ITEM DESCRIPTION SHS I as A The Employer intends to construct under this Contract Godown building,Ablution block together with associated Civil Engineering works. Buildings have the following plinth areas given for Contractor's ance only. NO OF UNITS PLINTH AREA BUILDING 554 SM BLOCK 21 SM B ISUFFICIENCY OF TENDER The contractor shall be deemed to have satisfied himself before tendering as to the correctness and sufficiency of his tender for the works and of the rates and prices stated in the priced Bills of Quantities which rates and prices shall cover all his obligations under the contract and all matters and things necessary for the proper execution, completion and maintenance of the works. C IINSUR.ANCE The contractor shall insure as required by clause 30 of the conditions of contract in Tender document "A". payment on account for the work executed will be made to the itractor until he has satisfied the Project Manager either by production of an urance Policy or an insurance certificate that the provisions of the urance Clauses have been complied with in all respect and payment for miums made as necessary. The Contractor will be required to furnish a Bond from approved and well reputed Bank in a sum equal to 10% of the Contract sum, using the standard form of Bond provided. Alternatively the Project Manager may at his discretion, accept a security deposit in cash in lieu of the Bond. The deposit is to be of the same amount as the Bond. The Contractor shall not be allowed to commence the works, until he has submitted the performance Bond to the Project Manager duly signed, sealed and stamped from an approved Bank.
Transcript
ITEM
DESCRIPTION
SHS I as
A
The Employer intends to construct under this Contract Godown building,Ablutionblock together with associated Civil Engineering works.
Buildings have the following plinth areas given for Contractor'sance only.
NO OF UNITS PLINTH AREA
BUILDING
554 SM
BLOCK
21 SM
B ISUFFICIENCY OF TENDER
The contractor shall be deemed to have satisfied himself beforetendering as to the correctness and sufficiency of his tender for the worksand of the rates and prices stated in the priced Bills of Quantities whichrates and prices shall cover all his obligations under the contract and allmatters and things necessary for the proper execution, completion andmaintenance of the works.
C IINSUR.ANCE
The contractor shall insure as required by clause 30 of the conditions ofcontract in Tender document "A".
payment on account for the work executed will be made to theitractor until he has satisfied the Project Manager either by production of anurance Policy or an insurance certificate that the provisions of theurance Clauses have been complied with in all respect and payment formiums made as necessary.
The Contractor will be required to furnish a Bond from approved and wellreputed Bank in a sum equal to 10% of the Contract sum, using the standardform of Bond provided.
Alternatively the Project Manager may at his discretion, accept a securitydeposit in cash in lieu of the Bond. The deposit is to be of the same amountas the Bond.
The Contractor shall not be allowed to commence the works,until he has submitted the performance Bond to the Project Manager duly signed,sealed and stamped from an approved Bank.
ITEM I DESCRIPTION I SHS
A INSERTION TO BE MADE IN APPENDIX TO THE CONDITIONS OFCONTRACT
Name of Project Manager
Amount of Surety
Penalty to be levied for latesubmission of work programmeor an updated programme.
Minimum insurance covers- Loss or damages to the works
- Insurance to cover other property(public liability)
- Insurance to cover personalinjury and death (public liability)
- Insurance to cover contractorEmployees
Fluctuation Adjustments
Period for submission of programme
Period of an updated programme
Date for possession of site
Start date
Contract Period
Date for practical completion
Minimum amount of value of workdone and materials on site tojustify a payment certificate
Chief Architect
10% of contract sum
Kshs. 1,000.00 per day
(Contract sum)
Kshs. 5,000,000.00
Kshs.5,000,000.00
As per the Governing Act
Shall not apply in the contract.
Two weeks from start date
One week
To be stated in the letter of acceptance
To be stated in the letter of acceptance
(...... .)Weeks
To be stated in the letter of acceptance
5.00 Million
Percentage of certified value retained 10%
Limit of retention fund
10%
Defects liability period
Six months for building and twelvemonths for civilengineering works
Damages for delay in completion
At the rate of Ksbs.2,000.00 per day
CONTRACTOR
3/U5
ITEM I DESCRIPTION I SHS I crs
The Contractor shall make available on site as and when required by theProject Manager a modern and accurate level together with levelling staff,Ranging rods and one 30 metre metallic measuring tape.
A
B
The Contractor's attention is drawn to the Legal Notice in the Finance Actwhich requires Payment of VAT on all contracts. The Contractor should thereforeinclude an allowance in his rates and prices for VAT and any other Governmenttaxes and levies currently in force.
The tender is advised that in accordance with Government regulationswithholding Taxes of income and VAT will be levied against the total contract sum bythe Employer and remitted to the Commissioner of Domestic Taxes; through all interimand final certificates. It should be noted that this is not an additional Tax; but it isan advance payment of Tax which will be refundable once the Contractor hassubmitted annual returns to the Kenya Revenue Authority who will do the refundswhen satisfied that all the income tax regulations have been compiled with.
