Civil and Building Works Specifications

8/13/2019 Civil and Building Works Specifications

1/92

SPECIFICATION

CIVIL WORKS

SPECIFICATION

CIVIL WORKS

INDEX

1


2/92

SPECIFICATION

Clause

No.

Title Page No.

1. SCOPE OF WORKS 81.1 General 81.2 Tender Proposals 91.3 Tender Conditions, Drawings, Schedule of ates 91.! Ci"il Su#$contractors 91.% &ethod State'ent 1(1.) *ssistance to C+-T 1(1./ ecords 1(1.8 &aterials, Sa'ples, Testing, nspection 1(1.9 Purchase fro' an0 Source 11

2 DESCRIPTION OF THE WORKS 112.1 General 112.2 Site Sur"e0 and Su# Soil n"estigation 122.3 Site Preparation 122.! Te'porar0 *ccess 132.% Ser"ices 132.) oundar0 all and Gates 132./ oadwa0s, Pa"ings and Surfacings 132.8 Drainage and Septic Tans 132.9 4oundations 1!

2.1( -5ternal 4loodlighting and -'ergenc0 +ighting 1%2.11 uildings 1%2.12 Ca#le Trenches 1)2.13 *ppro"al of &aterials 1/

3. DESIGN OF WORKS 1/3.1 Design and Drawings 1/

3.2 +ia#ilit0 1/3.3 Standards and Codes of Practice 1/3.! Su#'ission of Designs and Drawings 183.% e"iew #0 the C+-T 193.) Detail e6uire'ents for Su#'ittals 193./ 4ire Criteria 2(3.8 Seis'ic +oads 213.9 oad +oads 21

3.1( Drainage 213.11 4oundations 22

! SUSOIL INVESTIGATION 22

% SETTING OUT AND TOLERANCES 23

) EXCAVATION AND EARTHWORKS 23).1 acfill 23).2 -5ca"ations Generall0 23).3 -5ca"ated &aterials 2!

ClauseNo.

Title Page No.

).! otto' la0er of -5ca"ations 2!).% Clienttering 2!).) 4illing and einstate'ent 2!)./ Slips and Settle'ents 2%

2


3/92

SPECIFICATION

).8 -5plosi"es 2%).9 Co'pacted 4ill *reas 2%

/ PILING 2%/.1 Standards 2)/.2 General e6uire'ents 2)/.3 Proprietar0 Piling S0ste's 2)

8 ROADS AND OTHER SURFACES 2)8.1 General 2)8.2 &aterials 2)8.3 Drains, Sewers and Ca#le Ducts 2/8.! Preparation of 4or'ation for site surfacing and internal roads 2/8.% Su#$#ase 2/8.) nterloc Pa"ing locs 2/8./ Cross fall 2/8.8 7p$stand er#s and ecessed er#s 288.9 4ootpaths and Trench Co"ers 28

8.1( Stone Surfacing 28

9 CONCRETE 289.1 Codes of Practice 289.2 Ce'ent 28

9.2.1 Ce'ent 289.2.2 Ce'ent Test Certificate 299.2.3 Ce'ent Sa'ples 299.2.! Ce'ent Storage 299.3 *ggregates 299.! ater 319.% einforce'ent 32

9.%.1 einforce'ent 329.%.2 Steel 4a#ric einforce'ent 33

9.%.3 T0ing ires 339.) Plant 33

9./.1 Concrete Strength e6uire'ents 339./.2 Concreting in hot weather 3!9./.3 Concrete &i5ing 3%9./.! ora#ilit0 3%9./.% Transport and Placing 3%9./.) Co'paction of Concrete 3)9././ i#rators 3)9./.8 Construction :oints 3/9./.9 Construction a0s 3/

9./.1( Curing 38

9./.11 Trial &i5es 38

Clause

No.

Title Page No.

9./.12 ors Test Cu#es !(9./.13 Changes in &aterials or &i5 Proportions !19./.1! 4ailure of Concrete to &eet Test e6uire'ents !19./.1% Concrete Cores !19.8.1 4or'wor !29.8.2 e'o"al of 4or'wor !2

3


4/92

SPECIFICATION

9.9 Tolerance !39.1( P!e"#astconcrete sla#s ; 'e'#ers !!9.11 eplace'ent of da'aged concrete !%9.12 4inish of concrete !%9.13 4i5ings ; Ca"ities !%9.1! linding !)9.1% +oading of Concrete &e'#ers !)

1( WATERPROOFING$ !)1(.1 Generals !)1(.2 Su#'ittals !/1(.3 &aterials !/

1(.3.1 oofing &e'#rane !/1(.3.2 Separation +a0er !/1(.3.3 nsulation oard !/1(.3.! Pri'er !/1(.3.% ainwater


5/92

SPECIFICATION

13 FINISHES %%13.1 Plastering %%

13.1.1 General %%13.1.2 &aterial ; Storage %%13.1.3 Proportions %)

13.1.3.1 7ndercoat %)13.1.3.2 4inishing Coat %)

13.1.! &i5ing %/13.1.% *pplication %/13.1.) Plastering on loc wors %813.2 endering %8

13.2.1 &aterials %813.2.2 Proportions ; &i5ing %813.2.3 *pplication of first coat %913.2.! ertical ; ceilings %913.3 Special wall finishes %9

13.3.1 all Tiling $ &aterials %913.3.2 all Tiling $ Preparator0 or ; 4i5ing %913.3.3 all Tiling = Protection %9

13.! 4loor 4inishes %913.!.1 General )(13.!.2 Screeded ed )(13.!.3 Da'p Proof &e'#ranes 7nder Grade Sla# )(13.!.! Protection )(13.!.% Defects )(13.!.) Terra>>o 4loors )(13.!./ PC flooring )113.!.8 Cera'ic 4loor Tiles )113.!.9 *lali?*cid esistant 4loor Tiles )1

13.!.1( -po50 esin &ortar Screed )213.!.11 Surface Sealant )2

13.!.12 Sirting )2

1!. STRUCTURAL STEEL WORKS )21!.1 General )21!.2 Painting Steel ors )!1!.3 Painting olts )!

Clause

No.

Title Page No.

1% SUSPENDED CEILING )%

1) CARPENTR% AND &OINER% )%1).1 Ti'#er )%1).2 Preser"ati"e )%1).3 or'anship ))1).! 4aults ))1).% uilders ron'onger0 ))

1/ GLA'ING ))

1/.1 General ))1/.2 Clear Glass ))1/.3 ired Glass ))1/.! Tinted Glass )/

%


6/92

SPECIFICATION

18 (ETAL WORKS )/18.1 Co"ers to floor trenches?openings )818.2 olts, uts ; ashers )818.3 &ild Steel Screen )818.! itchenette?Toilet )918.% nsulated 4ire elated &etals Door )919 LOCKWORK FOR OUNDAR% WALL )9

2( INTERLOCK PAVING LOCKS )9

21 PLU(ING /(21.1 -5tent of or and General /(21.2 Pipes and 4itting &aterials $ nternal /1

21.2.1 Cold ater Ser"ices /121.2.2 @ot ; Cold ater Ser"ices /121.2.3 Sanitar0 Plu'#ing ; Drainage /121.2.! ainwater S0ste's /221.3 Pipes and 4itting &aterials -5ternal /2

21.3.1 7nderground Drainage /2

21.! Pipe wors and *ccessories /221.!.1 nstallations /221.!.2 Traps /221.!.3 Connections to Sanitar0 ware and *ppliances /221.!.! Taps and 4ittings /221.!.% nsulators /221.!.) al"es and Cocs /321.% ainwater Pipes and *ccessories /321.) Sanitar0 4ittings, &aterials and -6uip'ent /3

21.).1 General /321.).2 Aualit0 and Colour /321.).3 ater Closets B*siatic /!

