the following percentages of maximum density at optimum moisture when tested in accordance with ASTM D1557: Location % Max. Density Under Raft Foundations 98 Under Paved Areas and kerbs 95 Under Slabs on Grade 95 General Grading 90 A. Do not compact soil when the moisture content varies more than 3% from the optimum moisture

content. Maintain moisture content by wetting or drying manipulation. Suspend compacting



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operations when satisfactory results cannot be obtained because of rain or other unsatisfactory conditions.

B. In lieu of drying by manipulation, hydrated lime, monohydrated lime or similar beneficial ingredients

may be used to reduce the moisture content, reduce the plasticity index or improve workability. Apply such ingredients in a manner and quantity as recommended by the manufacturer or as required by the Soil Testing Laboratory and approved by the Engineer.

2000.16 BACKFILLING AGAINST FOUNDATION WALLS After completion of foundation walls and removal of forms, clean the excavation of all rubbish and debris before application of waterproofing and placement of backfill. Backfill as here-in-before specified for fill operations. Maintain symmetrical backfill loading and compact each layer by hand tampers or other suitable equipment. The excavated material arising from all excavation or any other imported material as directed shall be used as filling. The filling layers shall not exceed more than 150mm loose depth and compact other than Rock Fill. The excavated material; arising from all excavations declared by the Engineer's Representative to be suitable for fill is to be used as filling all other filling material shall be imported. The imported materials shall be:

a. Sand and or subkha and obtained form an approved source in accordance with the latest instructions issued by the Department of Municipalities regarding the winning of material for filling.

b. Shall contain no perishable or organic rubbish and no protocols in excess of 150mm in diameter.

c. MDD maximum dry density not less than 1600kg/m3. Filling or backfilling shall be placed in layer not exceeding 15cm thickness after compaction, each layer shall be spread and moistened or dried by aeration to ensure the OWC optimum water content and shall be compacted uniformly up to the specified density 98%, the number of the density test per layer shall be as instructed by the Engineers Representative. When machine compacted, compaction shall be by means of a 6 ton smooth wheeled roller. The Engineer's Representative shall have the right to disapprove any compacting device of inadequate capacity or in his opinion, of type unsuited to the character of the material being compacted. Heavy equipment for spreading and compacting fill and backfill shall not be operated closer to walls than a distance to the difference in height between the opt of the footings and the layer being compacted Testing to determine the density of enplane soil shall be by means of ASSHTO Standard Method of Test T147 or in accordance with BS1377: 1975. The number of density tests per layer shall be as instructed by the Engineer's Representative. When backfilling behind the retaining walls or the basement walls, no compaction shall be carried out until the wall concrete has achieved its full strength. Compact fill shall consist of approved materials obtained either from excavations or from other approved sources. Compacted fill shall comprise of suitable granular materials

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