The Contractor shall take every precaution to avoid damage to the existingproperty including roads, cables, drains and other services and he will beheld responsible for all damages arising from the execution of thiscontract to the aforementioned and he shall make good any damage whendirected at his own expense to the satisfaction of the Project Manager and the
C
CARRIED TO COLLECTION
3/06
ITEM DESCRIPTION
SHS i as
A
There is already an existing sign board which the contractor is to re-name andin accordance with Drawing No.NHC.1 10/49 in appendix 'B' and maintainthroughout the Contract period.
Signboard comprises a strong well braced frame set in foundations with a" board and separate boards for all consultants, main and Sub-contractors.
whole of the supports and boards must be well painted and the lettering,ich must not exceed 50mm high on the consultants boards, motifs etc.mustcarried out by an experienced sign writer to the approval of the P.M.
ig on the signboard will not be permitted except with the writtenfrom the Project Manager.
Contractor shall be responsible for paying any charges, fees or taxesanded by the Nairobi County in respect of the Signboard installationg the contract period.
The signboard as indicated above shall be re-named within four (2) weeks fromthe date of possession of the site.Apenalty of Kshs. 2,000,00 per day willcharged for late erection of the signboard.
B ISITE OFFICE
There is already an existing structure at the site which is to be finishedin accordance with NHC drawing No.09b in appendix 'B'.The office shall becompleted and ready for use within (3) Three weeks from the date of sitepossession failure to which liquidated damages/penalty of Kshs.5,000.00 per daywill apply for non-completion.The contractor will ensure That the site office shallbe equipped with sufficient furniture to permit the Project Manager to hold site r
in it, and for the Clerk of Works and any other site staff to operate efficiently.Protective clothing shall be provided to the Clerk of Works during the currency ofthe contract and for the Corporations representatives during Site Meetings and
inspections.
e Contractor shall make connections to existing drain and water mains allthe satisfaction of the Project Manager and County Authority.The Contractor shally for all charges for connections, and for electricity and water bills duringnstruction and maintenance period.
The Contractor shall also allow for providing the services of a cleaner forkeeping both office and the closet in a clean and sanitary condition fromcommencement to the completion of the works.
site office shall become the property of the employer at the end of the
PRELIMINARIES
ITEM I DESCRIPTION I 5115 I CTS
A
Contractor shall comply with the regulations of wages (Building and;truction Industry) order and shall be responsible for compliance byContractor employed in the execution of the Contract. If required henotify the Project Manager of the names and address of all such Sub-contractors.
ould a claim be made to the Employer alleging the contractor's default inyment of fair wages to any workman employed on contract and if proofreof satisfactory to the Project Manager is furnished by the Labourpartment, the Architect may, failing payment by the Contractor,y the claim out of any monies due or which may become duethe Contractor under this contract.
The Contractor shall furnish the Project Manager if called upon to do so suchparticulars of the rates of wages, hours and conditions of labour referred toabove as the Architect shall direct.
Contractor shall also be required to comply with all other Governmentregulations and orders in connection with employment of Labour.
B WORKING HOURS
e working hours shall be those generally worked by good employers in theilding and Civil Engineering Trade in Kenya. No work shall be carriednight or on gazetted holidays unless the Project Manager shall direct. No work311 be covered up or shall any correcting be carried out without priorproval of the Project Manager.
Allow for providing all scaffolding, plant, tools and vehicles required for theproper execution of the works except for such items specifically and onlyrequired for the use of nominated sub-contractors as described herein. Notimber used for scaffolding, formwork or temporary works of any kind shallbe used afterwards in the permanent work.
D ICONTRACTOR'S SUPERINTENDENCE/SITE AGENT.
The Contractor shall constantly keep on the works a literate English speakingAgent or Representative competent and experienced in the kind of workinvolved, who shall give his whole time to the superintendence of the works.Such Agent or Representative shall receive on behalf of the Contractor alldirections and instructions from the Project Manager and such directions andinstructions shall be deemed to have been given to the Contractor inaccordance with the conditions of contract.
A. TYPES OF PIPE
The Contractor shall construct the pipeline using the designs of pipe, bed,haunch and surround detailed on the Drawings.
Where the Contractor wishes to use a type of pipe not manufactured in theminimum internal diameter indicated in the Contract, he may substitute the nextlarger diameter manufactured, subject to compliance with the designrequirements,- clearance and -cover. The Contractor- shall not use-pipes -andfittings supplied by more than one manufacturer without approval.