21.).! ater Closets B-uropean /!21.).% 4lushing Cisterns /!21.).) 7rinals /!21.)./ Taps and 4ittings /%

ClauseNo.

Title Page No.

21.).8 Sundr0 4ittings /%21.).9 4loor Drains /%

21.).1( aste ater Gull0 Traps /%21.).11 ater Storage @eaters /%21.).12 ater Storage Tans /)21.).13 Transfer Pu'p Set //

21./ uilders or /821.8 Testing /821.9 Cleaning /8

21.1( Disinfections /9

22 LIGHTING AND S(ALL POWER /922.1 Scope /922.2 General Standards /9

22.3 Defects +ia#ilit0 Period /922.! *ppro"als 8(22.% +ighting e6uire'ents 8(22.) Distri#ution oards 81

)


7/92

SPECIFICATION

22./ &iniature Circuit reaers 8222.8 Ca#les 8222.9 Ca#le Ter'inations 83

22.1( Conduit 8322.11 Ca#le Truning 8822.12 Ca#le Tra0s 8822.13 Ca#le :ointing 8922.1! Conductors 89

22.1% Switches and Push#uttons 8922.1) +ighting 4ittings 9(22.1/ +a'ps 9122.18 Socet


8/92

SPECIFICATION

CIVIL AND UILDING WORKS

1. SCOPE OF WORKS

1.1 Ge)e!al

7nder this Section of the Contract the Contractor will #e responsi#le for thedesign and construction of all ci"il engineering and #uilding wors and ser"ices.

The Tender 'ust co"er all re6uire'ents of the tender docu'ents and an0 otherite's not specificall0 'entioned #ut which are necessar0 for the satisfactor0design, construction, operation and 'aintenance of all e6uip'ent to thesatisfaction of C+-T. o additional costs will #e considered for an0 ite'swhich ha"e #een o"erlooed #ut which are essential for the proper co'pletion ofthe proect in e"er0 respect.

The wor shall include #ut not #e li'ited toE

aa

Site sur"e0 and su#soil in"estigation.

#

c

c

NOC*s a)+ )e#essa!, a--!oals /!o0 all se!i#e aut1o!ities a)+ lo#alaut1o!ities to #o0-lete t1e 2o!3.Clie)tte!i)g4 Site -!e-a!atio)4 #utti)g o! /illi)g a)+ leelli)g4 E5#aatio)

a)+ 6a#3/illi)g.

d A##ess !oa+s to -u0- 1ouse as -e! lo#al aut1o!it, !e7ui!e0e)t4 I)te!)altile+ oadwa0s, hard standing, 4ootpaths and site surfacing.

ed

4oundations and su#structure waterproofing.

fe

Pu'p house and associated #uildings.

g

f.

ater suppl0 and plu'#ing installations.

hg

Surface water and foul drainage.

ih

Trenches and ducts.

*ir$conditioning and "entilation.

8


9/92

SPECIFICATION

.

+ighting, s'all power, e5ternal floodlighting, e'ergenc0 lighting and fireprotection.

l

etaining wall.

'l.

Co0-ou)+ 2all 2it1 gates.

n Fuel ta)3s4 #oe!e+ -a!3i)g,

o 4or all #uildings and roo's suita#le na'eplates, signs and la#els shall #epro"ided to ensure identification, #oth in *ra#ic and -nglish, appro"ed #0C+-T. The inscriptions shall #e engra"ed with coloured lettering. *ll thena'eplates, signs and la#els shall #e non$deteriorating and non$warping underaggressi"e weather conditions and shall #e securel0 attached using #olts and nutsor screwsF adhesi"e will not #e per'itted.-8

No)"+ist!u-tie !oa+ #!ossi)g

1.2 Te)+e! -!o-osals

The Contractor shall su#'it with his tender his proposals for all the a#o"e ite's,which shall confor' generall0 to the following section Description of theorsH. Should the Contractor fail to do so then C+-T will ha"e theauthorit0 to reect an0 unaccepta#le later proposals.

1.3 Te)+e! Co)+itio)s4 D!a2i)gs4 S#1e+ule o/ Rates

The General Conditions, Tender Drawings and Schedule of ates shall #e read inconunction with this Specification. &atters descri#ed in one are not necessaril0repeated in the others.

The Tender drawings show general la0outs, architectural features and facilities to#e pro"ided. The drawings indicate the scope of the wors and tenders 'ustco'pl0 with this, 'ini'u' re6uire'ent, howe"er roo' si>es o! ot1e! /a#ilities'a0 #e increased if re6uired to suit design and practical criteria, e6uip'ent andfittings #eing offered as -e!lo#al aut1o!it, !egulatio)s?!e7ui!e0e)t.

The Tenderer shall "isit the site in co$ordination with C+-T and consider inhis offer for cutting, filling or an0 other ground wor re6uired for 'aintainingappropriate finished ground? surfacing le"els in relation to the near#0roads?#uildings and as per Du#ai &unicipalit0Is regulations regarding le"els.

1.! Ciil Su6"Co)t!a#to!

The Contractor 'a0 e'plo0 a Ci"il Su#$Contractor or use a co'petentspeciali>ed section of his own organi>ation to carr0 out the Ci"il wors. TheSu#$Contractor proposed #0 the Contractor shall #e su#ect to the appro"al ofC+-T.

9


10/92

SPECIFICATION

f the Contractor intends to su#$contract the ci"il engineering and #uilding worsdesign and?or construction, his tender 'ust include full details of co'para#lewors carried out elsewhere #0 the su#$contractor, together with details of thefinancial sta#ilit0 and general efficienc0 of the su#$contractor proposed.

The Contractor shall su#'it details of all e0 personnel to #e e'plo0ed on theProect including positions held and curriculu' "itae.

1.% (et1o+ State0e)t

*t the co''ence'ent of the Contract the Contractor shall pro"ide a detailed 'ethodstate'ent. This shall include a progra''e gi"ing full details of #oth t0pe and 6uantit0of all the plant he proposes to use and the order of carr0ing out the wor.

1.) Assista)#e to CLIENT

The Contractor shall pro"ide and 'aintain upon the site to #e a"aila#le for use #0C+-T, sa/et, e7ui-0e)ts i)#lu+i)g PPE /o! su-e!iso!, sta//4 all sur"e0ing

instru'ents and testing e6uip'ent re6uired for setting out and 'easuring the wors andfor controlling and testing the 6ualit0 of 'aterials and wor'anship.

1./ Re#o!+s

The Contractor shall eep at the site accurate and up to date records anddrawings of the wors, and shall pro"ide C+-T with copies of these records/ile+ as -e! t1e ISO 9::;


11/92

SPECIFICATION

here 'aterials or wor'anship are reected #0 C+-T the0 'ust #ei''ediatel0 re'o"ed fro' the site or de'olished and re'o"ed at theContractorIs sole cost.

1.9 Pu!#1ase /!o0 a), sou!#e

The Contractor shall allow in his price for the purchase of all 'aterials etc. fro'an0 source liste+ i) t1e s#1e+ule o/ #o0-o)e)t4 as 'a0 #e necessar0 to'aintain the progress of the ors, su6=e#tto the appro"al of C+-T.

2. DESCRIPTION OF THE WORKS

2.1 Ge)e!al

This section descri#es in greater detail the scope of the ci"il and #uilding worsand sets out an0 special features, which are to #e incorporated into theContractorIs design.

The re6uire'ents for 6ualit0 of 'aterials and wor'anship are to #e found laterin this Section of this Specification.

The design shall generall0 co'pl0 with S codes and lo#al aut1o!it,!e7ui!e0e)ts o! an0 others, which 'a0 #e rele"ant. Si'ilarl0, all 'aterials,construction and tests shall co'pl0 with applica#le codes and standards. Lateste!sio) o/ all S #o+es o! ot1e! sta)+a!+s4 s-e#i/ie+ s1all 6e /ollo2e+.

Due attention shall #e paid in the design to all aspects including internal ande5ternal appearance, ther'al and acoustic insulation, dura#ilit0 of 'aterials,resistance to 'oisture, structural sta#ilit0, fire resistance allied to 'eans ofescape in case of fire, "entilation and pu#lic health re6uire'ents.The Specification Drawings show the preferred la0out arrange'ents of plant and

#uildings and these shall not #e changed without the written appro"al of theC+-T. The arrange'ents shown on the Specification Drawings ha"e #een

#ased on t0pical si>es of plant and e6uip'ent.

The #uildings and roads within the Site and their design and detailing shallco'pl0 with a)+satisf0 the funda'ental technical and operational re6uire'entsof plant to #e acco''odated therein and with the re6uire'ents of thisspecification. oo' si>es shall not #e s'aller than shown on the SpecificationDrawings #ut 'a0 #e larger if necessar0 to 'eet the re6uire'ents of the plantactuall0 #eing supplied and identified in the technical schedules.

The Contractor should ascertain for hi'self during the tender stage that the planthe proposes to suppl0 will #e suita#le for the arrange'ents shown onSpecification Drawings, and the Contract Price is dee'ed to include the cost ofan0 enlarged #uildings or 'odified la0out to 'eet the design para'eters. 4ailureof C+-T to co''ent on drawings su#'itted #0 the Contractor during thetender stage which show 'odified arrange'ents not co'pl0ing withSpecification Drawings and design para'eters shall not #e accepted as appro"ing

11


12/92

SPECIFICATION

such arrange'entsF an0 'odifications proposed should #e clearl0 stated in theschedule of De"iations.

Particular attention should #e gi"en to the positioning of doors, windows andlou"ers to 'ini'i>e the effects of sandstor's and salt laden spra0 and windsfro' the sea. Cladding, flashing and the lie shall #e as tightl0 fitting as

practica#le so as to e5clude pollution under all liel0 local weather conditions.*ll e5ternal doors shall ha"e canop0?protection and #e sealed to pre"ent ingressof dust and wind #lown rainwater, using hea"0$dut0 seals, which shall ha"ecanop0?protection and #e guaranteed for a 'ini'u' period of fi"e 0ears fro'date of co''issioning. The doors and seals shall #e designed so thatreplace'ent of worn seals can #e achie"ed easil0 on site.

2.2 Site Sur"e0 and Su#soil n"estigation

The Contractor shall carr0 out the su#$soil in"estigations and in$site orla#orator0 tests re6uired to co'pletel0 satisf0 the design para'eters he choosesfor foundation or other geo$technical design. The in"estigation and su#se6uenttests shall #e in accordance with S.%93( and S.13// respecti"el0.

Sa'ples shall #e taen as necessar0 and tested to deter'ine the ph0sical andche'ical characteristics of the "arious strata and of the ground water, ifencountered. ecords of #oring and trial e5ca"ations and results of tests onsa'ples shall #e incorporated into a su#$soil in"estigation report. This shallinclude reco''endations on the t0pe of foundation and on the design #earingcapacit0 of the su#$soil and shall #e su#'itted to C+-T for appro"al. TheContractor shall sur"e0 the site of the wors to esta#lish precisel0 the site

#oundaries and ground le"els o"er the whole area. The site sur"e0 plan shall #eprepared showing the sur"e0 results and the proposed la0out of new wors.Copies of this plan shall #e sent to C+-T.The su#soil and sur"e0 infor'ation supplied to the Contractor is gi"en in goodfaith #ut the accurac0 is not guaranteed, and an0 "ariation #etween thisinfor'ation and actual site conditions will not #e accepted as the #asis of a clai'or reason for "ariation of contract rates.Co)t!a#to! s1all 6e !es-o)si6le /o! Clie)tte!i)g a), g!ou)+ 2ate!

e)#ou)te!e+ +u!i)g t1e e5#aatio) usi)g -!o-e! Clie)tte!i)g s,ste0a--!oe+ 6, CLIENT4 -!io! to a), #o)st!u#tio) 2o!3. All su#1 #ost o/

Clie)tte!i)g s1all 6e i)#lu+e+ i) t1e te)+e! !ates. 2.3 Site P!e-a!atio)

4inished ground le"el and finished floor le"els shall #e as per the appro"ed designand co'pati#le with the nearest Du#ai 'unicipalit0 road le"el. Co)t!a#to! toassess t1e e5isti)g g!ou)+ leels a)+ t1e )ea!est Du6ai 0u)i#i-alit, !oa+leels t1e -!o6a6le /i)is1e+ g!ou)+ leels a)+ /loo! leels a)+ i)#lu+e t1e#ost o/ ea!t12o!3 i) #utti)g>/illi)g 2it1 i) t1e -lot a)+ t1e s-a#e 6et2ee)-lot a)+ Du6ai 0u)i#i-alit, !oa+. Cost o/ all su#1 ea!t12o!3 s1all 6ei)#lu+e+ i) t1e te)+e! !ates.

2.! Te0-o!a!, A##ess

12


13/92

SPECIFICATION

The Contractor shall arrange for, construct, 'aintain and afterwards reinstatean0 te'porar0 access re6uired for and in connection with the e5ecution of thewors.

2.% Se!i#es

The Contractor shall #e responsi#le for the pro"ision of ser"ices in accordancewith the Contractual General e6uire'ents Sections of this Specification.

2.) ou)+a!, Wall a)+ Gates

The #oundar0 for the pu'p station site shall #e enclosed with a wall. The wallshall #e 2.2( 'etres high a#o"e the pa"ing le"el. Gates in the wall and fenceshall co'prise #oth 'ain dou#le gates and wicet gates and shall #e suppliedwith strong loc #olts with e0e padloc attach'ents and "ertical fi5ing #olts.(ai) Gate s1all 6e /ull, ele#t!i#all, o-e!ate+ a)+ !e0ote #o)t!olle+ as -e!CLIENT a--!oal.