B. SETTING OUT
The Contractor shall set out the underground services to the lines shown on theDrawings. Where the service is required laid to fails these shall be set by meansof proper sight rails and boning rods.
Sight rails shall be of the following minimum standard. They shall be adjustablesight rails of 150mm x 30mm wrought softwood of length im painted black andWhite as directed secured to strong uprights embedded in the ground atdistances not exceeding 60 metres.
Care shall be taken to ensure that these sight rails are not obscured by spoilfrom the excavation.
C. EXCAVATION
The Contractor shall carry out the excavation in accordance with the Drawingsand shall comply with the slopes, levels, depths and heights shown thereon.
Unless otherwise directed top soil shall be striped, laid aside and kept separatefrom other excavated materials for reuse. Road bottoming and surfacingmaterial which is approved as suitable for re-use shall be laid aside and keptseparate from other excavated materials.
Where shown in the Contract or directed top soil shall be striped over the fullwidth of the working area before any other operation is carried out and soildeposited in dumps. On completion of the other operations the soil shall beevenly spread over the stripped surface. -
4192
PLUMBING AND DRAINAGE (CONT'D)
Excavation shall be carried out the dry and both trenches and general areas shall bekept free from water by pumping, provision of temporary drains, sumps and
Excavations shall be taken out to the least dimensions required to accommodate theservice and the working space necessary for its installation subject to the followingrestrictions. All excavations shall be carried so that the soil beneath receives themaximum amount of disturbance.
Unless otherwise directed the overall width of pipe trench excavation from the trenchbottom to a level 300mm above crown of the pipe shall be in accordance with thefollowing table:
Maximum overallTrench width (mm)63070075078088011501200123013201440153016001690212023002490Outside diameter ofPipe plus 1000mm
Battering or stepping of the sides of trenches, if approved, will only be permittedfrom 300mm above the crown of the pipe to the original ground level.
raIJ;1-16LdEI4JL!tLPf4YL.J:IN1FcflV1fl4/93
PLUMBING AND DRAINAGE (CONT'D)
The sides of all channels in every manhole shall be brought up vertically to aheight of not less than the diameter of the drain and shall be benched in goodconcrete from the top of the channels at an angle of 30° to the horizontal andfloated to a smooth hard surface with a coat of 1:1 cement mortar.
In all other respects, manholes shall be constructed in accordance with B.S Codeof Practice 301.
B. RECTANGULAR AND SQUARE MANHOLES
Rectangular and square straight through manholes shall be constructed fromsolid block work, stone work or concrete to comply with the following minimuminternal dimensions (millimetres).
PLUMBING AND DRAINAGE (CONT'D)
Depth below Internal access Size of main Internal chamber Height of Wall
ground of outgoing shaft dimensioins channel dimensions chamber thicknessinvert LX W diameter LX W above
benching
Upto74O - 100to150 610x450 - 150
Upto740 . 200to460 760x760 150
Uptol200 - lOOtolSO 760x760 - 150
160to1200 - 230to460 910x910 - 150
1220to1800 - lOOtoISO 910x910 - 150
1220to1800 - 230to460 1070x910 150
1830to4550 760x760 lOOtoISO 1370x910 1370 230
When branches are connected into the manhole, the length and widthdimensions of the chamber shall be increased as follows:
ibPJt'LnfJ.'I,JeRQJfMd4 J;l.
PLUMBING AND DRAINAGE (CONT'D)
Length
Branch Diameter
100mm 300mm/branch on the side with most branches
150mm 380mm/branch on the side with most branches
230mm and 300mm 460mm/branch on the side with most branches
460mm 610mm branch on the side with most branches
Width
Branch Diameter
100mm to 300mm for each side with branches plus 160mm 460mm of thediameter of the main drain which ever is the greater.
A. PRECAST CONCRETE CIRCULAR MANHOLES
Where specified straight through precast concrete manholes shall bemanufactured and constructed to comply with B.S 556 and the followingdimensional requirements. (Dimensions in millimetres).
When branches are connected into manholes the internal diameter of thechamber shall be increased as necessary, up to a maximum chamberdiameter 1830 mm.
PLUMBING AND DRAINAGE (CONT'D)
B. STEP IRONS AND COVERS
Access shaft to manholes of depths greater than 760mm shall be provided withapproved step irons at suitable intervals.
Every manhole or manhole access shaft shall be fitted with a removable air-tightcast iron cover to adequate size and strength, fixed in a manner which preventssurface water gaining access into the drainage system.
Cast manhole covers and frames shall be manufactured in accordance with therequirements of B.S 497 and shall generally fall into the following categories:
Heavy duty : 1 For Carriage waysMedium Duty : For Footpaths
Light Duty : For domestic premises or otherplaces where they do nothave to carry wheeled traffic.