2./ Roa+2a,s4 Pai)g a)+ Su!/a#i)g

oads, paring areas, pa"ing and surfacing within the co'pound shall #edesigned and constructed in accordance with the appropriate clauses latter in thissection.oad la0outs within the co'pound shall #e generall0 as shown on the plot plandrawings attached to this Specification a)+ s1all 6e as -e! t1e lo#al aut1o!it,!e7ui!e0e)t a)+ to t1e a--!oal o/ CLIENT.The ContractorIs proposed site la0out shall allow for "ehicular access to the"arious ite's of plant and e6uip'ent, for installation and su#se6uent'aintenance. The Contractor shall ensure that the road is le"elled, graded,

properl0 co'pacted with appropriate rollers and surfaced, to ensure that thefinished road is suita#le for the 'a5i'u' foreseea#le i'posed loads, which can

#e e5pected fro' "ehicle transporting the "arious ite's of plant and e6uip'ent.n detailing the la0out of the road and paring area, special attention 'ust #egi"en to the 'anoeu"ring of "ehicles deli"ering plant, stores, spares and other'aterials and e6uip'ent. oad width and turning radii shall #e ade6uate to taethe largest foreseea#le "ehicles and e6uip'ent, which can reasona#l0 #ee5pected. Pa"ing outside the plot shall #e pro"ided as per Du#ai &unicipalit0Isre6uire'ents a)+to the appro"al of C+-T.

Pre$cast concrete pa"ing #locs used in roads and surfacing shall co'pl0 withDu#ai &unicipalit0Is *d"isor0 ote (() dated


14/92

SPECIFICATION

Due care shall #e taen in surface water drainage design to ensure that grounderosion and flooding cannot occur, particularl0 around #uilding or e6uip'entfoundations.

Careful attention shall #e gi"en in the design of the wors to the effect that thewors 'a0 ha"e on the surface water drainage patterns of the area. Cul"erts shall

#e constructed if necessar0, particularl0 when e5isting natural water channels are#loced. Drainage shall #e pro"ided where necessar0 to pre"ent ponding and tocarr0 surface water awa0 fro' #uildings, structures and other wors, includingroads. Soa wa0s of ade6uate capacit0 shall #e pro"ided for stor' waterdrainage.

n the a#sence of a Du6ai (u)i#i-alit, 'ain drainage s0ste' the foul drainageshall ter'inate at a suita#l0 di'ensioned septic tan ha"ing 'ini'u' capacit0 of2( persons which shall #e of watertight construction and site at least 2( ' fro'an0 #uilding. * soa awa0 of suita#le si>e also shall #e pro"ided.

Drains shall #e laid with regular gradients such that full flow "elocit0 e5ceeds(./% '?sec, and 'anholes shall #e pro"ided at each change in direction. Drainsshall #e of ade6uate dia'eter and co"er shall #e at least 1.2 ' #eneath roads.Drains #elow roads, pa"e'ents and #uildings shall #e encased in concrete. *lldrainage wor shall #e as per Du#ai 'unicipalit0 re6uire'ent and to C+-Tappro"al.

2.9 Fou)+atio)s

4oundations shall #e capa#le of restricting settle'ents and other 'o"e'ents inser"ice to accepta#le li'its for the e6uip'ent or superstructure to #e erectedthereon.

*ll foundations shall #e in reinforced concrete. The 'ini'u' co"er toreinforce'ent shall #e /% '' and the ce'ent shall #e of a t0pe appropriate to theground conditions. -5tent of foundation for each #uilding?structure should,unless otherwise agreed, #e restricted within the peripher0 of the

#uilding?structure. here the ground is e5ca"ated for an0 reason #elow theunderside of the proposed foundation the "oid shall #e filled 2it1 #o)#!ete. A),oe! e5#aatio)s 6elo2 t1e /ou)+atio) 6li)+i)g leel s1all 6e /ille+ 2it1

st!u#tu!al 6a#3/illi)g i) ;?#0 la,e!s a)+ teste+ /o! ;::@ (DD at#o)t!a#to!s #ost. A), g!ou)+ 2ate! e)#ou)te!e+ +u!i)g t1e e5#aatio)s1all 6e Clie)tte!e+ usi)g -!o-e! Clie)tte!i)g s,ste0 a--!oe+ 6,CLIENT4 -!io! to a), #o)st!u#tio) 2o!3. All su#1 #ost o/ Clie)tte!i)g s1all6e i)#lu+e+ i) t1e te)+e! !ates.

2.1( E5te!)al Floo+lig1ti)g a)+ E0e!ge)#, Lig1ti)g

*de6uate floodlighting of outdoor areas shall #e pro"ided. -'ergenc0 lightingshall #e pro"ided #oth inside and outside the #uilding, to ensure the safet0 of'aintenance personnel in the e"ent of a power failure.

2.11 uil+i)gs

1!


15/92

SPECIFICATION

The general la0outs of #uildings are to #e 'aintained as shown, #ut 'inor'odifications 'a0 #e 'ade to pro"ide #uildings wholl0 suita#le for thee6uip'ent #eing pro"ided #0 the Contractor to satisf0 the re6uire'ents of other

parts of the Specification.

*ll #uildings shall #e designed to ha"e reinforced concrete fra'es, with infillpanel walls of concrete #loc wor. -5ternal walls shall #e concrete #loc wor,of 2(( '' thicness 'ini'u'.

Particular attention 'ust #e gi"en in the design of #uildings and la0outs to firepre"ention and safet0 of personnel at all ti'es. 4ire$ proof or fla'e$retarding'aterials are to #e used for floor, wall and ceiling finishes. here areas aredesigned, as ha"ing a fire resistant rating then 'aterials shall #e shown to ha"e

passed appro"ed standard tests for that class of fire resistance.

*ll floor sla#s shall #e constructed of reinforced concrete supported onreinforced concrete #ea's. 4loor finishes will #e designed to pro"ide highi'pact and a#rasion resistance. The finishes shall #e in accordance with theschedule of finishes.

-lectric o"erhead tra"elling crane Bs shall #e pro"ided in the pu'p house tofacilitate erection and 'aintenance of the e6uip'ent.

* 'ini'u' clearance of 1' #etween the top of e6uip'ent and an0 fittingssuspended fro' ceilings shall #e the criteria go"erning roo' heights.

-5ternal faces shall #e rendered and finished with an appro"ed pol0urethanepaint s0ste'. nternal faces shall #e plastered and painted with appro"edwasha#le e'ulsion. Sirting shall 'atch the floor finish.

nternal partition shall #e fire #arriers rated for 'ini'u' 1 hr. and of appro"ed'aterial?design.

*ll structures shall #e designed to carr0 the loads i'posed #0 the structure itself,together with li"e loads in accordance with and appro"ed standard or code of

practice.

E5te!)al a)+ I)te!)al +oo!s s1all 6e o/ Steel u)less ot1e!2ise s-e#i/ie+ i)t1e +!a2i)gs. Wi)+o2s a)+ Loue!s s1all 6e alu0i)iu0 2it1 alu0i)iu0/!a0es. 4ire rated doors shall #e in accordance with 4P* 8( and shall #e ofstandard construction. Doors and windowsills shall #e finished with appro"ed'ar#le sill. *ttention should #e paid to the pro"ision of enough natural light inthe #uildings.

*ll doors opening outwards fro' the #uildings shall #e pro"ided with paniclatches or #olts, which o"erride an0 locing de"ice, for escape in the e"ent offire. Door closers shall #e fitted to all doors. Door la#els incorporating electrical@a>ard warning in *ra#ic and -nglish shall #e fi5ed to each entr0 door. ision

panels shall #e pro"ided to fre6uentl0 used doors.

1%


16/92

SPECIFICATION

oofs of #uildings shall #e reinforced concrete sla# construction, suita#l0insulated and waterproofed. Steel staircase with necessar0 landings shall #e

pro"ided to per'it eas0 access to the roof and to e6uip'ent at roof le"el. oof'ounted e6uip'ents if an0 shall #e co"ered #0 appro"ed screens for #etterele"ation?aesthetics.

*ll roofs shall #e i'per"ious to rain and pro"ide a rapid run$off of rainwater.Special attention shall #e gi"en to the waterproofing of all roofs, sealing of all

oints, allowance for ther'al and shrinage 'o"e'ents.

oof drainage shall #e constructed so that water will not enter the #uilding in thee"ent of #locages. ainwater down pipes shall #e e5ternal to the #uildings.

The do'estic water suppl0 s0ste' shall include all plu'#ing, underground pipewor, high and low le"el storage tans, "al"es, fittings and pu'psBncluding the pro"ision of a stand#0 pu'p for the pro"ision of a pressurisedwater suppl0 s0ste' for the static water tan and all #uildings within theco'pound.

ed in accordance with an appro"ed code of practice.The Contractor shall #e responsi#le for the pro"ision and installation of a watersuppl0 ser"ing the #uildings. -"er0 cistern, sin, #asin, etc., shall #e pro"idedwith a stopcoc in the suppl0 pipe adacent to the fitting. -ach #asin, sin andshower unit is to #e pro"ided with #oth hot and cold water. Pro"ision shall #e'ade for connection to the drining water suppl0.

Toilets shall #e pro"ided with 1 o. estern t0pe C, 1 o. *siatic t0pe C,1 o. ash$hand #asins, 1 o. wall 'ounted 'irrors, 1 o electric hand dr0er,rated for 1(,((( hours of 'aintenance free ser"ice. -ach C shall #e pro"idedwith a hand spra0. *ll necessar0 fittings and accessories shall #e pro"ided.

2.12 Ca6le T!e)#1es

The Contractor is responsi#le for all ci"il wors re6uired for the installation ofca#les. Desig) o/ #a6le t!e)#1 s1all 6e +o)e to a##o00o+ate all #a6les 2it1-!o-e! s-a#i)g4 2it1 eas, a##ess /o! 0ai)te)a)#e. Ca#le entries into #uildingsshall #e through ducts or in ca#le trenches. *ll ca#le runs in #uildings shall #ewithin the ca#le trenches, pro"ided with checer plate co"ers. The co"ers fore5ternal ca#le trenches shall #e of pre$cast concrete. *ll ca#le trench co"ers shall

#e of suita#le weight and si>e such that the0 'a0 #e re'o"ed or replaced #0 no'ore than two 'en without the use of a crane or special lifting e6uip'ent.

2.13 A--!oal o/ 0ate!ials

C+-T shall ha"e the right to order that an0 'aterials, which do not 'eet withtheir appro"al, shall not #e used in the wors. The Contractor shall ha"e theright to sa'ple, test and gi"e an opinion on such 'aterials. CLIENT s1all o!+e!/o! t1i!+ -a!t, #e!ti/i#atio) /!o0 CLIENT a--!oe+ sou!#es4 o) a), o! all

1)


17/92

SPECIFICATION

0ate!ials i/ t1e test #e!ti/i#ates -!o+u#e+ 6, t1e #o)t!a#to! a!e /ou)+u)satis/a#to!,. f after this the 'aterials are reected #0 C+-T theContractor shall re'o"e the' fro' the site. Sa'ples of 'aterials appro"ed shall

#e 'ade a"aila#le.

3. DESIGN OF THE WORKS

3.1 Desig) a)+ D!a2i)gs

The Contractor shall design the ci"il engineering and #uilding wors and prepareco'plete woring drawings as necessar0 for the construction of the wors.

3.2 Lia6ilit,

The design of all the wors shall #e the responsi#ilit0 of the Contractor and thisspecification shall #e used as the #asis for the design.

3.3 Sta)+a!+s a)+ Co+es o/ P!a#ti#e

Ci"il engineering and #uilding wors and ser"ices shall all #e designed andconstructed in accordance with the rele"ant ritish Standard or e6ui"alentappro"ed Codes of practice for the purpose of satisf0ing the uildingegulations of the Du#ai &unicipalit0 and o#taining the necessar0 uildingPer'it appro"al fro' the +ocal *uthorit0 as re6uired.

The Standards and?or codes of practice e'plo0ed throughout the wors, wherethe0 do not conflict with the local #0$laws, shall #e of the ritish Standardsnstitution.Latest e!sio) o/ all S #o+es o! ot1e! sta)+a!+s4 s-e#i/ie+ s1all6e /ollo2e+.

*s far as practica#le the standards or codes adopted shall #e consistentthroughout an0 section of the wors e5cept in 'eeting superior specifiedre6uire'ents.

The Contractor shall in"estigate the e5istence of an0 regulations and local #0$laws go"erning the proposed wors and he shall #e dee'ed to full0 co'pl0 withsuch re6uire'ents.

The Contractor shall include with his tender a schedule of standards and codes to#e followed in design and construction of the wors. Copies of these codes andstandards shall #e 'ade a"aila#le to C+-T during the design and construction

period. n the case of standards and codes not pu#lished in -nglish, theContractor shall o#tain -nglish translations when re6uired and send the' toC+-T. n addition, the Contractor shall ha"e a"aila#le in his place of #usinessBor in his supplierIs wors and on site, copies in -nglish of the rele"antstandards or codes used, for the sole use of C+-T.The failure of the Contractor to pro"ide a schedule of standards and codes for hiswors shall #e taen to 'ean that he intends his wors to co'pl0 with thespecific standards and codes referred to in this specification.

1/


18/92

SPECIFICATION

3.! Su60issio) o/ Desig)s a)+ D!a2i)gs

The Contractor shall #e re6uired to produce full design calculations for thefoundations, #uilding structures, #uilding ser"ices, etc. and detailed woringdrawings and #ending schedules, etc. @e shall #e responsi#le for the detaileddesigns, strength and safet0 of the structures, to 'eet the structural, acoustic anden"iron'ental re6uire'ents of the #uildings and other wors. @e shall #eresponsi#le for ensuring that the design satisfies the re6uire'ents of allauthori>ed local and national #odies. Design calculations and detailed drawings'ust #e su#'itted to C+-T for re"iew #efore the rele"ant construction woris carried out and at least si5 wees #efore the rele"ant drawing is re6uired onsite. The ContractorIs progra''e shall allow at least 3( da0s for C+-TISre"iew and at least one re"ision following C+-T initial re"iew. Designcalculations shall #e in accordance with an appro"ed 'ethod of co'putation andshould tae account of the 'ost u)/aou!a6leco'#ination of dead load, li"eload, and wind load. +i"e loads shall #e in accordance with S. )399 part 1. *

#asic wind speed B3 set gust 1$in $%(0r return period of !% '?s at a height of 1(' a#o"e ground le"el shall #e assu'ed or as s-e#i/ie+ 6, Du6ai 0u)i#i-alit,/o! t1e 6uil+i)g st!u#tu!al +esig). The design of all #uildings, structures andco'ponents shall resist wind loads calculated in accordance with ritishStandard CP3 chapter , part 2.