A. BACK DROP CONNECTIONS
Where the level of the branch drain entering the manhole is higher than can besuitably accommodated by the normal type benching, then the branch drain shallbe connected to the manhole by means of a back drop connection.
Back drop connections shall be made in accordance with the details shown onthe relevant Sub-Contract Drawings and the requirements of B.0 Code ofPractice 301.
B. CHANNELS
Where the branch channel connects to the main channel in the manhole, theinvert of the branch channel shall be a minimum of 38mm higher than the mainchannel.
PLUMBING AND 0R41N495 woRksTRADE PREAMBLE 41100
PLUMBING AND DRAINAGE (CONT'D)
During the test, each branch and joint shall be examined carefully for leaks andany defects revealed shall be made good by the Sub-Contractor and the sectionre-tested.
The Sub-Contractor shall take all necessary precautions to prevent damageoccurring to special valves and fittings during the tests. Any items damaged shallbe repaired or replaced at the Sub-Contractor's expenses.
A. UNDER GROUND DRAINAGE SYSTEM
A site test shall be carried out on all drainage pipes before concrete haunching orsurrounds are applied. These tests shall be carried out preferably from manholeto manhole.
Short branch drains connected to a main drain between manholes shall be testedas one system with the main drain. In long branches, a testing junction shall beinserted next to the junction with the main drain and the branch testedseparately. After the test has been passed, the testing junction shall beeffectively sealed.
All tests on underground drains shall be permitted on cast iron drains at thediscretion and to the approval of the Engineer.
Water tests shall be carried out in accordance with the methods described underB.S Code of Practice 301. Clause 601(b) and (c) and the test pressure shall notbe less than 1,520mm head at the highest point in the pipe section and not morethan 10.360mm head at any point in the section.
The test pressure shall be maintained for a period of one hour during which timethe pipe and joints shall be inspected for sweating and leakage. Any leakdiscovered during the tests shall be made good by the Sub-Contractor and thesection re-tested.
In addition to pressure tests, drain pipe runs shall also be tested for straightnesswhere applicable. This test shall be carried out in accordance with one of thetwo methods described in B.S Code of Practice 301. Clause 601 (e).
Testing of manholes shall be carried out in accordance with the methodsdescribed under B.S Code of Practice 301. Clause 601 f).
4/103
PLUMBING AND DRAINAGE (CONT'D)
A. ABOVE GROUND SOIL WASTE AND VENTILATION PIPE SYSTEM
All soil, waste and ventilating pipe system forming part of the above groundinstallation, shall be given a smoke test to a pressure of 38mm of water gaugeand this pressure shall remain constant for a period of not less than threeminutes.
Water tests on above ground soil, waste and ventilating pipe systems shall notbe permitted.
Pressure tests shall be carried out before any work which is to be concealed isfinally enclosed.
Any defects revealed by the tests shall be made good by the Sub-Contractor andthe test repeated to the approval of the Engineer.
In all other aspects, tests shall comply with the requirement of B.S 5572
SITE TEST - PERFORMANCE
B. GENERALLY
Following satisfactory pressure tests on the pipe work systems, operational testsshall be carried out in accordance with the relevant B.S Code of Practice on thesystems as a whole to establish that special valves, gauges, controls, fittings,equipment and plant are functioning correctly to the satisfaction of the Engineer.
All hot water pipe work shall be insulated with preformed fibre glass sectionallagging to a thickness of 25mm.
Cold water pipe work shall be installed with preformed fibre glass lagging to athickness of 25mm where the pipe runs above a false ceiling or in areas wherethe ambient temperature is higher than normal with the result that pipe"sweating", due to condensation will cause nuisance.
All lagged pipes which run in a visible position after erection shall be given acanvas cover and prepared for painting as follows:
(i) Apply a coating of a suitable filler until the canvas weave disappears andallow to dry.
PLUMBING AND DRAINAGE WORKSTRADE PREAMBLE 41104
PLUMBING AND DRAINAGE (CONT'D)
(ii) Apply two undercoats of an approved paint and finish in suitable glossenamel to colours approved by the Engineer.
All laggings for cold and hot water pipes erected crawl ways, ducts and abovefalse ceiling which, after erection are not visible from the corridors or rooms,shall be covered with a reinforced aluminium foil finish and banded in colours tobe approved by the Engineer.
In all respects, unless otherwise stated, the hot and cold water installation shallbe carried out in accordance with the best methods of modern practice asdescribed in C.P 342 and C.P 310 respectively, to the approval of the Engineer.
The test pressure shall be applied by means of a manually operated test pumpor, in the case of long main or mains or larger diameter, by a power driven testpump which shall not be left unattended. In either case precautions shall betaken to ensure that the required pressure is not exceeded. Pressure gaugesshould be recalibrated before the tests.