The structures and all parts thereof shall #e capa#le of withstanding within theprescri#ed settle'ent, deflection and stress li'its, the worst practica#leco'#ination of dead and li"e loads, wind and erection forces, secondar0 stresses,i'pact, te'perature and shrinage effects e5cept that wind and seis'ic forcesshall not #e assu'ed to act together.

*ll structural and secondar0 ele'ents shall #e designed to withstand "ertical andhori>ontal accelerations due to an earth6uae of (.(/ g.Seis'ic design shall follow ndian Standard S. 1893.

Su#'ission of designs and drawings should #e at regular inter"als, to ensure astead0 flow of su#'issions. e"iews 'a0 #e dela0ed if large 6uantities ofdrawings are su#'itted at an0 one ti'e.

3.% Reie2 6, CLIENT

e"iew of the ContractorIs drawings or calculations #0 C+-T shall not relie"ethe Contractor of an0 of his o#ligations to 'eet all the re6uire'ents of theContract or relie"e the Contractor of the responsi#ilit0 for the correctness ofsuch drawings.

The Contractor shall 'ae an0 changes in the design, which are necessar0 to'ae the wor confor' to the pro"isions and intent of the Contract.

3.) Detail Re7ui!e0e)ts /o! Su60ittals

18


19/92

SPECIFICATION

Cal#ulatio)s*ll calculations related to ci"il, structural and #uilding wor shall #e su#'itted toC+-T in -nglish.

Calculations shall clearl0 identif0 the su#ect of the calculations and shall include#ut not #e li'ited to pro"iding the following infor'ationE

ContractorIs na'eProect na'eDesignerIs na'eChecerIs na'eContract nu'#er

a'e of the ite'*ssu'ption used for design purposesCodes used+oadings usedDate of CalculationCalculationeference sources&anufacturersI na'es and literatureeference to the appropriate drawingTechnical specification section and paragraph nu'#erControl registers reference all as applica#le.

*ll calculations shall #e on *! si>e paper and shall #e #ound in stiff #aced ring#inders. The co"ers shall indicate the ContractorIs na'e, and the re"ision letterof the calculations.

*ll co'puter printouts shall #e #ound into an appropriate #inder with co"erwhich shall indicate the ContractorIs na'e, the Contract na'e, the title of thesu#ect, the date of su#'ission and re"ision letter of the printout.

here use is 'ade of a co'puter, details shall #e gi"en of the progra's used andan0 certification of appro"al #0 independent authorities shall #e gi"en for the

progra's used. 7se of such progra's shall #e to the appro"al of C+-T.

D!a2i)gs

Drawings to #e used for Construction DrawingsH and record shall #e preparedon *1, *3 and *! si>e sheets onl0 unless otherwise e5pressl0 appro"ed #0C+-T.

Drawing and data sheets prepared #0 the Contractor shall include co'pleteconstruction details. The drawings shall include #ut not #e li'ited to thefollowing infor'ation or detail as applica#leE construction oints, reinforce'entdetails and #ar #ending schedules, details for unusual or special ite's offor'wor, special trenching, structural steel detailing, architectural drawings andschedules.

19


20/92

SPECIFICATION

Specific changes shall #e clearl0 designated on the drawings with the re"isionletter shown in an adacent triangle.

*ll drawings shall #e drawn, designed, checed, re"iewed and signed #0 theContractor #efore su#'ittal.

3./ Fi!e C!ite!ia

The Contractor shall 'ae pro"ision in the design of the #uilding structure for'ini'u' periods of fire resistance in accordance with The ritish uildingregulations 198% $ Part $ 4ire $ 2?3?! 4ire Spread. The designation of

purpose group and t0pe to #e used for the uildings shall #e JndustrialI seeTa#le ).1, page 32, under purpose group JndustrialI.

4or calculating the 'a5i'u' di'ensions the following definitions shall appl0 E$

Ba *reaH, in relation to a #uilding, 'eans the area calculated #0 reference to itsfinished internal faces E

B# 4loor areaH 'eans the aggregate area of e"er0 floor in a #uilding or e5tension,calculated #0 reference to the finished internal faces of the walls enclosing theareas, or if at an0 point there is no such wall, #0 reference to the outer'ost edgeof the floor.

Bc @eightH 'eans the height of the #uilding 'easured fro' the 'ean le"el of theground adoining the outside of the e5ternal walls of the #uilding to the le"el ofhalf the "ertical height of the roof of the #uilding, or to the top of the walls or ofthe parapet, if an0, whiche"er is the higher.To restrict the spread of fire, certain walls and floors shall #e designated as fireco'part'ent #arriers. 4ire co'part'ent #arriers shall pro"ide co'plete #arrierto spread of s'oe heat and other products of co'#ustion. The #arriers shallha"e a rating of 1$hour 'ini'u'. *ll openings in walls?floors for entr0?e5it ofca#les shall #e sealed with appro"ed fire sealant rated for 'ini'u' 1 hour.

3.8 Seis0i# Loa+s

The proposed wors are located in an area su#ect to earth6uaes, intensit0 of on the &odified &etric scale. *ll structural and secondar0 ele'ents shall #edesigned to withstand "ertical and hori>ontal accelerations due to an earth6uaeof (.(/g.

Design shall follow ndian standard SE 1893 $ 198!E eco''endations for-arth6uae esistant Design of StructuresH.

3.9 Roa+ Loa+s

The Contractor shall design the roads to an appro"ed standard and show thedesign to #e satisfactor0 for the 'a5i'u' load anticipated during either theconstruction or operational phase of the wors.

2(


21/92

SPECIFICATION

3.1( D!ai)age

Drainage shall #e designed in accordance with rele"ant Codes of Practicepu#lished #0 the ritish Standards nstitution, "i>E S )(31, S )3)/ and S83(1.All +!ai)age +esig) a)+ 2o!3 s1all #o0-l, 2it1 D( +!ai)age+e-a!t0e)t !e7ui!e0e)ts.

n the neigh#ourhood of e'#an'ents and cutting surface water run$off is to #econtrolled #0 the pro"ision of lined drainage channels. Pro"ision shall #e 'adefor the disposal of surface water fro' roads.

Surface water fro' roofs of #uildings shall #e drained to down pipes, whichconnect with the site drainage s0ste'.