The Sub-Contractor shall be deemed to have included in his price for all testpumps, and other equipment required under this Clause of the Specification.
The test pressure shall be one and a half times the maximum working pressureexcept where a pipe is manufactured from a material for which the relevant B.SSpecification designates a maximum test pressure as in the case of cast or spuniron pipes, where the test pressures should not exceed 120, 180 and 240metres/head of Clause B, C, or D pipes.
A. STERILIZATION OF HOT AND COLD WATER SYSTEMS
All under ground water mains and above ground water distribution systems,cisterns, tanks, calorifiers, pumps etc shall be thoroughly sterilized and flushedout after the completion of all tests and before being fully commissioned forhand over.
The sterilization procedures shall be carried out by the Sub-Contractor orspecialist employed by the Sub-Contractor in accordance with the requirementsof B.S Code of Practice 310. Clause 409, to the approval of the Engineer.
/;fll1'1efr'/q J•nlftfd4' 't•J:?
ELECTRICAL MATERIALS AND WORKS
A. REGULATIONS
This specification covers the requirements of lighting and power installations inKenya.
All apparatus and materials supplied for and all work carried out shall complywith Kenya Government Electrical Specifications, GES 1 and 2 local statutoryRegulations and the Supply Authority Bye Laws.
Installations should also be in accordance with the requirements of theEdition of the "Regulations of the Electrical Equipment of Buildings" issued by theInstitute of Electrical Engineers of Great Britain, which should be used as a "Codeof Practice", except where they conflict with Kenya Government Legislationregarding electrical installations and local amendments.
B. STANDARDS
Except where otherwise indicated in this specification, the Contract works and allmanufactures items shall comply with the relevant specifications of the BritishStandards Institution. Such specifications are hereinafter referred to as B.S. Ineach case, the latest editions of such specifications shall apply.
Should it be desired to offer equipment covered by other National orinternational standards, the approval of the Engineer must be obtained in writingbefore completion of the tender documents.
C. RECORD DRAWINGS
The sub-contractor shall mark accurately on one set of drawings the conduit laidduring the progress of the work. This information must be made available onsite for inspection by Engineer.
At the completion of the Contract. The contractor shall supply the Engineer withone set of transparent originals and two complete sets of prints showing thecomplete installation. The drawings shall included the location of all apparatusconduits and cable routes, and a schematic diagram of mains distributionindicating the phasing of the system.
ELECTRICAL IN5T,4LLA 77GMTRADE PREAMBLES 41106
ELECTRICAL MATERIALS AND WORKS (CONT'D)
A. CONTRACT DRAWINGS
These drawings forming part of this specification are to be read in conjunctionwith this specification to enable the Contractor to prepare a tender.
These drawings are not intended to be used as working drawings unless they arereleased for that purpose.
Circular or square boxes shall be provided at all outlet points, unless otherwisespecified and lighting fittings, ceiling switched and other accessories will bescrewed to the internal lugs of the boxes. Care must always be taken whenconsidering the use of totally enclosed fitting with polyvinyl chloride circularboxes where the temperature within the box is likely to rise above 60 C(140 F)special-steel insert clip should be used in conjunction with circular boxes wherethis problem can arise and also in situations where heavy pendants are used.
Looping in boxes of circular polyvinyl chloride pattern to sheet 63 B.S. 4607 part2 may be used in such work as dictated by the structure of the buildings.Conduit entry shall be made by means polyvinyl chloride socket adaptors andpolyvinyl chloride bushes.
Adaptable boxes shall be of moulded of fabricated polyvinyl chloride of square oroblong long shape complete with polyvinyl chloride lids secured by 2 BA brass orsteel plated round headed screws. All adaptable boxes and lids for the same sizeshall be interchangeable. No adaptable box smaller than 75mmx5Omm or largerthan 300mm x 300mm shall be employed. Boxes shall be of adequate depth inrelations to the size of the conduit entering them.
Conduits shall be terminated at adaptable boxes, fuse boards, switches, socketsor other equipment not possessing push-in or threaded spouts; by means ofappropriate size female adaptor and polyvinyl chloride Hexagonal headed BareBush. All cemented joints to be made to a depth of not less than the diameter ofthe conduit being used.
Earth continuity shall be provided by a separate insulated conductor drawn intothe plastic conduit and related in accordance with circuit loadings andappropriate regulations, or as mentioned on the drawings.
Where required under the regulations, an earth continuity conductor shall beprovided for lighting fittings in which case the control switches shall be equippedwith an appropriate earth terminal.