The following intensities of rainfall shall #e used for design of drainageE $

oofs /% ''?hr Site 1% ''?hr

The Contractor shall ascertain whether 'ain foul drainage is a"aila#le locall0,and if so, arrange'ents are to #e 'ade to connect fro' the pu'p station toiletsinto this s0ste'. here 'ain drainage is not a"aila#le foul drainage shallter'inate at suita#l0 di'ensioned septic tan ha"ing 'ini'u' capacit0 for 2(

persons. * soa awa0 of suita#le si>e also shall #e pro"ided.

The septic tan shall #e constructed in an agreed position at least 2( 'etersfro' an0 #uilding. The design shall #e to recogni>ed standards such as S )29/and appro"ed #0 the -ngineer. The settling co'part'ent shall ha"e a slopingfloor and su'p for eas0 re'o"al of sludge when necessar0. The tan shall ha"eseparate fresh air inlet and outlet pipes and #e pro"ided with access opening.The effluent fro' the tan shall #e drained to a soa$awa0 pit of ade6uatecapacit0, constructed with walls of solid concrete #locs laid on their

sides. The soa$awa0 pit shall #e co"ered #0 a concrete sla#, with accessthrough a 'anhole co"er.

Septic Tan and soa wa0s for foul drainage as well as stor' water drainageshall #e located gi"ing due consideration and with consultation?appro"al of thelocal *uthorities so that in future when 'ain sewerage?stor' water drainage networ for the area is 'ade a"aila#le these ser"ices 'a0 #e connected to the 'ainline easil0.

3.11 Fou)+atio)s

4oundations shall #e designed and constructed in accordance with thereco''endations of S 8((! code of practice for 4oundationsH to safel0

pre"ent o"er turning, #ase failure, uplift and sliding. Due consideration shall #etaen to the ris of detri'ental defor'ation and settle'ent of the soil. *ngulardistortion, hori>ontal and "ertical 'o"e'ents of the foundations as a result ofco'pression of the soil, 'ust not e5ceed that which is accepta#le with regard to

21


22/92

SPECIFICATION

the resulting forces in the structures and the safe operation of the e6uip'ent.

Spread foundations shall #e designed such that tension or pressure areas shallnot de"elop under the foundations where for'ation le"el is #elow the naturalground water ta#le. -5tent of foundation for each #uilding?structure should,unless otherwise agreed, #e restricted within the peripher0 of the

#uilding?structure.

hen calculating the resistance to o"erturning of foundations no account shall#e taen of the friction #etween the sides of the #ase and the surroundingground, unless agreed with the -ngineer.

!. SU"SOIL INVESTIGATIONS

*ll su#$soil in"estigation re6uire'ents are the responsi#ilit0 of the contractor.4actual reports on ground in"estigations attached to this docu'ent is forinfor'ation onl0.

%. SETTING OUT AND TOLERANCES

The Contractor is responsi#le for the accurac0 of all setting out andconstruction as followsE.

Ba Principal setting out 1 in !%((

B# Construction tolerances E$ &a5. Tolerance B''

$ uilding 4oundations align'entle"el

specific di'ensions

%

%

K2%, $ 1(

$ uilding 4ra'ewor "erticalit0align'entle"el

1 E 1%((

3

3

$ Concrete or "erticalit0le"elalign'entopeningsspecific di'ensions

1 E 1%((

3

3

%

%

$ &ass Concrete orloc alls

"erticalit0align'ent

1 E 1(((

%

The -ngineer 'a0 at his discretion alter or specif0 new tolerances as necessar0.

). EXCAVATION AND EARTHWORKS

).1 a#3/ill

22


23/92

SPECIFICATION

7nless otherwise descri#ed, directed or per'itted, fill shall consist of per"iousnaturall0 occurring suita6le'aterial, free fro' cla0, silt and "egeta#le or otherinurious 'atter and water$solu#le salts har'ful to copper and other 'etals.(ate!ial s1all 6e teste+ to assess t1e suita6ilit, /o! /illi)g as -e! CLIENTi)st!u#tio). Suita6le fill 'aterials shall #e i'ported onl0 fro' appro"edsources i/ t1e e5isti)g 0ate!ials /ou)+ u)suita6le.

).2 E5#aatio)s Ge)e!all,

The whole of the e5ca"ations shall #e carried out to the widths, lengths anddepths shown on the appro"ed drawings and in accordance with S )(31 andS 8((!.(et1o+ state0e)t s1all 6e su60itte+4 /o! CLIENT a--!oal4 2it1#!oss se#tio) +!a2i)gs /o! e5#aatio) -!io! to a), e5#aatio). ounlicensed or indiscri'inate digging shall #e per'itted.

The Contractor shall allow for ris of 'eeting and ha"ing to e5ca"ate throughan0 sort of 'aterial including roc.

The Contractor 'a0 e5ca"ate #0 an0 'ethod he considers suita#le, su#ect tothe C+-TIS appro"al and shall allow for the use of t0pes of plant 'ost suitedfor e5ca"ation in an0 location and at an0 ti'e.

The Co)t!a#to!*s !ate s1all include for Clie)tte!i)g and all strutting andshoring necessar0 for the safe e5ecution of the wors.).3 E5#aate+ (ate!ials

&aterials fro' the e5ca"ation 'a0, if appro"ed #0 the -ngineer, #e used #0 theContractor in the construction of the ors.


24/92

SPECIFICATION

properties or sites. ater ta#le to #e #rought down to 'ini'u' 3(( '' #elowthe foundation le"el.

The cost of pu'ping or other Clienttering shall #e co"ered #0 the Contractor inhis tender. o concrete, 'asonr0, #ricwor or other 'aterials shall #e placedor #uilt until the surfaces are properl0 drained.

).) 4illing and einstate'ent

4illing for trenches, e5ca"ations and le"elling of the site shall #e deposited inla0ers not e5ceeding 2%('' un co'pacted in thicness each la0er wateredwhen necessar0 and well #o0-a#te+ or otherwise consolidated to 'ini'u'9%L of the 'a5i'u' dr0 densit0 o#tained #0 the use of an appro"ed standardco'paction test or to C+-TIs satisfaction.

here e5ca"ations, whether in roc or other 'aterial, are 'ade to a greaterdepth than re6uired or ordered #0 C+-T, the inter"ening space shall #e

#rought up to the proper le"el in plain concrete.

*n0 for'ation, which in the opinion of C+-T, is not sufficientl0 good tocarr0 the loads, which shall #e i'posed on it, shall #e e5ca"ated and replacedwith concrete.

)./ Slips and Settle'ents

Should an0 slips occur in the e5ca"ations, #ans or filling during the e5ecutionof the wors or during the Defects +ia#ilit0 Period fro' an0 cause whatsoe"er,the Contractor shall e5ecute the necessar0 re'edial wors in such 'anner andfor', and with such 'aterials as C+-TIs epresentati"e shall appro"e.

The Contractor shall 'ae good all settle'ent of filling that 'a0 occur up to theissue of the last 4inal Certificate.

).8 -5plosi"es

The use of e5plosi"es shall not #e per'itted as a general rule. n cases whereC+-T 'a0 authori>e their use and notwithstanding such authorit0 or otherconditions i'posed #0 C+-T, the Contractor shall re'ain responsi#le fortheir use including inur0 to an0 person or an0 da'age to propert0, and for theirsafe storage. The Contractor shall 'ae his own arrange'ents for the safestorage, the o#taining of per'its fro' appropriate local *uthorities and for the

pa0'ent of fees and licenses and all other 'atters connected therewith.