ELECTRJC4L INSTALL nON1Th405 PREAMBLES 41107
A. ARRANGEMENT OF CONDUIT LAYOUT
The conduit system shall be carefully planned and erected to avoid allunnecessary bends or changes in directions. Conduits shall be laid in straighthorizontal or vertical lines with easy sets. Where several conduits follow similarroutes, they shall be neatly grouped in multiple runs. Where multiple runschange direction, the radii of the sets shall be laid out from a common centre.Where draw-in boxes for right angled change of direction are required in multipleruns, adaptable boxes shall be used for such sizes as to allow all conduits toenter the box without sets.
The cables shall be coloured in accordance with Table B4 of Institute of ElectricalEngineer Regulations. Cables used on extra low voltage circuits shall havedistinctive colours other than these colours.
No reduction of the strands forming the conductors shall be allowed at switch orother terminals, but all strands shall be effectively secured by screws, nuts andwashers or other approved means.
CEILING
B. TYPE
Ceiling roses, ivory or white, shall be of the 3-plate pattern and fitted at allpendant points. An earthing terminal shall be provided and connected to theearth continuity conductor of the final sub-circuit where applicable.
Ceiling roses of the white porcelain semi-recessed pattern shall be used forsurface installation, and shall be of the all-insulated type for a flush installation.
LAM PHOLDERS
C. TYPE
Lamp holders shall generally be of plastic construction with porcelain interiors,and bayonet fitting.
Lamp holders for lamps rated 200 watts and above shall be of Edison Screwtype.
Batten type lamp holders shall be of the all-insulated bayonet type.
ELECTRICAL INSTALLATIONlEAVE PREAMBLES
4/108
LIGHTING FITTINGS
A. GENERAL
The Contractor shall supply and fit all lighting fittings of the type indicated on thedrawings and in the schedules. All fittings shall be suitable for operation on a240 V. 50 cycles supply. Lighting fittings rated other than 240 volts will not besupplied with lamps.
B. FLUORESCENT FITTINGS
Fluorescent fittings shall generally be of the batten type, with control gearcontained within the supporting channel. All fittings shall be supported formconduits boxes, and shall be suspended by two 20mm conduits to give aclearance of 25mm between the top the fitting and the ceiling. In the ceiling,the conduit boxes, to B.S. 31, shall be fitted with dome covers, to which thesuspension conduit shall be joined, so that the lighting fitting hangs verticallybelow the conduit boxes. Fittings shall comply with B.S. 3820 or class 1, indoornormal atmosphere.
All fluorescent fittings shall be fitted with radio interference suppressioncapacitors and power factor correction capacitors and shall be earthed.
C. LAMPS
All fittings shall be supplied complete with lamps of the type and rating specified.Fluorescent tubes shall be of the "White" type, except where otherwise stated.Pearly type tungsten lamps shall be fitted in open fittings.
FLEXIBLE CORDS
D. TYPE
These shall be of 250 volt grade polyvinyl chloride insulated and shall complywith B.S. 7 Flexible cords shall not be less than 241. 20 (231.0076). Flexible cordsfor pendant fittings shall be circular type, heat resistant and white in colour.
4/109
ELECTRICAL MATERIALS AND WORKS (CONT'D)
A. EARTHING
Earth electrodes shall be minimum 2 metres long by 15mm diameter hard drawncopper rod, and shall be located not less than 3 metres apart at a convenientposition 6 metres away from the building. The terminal head of each electrodeshall be in a concrete inspection pit, with cover. If the resistance to earth is notsatisfactory with the electrode, then additional electrodes or an earth mat shallbe provided, as directed by the Engineer.
B. DISTRIBUTION SYSTEM EARTHING
All distribution boards shall be earthed in accordance with the institute ofElectrical Engineer regulations. All metal work associated with the installationshall be earthed to comply with the regulations currently in force.
C. TESTING OF EARTHNG SYSTEM
The resistance of continuity system, when measured between the main earthingpoint and any other point in the installation, including all conduit and other metalwork which may provide a path or earth, shall not exceed 0.5 ohm where steelconduit forms part or the whole of the systems, or 1.0 ohm, if the earthcontinuity system is composed entirely of copper, copper alloy aluminium.
When the installation is complete, the sub-contractor shall carry out tests forearth loop impendence, polarity, insulation resistance, in the presence of, and tothe satisfaction of the Engineer and the Kenya Power & Lighting Company. TheContractor shall rectify all work not giving test results within the limitsprescribed.
Four copies of all test results shall be forwarded to the Engineer and a Certificateof completion will not be issued until such tests have been approved.
ELECTPJC4L INSTALLATIONTRADE PREAMBLE
41110
RATE
SHS
A 25 x 25 x 15mm Tee. NO
7
B 20 x 15 x 15mm Tee. NO
2
C 32 X 25 mm Reducing bush
NO
2
D 32XlSmmDitto NO
2
E 25X2OmmDitto NO
2
F ZOXlSmmDitto NO
4
G 32 X 32 mm Female adapter NO
2
H 25X2SmmDitto NO
2
3 15 X 15 mm Male adapter NO
16
NO 1 4
NO 2
K 32mm Diameter low pressure Peglar screw down crutchhead stop cork with coupling and two red lead joints
L 32mm non return valve
Connections
M 32mm Diameter straight connections to heavygauge plastic header tank with two back nuts andrubber washer including perforation to the tank
N 15mm Diameter flexible connections to sanitaryfittings in lengths of chromium plated flexible tubing
English make and backnuts and rubber washers.
Sterilization
p Allow for sterilization of the internal plumbing system
NO 1 2
NO I 7
ITEM
ITEMQ Allow for testing the whole of internal plumbing workswhile in progress and on completion to the satisfactionof the Project Manager and Authorities
Kshs.
PLUMBING AND DRAINAGE INSTALLATION
ITEM DESCRIPTION UNIT QTY RATE SHS CTS
INTERNAL DRAINAGE
Heavy Duty UPVC soil, waste and vent Dines andfittings as "Key Terrain" to B5. 5452 with solventwelded joints fixed strictl y in accordancewith manufacturer instructions
A 32mm Diameter grey pipe in wall chase or floor LM 52
B 40mm Ditto LM 148
C 50mm Ditto LM 3
D 100mm Ditto LM 12
E 100mm Diameter golden brown pipe LM 18
Extra over pine for:-
F 32mm Diameter bend NO 8
G 50mm Ditto NO 6
H 100mm Ditto NO 14
3 50mm Diameter Sweep tee NO 2
K 50mm Diameter equal tee NO 4
L 40mm Ditto NO 4
M bOx 75mm Diameter Reducer NO 1
N 50 40mm Ditto NO 2
P 50 x 32mm Ditto NO 2
Q 40 x 32mm Ditto NO 4
R 40mm end cap NO 2
S 50mm Ditto NO 1
CARRIED TO COLLECTION Kshs,
PLUMBING AND DRAINAGE INSTALLATION
8/03
RATE
A White vitreous china low level W.C. suite comprising NOof closet as "Twyfords Classic NO. 11032 WH8" "P' or "Strap 7.5 litres ceramics cistern NO. 12530 WHI with valveless
fitting and plastic syphon, plastic flush bend, heavy dutyplastic seat and cover; pan plugged and screwed toconcrete floor and bedded inmastic and cistern fixedto walls
Water closet accessories
White vitreous china built in toilet roll holder as NO"Twyfords Ref NO. 16452 WHO" size 305 x 150mmincluding pointing in cement mortar
15mm Diameter flexible connections to sanitary NOfittings with backnuts, rubber washers and chrome platedangle valve
Nhite vitreous china wash hand basin as "Twyfords NO 6loctune NO.14002 WHI" size 500 x 430mm completewith lNo.12mm Aztec tap NO.54100 CP5:32mmwaste NO. 54330 CP1 plug ,chain and stay;fixing)rackets NO.56307 GV2 and all necessary
32mm Diameter heavy duty plastic bottle trap as NO"Caradon Terrain LTD Ref. NO. 631.125" complete withheavy duty sink waste outlet
15mm Diameter flexible connections to sanitary fittings with NObacknuts,rubber washers and chrome plated angle valve
G 1
610 x 457 x 6mm Thick Glass plate mirror fixed to NOwall with 4No.chrome plated dome capped screws completewith foam back-rest
CARRIED TO COLLECTION I I I Kshs.
ITEM DESCRIPTION UNIT QTY RATE SHS CTS
Urinal TroughA Stainless steel urinal trough without division,3000mm long,
1195mm high complete with 200x100mm channel,Ylitres vitreous china automatic cistern with drip tap andwall mounted hangers,heavy duty plastic connectors,65mmdiameter BSP inlet and heavy duty plastic urinal "P' trap. NO
Urinal Trough AccessoriesB 65mm diameter chrome plated waste grating NO
C 15mm diameter stainless steel flash pipe fixed on wall. NO
D Ditto spreader with 4no end cap (3meters long) NO
E Allow for special cutting and welding to the stainless steel ITEMurinal trough to form bend or conner to Project Manager'sapproval.
Hand drierF Automatic hand drier in white, operating on an infrared
automatic sensing system with safety cut-out complete withplastic rawl plugs and fixing screws. It is to have a heatingcapacity of 2.1kw and performance flowrate of 135dm
(3.82m3/min) and to be of size 270x264x143mm deep. To NO 2
be as "Wandsworth Bunnie, model HDZ" or equal and
approved
Soap dispenserG 0.4litre liquid soap dispenser complete with initial supply
of soap gel, with wall mounting brackets and keys. To be as"Zalpon" or equal and approved. NO 2
CARRIED TO COLLECTION Kshs.
COLLECTIONBrought forward from page 8/01
Brought forward from page 8/02
Brought forward from page 8/03
Brought forward from page 8/04
Brought forward from page 8/05
Brought forward from above
TOTAL OF ELEMENT NO. 1 - INTERNAL PLUMBINGAND DRAINAGE CARRIED TO SUMMARY Kshs
PLUMBING AND DRAINAGE INSTALLATION
8/06
ITEM DESCRIPTION UNIT QTY RATE SHS CTS
FIRE FIGHTING
Fire fighting equi pment and fitting as specified anddescribed in the specifications complete with allfittinqs,accessories and the necessary to thesatisfaction of the Project Manager.
HOSEREEL SYSTEMWhere necessary allow for fixing clips,holderbats plugged and screwed.Medium g rade (Class C) galvanized mildsteel pipe in:-
A 32mm Diameter pipe LM 100
6 25mm Diameter pipe LM 35
Extra over pi pework for:-
C 32mm Diameter elbow NO 15
0 25mm Ditto NO 6
E 32mm Diameter equal Tee NO 3
F 32x32x25mm Diameter Tee NO 1
6 32mm Diameter Unions NO 3
I-I 32 x 25mm Reducers NO 2
Valves
J 32mm Diameter gate valves as "Peglar" NO 3
K 25mm ditto NO 2
L 32mm Diameter unions NO 2
M 25mm ditto NO 2
N 32mm Diameter non return valve NO 2
CARRIED TO COLLECTIONKshs.
:Jaas
DESC SHS
A Supply and install hosereel hobby pump-set one duty(electric) the other stand by (diesel powered), each of duty 33 lit/sec (10.8M 3 /hr) against 12m total head. The pumps tobe interconnected with automatic control of on/off operation,pressure switch, and are to be mounted on anti vibrationmountings on common frame. Manual switching mechanism Setto be incorporated. It shall have protective metal housing.Pump to be as "Grundfos" or equal and approved.
B Excavate trench not exceeding 1500mm deep LM 10and average 600mm from natural ground level,75mm thick sand bed including backfilling afterlaying the cables. (m.$)
C Supply and install 2C x 4.0mm2 PVC SWA PVC LM 10cable laid 600mm on 100mm sand bed coveredwith another layer of 100mm
D IDitto 2C x 2.5mm 2 flexible cable. I LM 1 10
E Allow Testing, Commissioning and Handing over ITEMthe entire electrical installations to the satisfactionof the Project Manager.
COLLECTION
forward from page 8/07
forward from page 8/08
Brought Forward from above
8/09
ITEM DESCRIPTION UNIT QTY RATE SHS cl-s
THE FOLLOWING IN 5,000 LURES HIGHLEVEL CYLINDRICAL STORAGE WATER TANK
Supply, delivery and installation of the followingas specified and described in the specificationscomplete with all fittings, accessories and thenecessary su pports, all to the satisfaction of theProject Manager.
STORAGE TANK
A 5,000 Litres capacity cylindrical high level water NOstorage tank size 1870x1830mm high as "ROTO"
or equal and approved,complete with 2noperforations, necessary back nuts and overflow.The tank to come complete with tank cover.
Tank accessories
B 32mm Diameter high pressure ball valve NOas "Peglar" with plastic float and brass stemand connecting to tank with union and backnuts.
C Float switch regulator NO
0 Mechanical Water level indicator gauge board NOcomplete with float and cube
STEEL TOWER, PLATFORM AND LADDER
E 6 meters high,water tank tower made and NOfabricated from sectional steel capable ofsupporting 5000 litres cylindrical plastic tankabove.To be complete with tank support base,ladder and guard rails.Submit detailed design forthe tower and concrete base to the structuralengineer for approval
CARRIED TO COLLECTIONKshs.
OJ LU
M 18mm Diameter high tensil bars
C.s,n fnrmwnrlr tn-
KG I 1200
N I Sides tower bases SM I 256
SHSITEM
DESCRIPTION
STEEL TOWER BASES
Excavation and earthworks
A Excavate pit for tower bases not exceeding1.50 metres deep commencing from ground level.
B Ditto 1.50 - 3.00 metres deep
C Extra over fro excavating in rock class 3in any position
D Ditto in rock class 1
E Level and compact bottom of excavated pit
F Backfill selected excavated material around tank
G Load and cart away surplus excavated materialsfrom site
H Allow for keeping excavations free fromgeneral water
J Allow for upholding sides of excavations
CM I 4
CM 1 96
CM 125
CM
85
SM
96
CM
50
CM I 50
ITEM
ITEM
K 50mm thick blinding under strip foundation SM I 4
Vibrated reinforced concrete (1:2:4) asas described in:-
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