The Contractor shall e'plo0 onl0 properl0 6ualified wor'en in the handlingand firing of charges. n order to pre"ent inur0 to life and da'age to propert0,ade6uate safet0 precautions shall #e taen and proper warnings shall #e gi"en ofall #lasting operations. lasting shall onl0 tae place at such ti'es as 'a0 #eappro"ed #0 C+-T.

2!


25/92

SPECIFICATION

).9 Co'pacted 4ill *reas

n areas where e5ca"ated or i'ported 'aterial is to #e used as co'pacted fill,the Contractor shall #e re6uired to achie"e a densit0 of not less than 9%L of thetest densit0 for the e5ca"ated or i'ported 'aterial. *ll tests and e6uip'ent fordeter'ination and checing of the specified densit0 shall #e carried out andsupplied #0 the Contractor in the presence of C+-T representati"e and his

price is dee'ed to include for this.

/. PILING

/.1 Sta)+a!+s

Piling wor, 'aterials and tests shall co'pl0 with the following Codes ofPractice and Standards, together with all Statutor0 egulationsE

Title Su6=e#t

S 8((! Code of Practice for 4oundations&odel Specification for Piling nstitution of Ci"il -ngineersS 811( Structural use of concreteS %328 &ethods of specif0ing concrete

/.2 Ge)e!al Re7ui!e0e)ts

The piles shall #e designed to carr0 at least twice the woring load and this shall#e deter'ined #0 nor'al design procedures.

The pile shall #e ade6uatel0 anchored into pile caps in accordance with seis'icdesign practice.

/.3 Proprietar0 Piling S0ste's

here a piling s0ste' is not e5clusi"el0 co"ered #0 the a#o"e specifications, thecontractor shall su#'it to the -ngineer for appro"al full details of the s0ste' he

proposes to use. Details shall include design, suita#ilit0, case studies etc. Thisinfor'ation shall #e su#'itted at least ) wees #efore the use of the s0ste' isre6uired on site.

8. ROADS AND OTHER SURFACES:

8.1 Ge)e!al

Su#station roads and paring areas shall #e properl0 defined, co'pacted andpa"ed with interlocing concrete #locs 8('' thic. Pedestrian walwa0s shall#e with )('' thic interloc pa"ing #locs. Top CC sla# of septic tan to #e/% '' lower than G+ and to #e co"ered 2it1;::00 t1i#3 la,e! sto)e #1i-s.*ll other co'pound surfacing shall #e stone chippings u)less s-e#i/ie+ i) t1e+!a2i)gs.

2%


26/92

SPECIFICATION

8.2 (ate!ials

@ardcore shall consist of natural stone or 'asonr0 #roen to pass a /% to 1(('' ring. t shall #e free fro' dust, ru##ish, wood, "egeta#le or other inurious'atter.

roen stone and chippings for use as site surfacing shall consist of hardcrushed natural stone.

8.3 D!ai)s4 Se2e!s a)+ Ca6le Du#t

*ll drains, sewers, ca#le ducts and other necessar0 wor #elow for'ation le"elshall #e co'pleted, inspected and a--!oe+ #0 C+-T #efore theconstruction of an0 or path is started.

8.! P!e-a!atio) o/ Fo!0atio) /o! site su!/a#i)g a)+ i)te!)al !oa+sE

The upper 3(( '' of the for'ation shall #e of suita#le soil, otherwise theContractor shall i'pro"e it to the -ngineerIs satisfaction or 3(L C #0

#lending it with granular 'aterials such as gra"el or sand.

The for'ation shall #e rolled to an e"en and unifor' surface, which shall #eparallel to the finished surface of the road or path. Co0-a#tio) s1all 6e#a!!ie+ out 2it1 a to ;: to) -o2e! +!ie) !olle! to a 0i)i0u0 o/ 9?@(DD4 u)less ot1e!2ise o!+e!e+ o! -e!0itte+ 6, CLIENT .

8.% Su#$#ase

*fter the for'ation has #een properl0 'ade, rolled and appro"ed #0 C+-T, asu#$#ase consisting of well graded natural sands, gra"els or roc or 'i5turesthereof shall #e laid and co'pacted to 'ini'u' 9%L of &DD, to gi"e afinished thicness of at least 2(( '' or as descri#ed or directed.

The 'aterial shall #e free of deleterious 'atter and shall #e well graded ha"inggrading si'ilar to ta#le gi"en #elowE

S S-- SM- P-C-T*G- N &*SS P*SSG

/% '' 1((3/.% '' 8% $ 1((1( '' !( $ /(% '' 2% $ !%(.) '' 8 $ 22(.(/% '' ( $ 1(

8.) I)te!lo#3 Pai)g lo#3s

The for'ation and su#$#ase for road areas with interloc pa"ing #locs shall #e

2)


27/92

SPECIFICATION

as descri#ed in Clauses 8.! and 8.% a#o"e. nterloc pa"ing #locs shall #eplaced in a herring #ond pattern on a ?:00 t1i#3 la0ing course of coarse sanda#o"e the su#$#ase.

8./ C!oss /all

n the case of roads with a straight cross fall, this fall shall #e not 'ore than 1 in!( and not less than 1 in !8. ith roads to #e ca'#ered the a"erage fall of thefinished surface fro' the crown to the road edge shall #e not 'ore than 1 in 3(and not less than 1 in !%.

8.8 7p$stand er#s and recessed er#s

Pre$cast concrete er#s to S /2)3 set on a concrete #ed shall #e laid on eachside of the roads?paring areas to define the li'its for "ehicular access.

8.9 4ootpaths and Trench Co"ers

nterlocing concrete #loc pa"ing shall #e pro"ided for footpaths. Pa"ing#locs shall #e )('' thic and laid in a herring #ond pattern.

Trench co"ers shall #e 'ini'u' of )( '' thic and pro"ided with handles orholes for lifting purposes. The0 shall #e reinforced concrete to the appro"al ofC+-T. The reinforce'ent shall #e in the 'iddle of the co"ers. The #earingedges of co"ers shall #e reinforced with 'in. %( 5 %( 5 ) '' thic hot dippedgal"ani>ed steel angle.

here concrete co"ers are re6uired for trenches crossing roads, these shall #edesigned for the hea"0 wheel loads e5pected on the' and shall #e speciall0reinforced as necessar0.

8.1( Sto)e Su!/a#i)g

Stone chippings for use as surfacing are to #e clean hard crushed stone gradedfro' 1) $ !( ''.

The for'ation in areas where stone chippings are to #e used shall #e wellco'pacted to the appro"al of C+-T.

9. CONCRETE

9.1 CODE OF PRACTICE

hen re6uired #0 this Specification reference shall #e 'ade to the followingritish Standard Codes of PracticeE

S %328E 1981 &ethods for specif0ing concrete,including read0 'i5ed concrete.

S 811( The Structural 7se of Concrete

2/


28/92

SPECIFICATION

9.2 CEMENT

9.2.1 Ce0e)t$

The ce'ent 'a0 #e Portland BS 12, sulphate$resisting Portland BS !(2/ orsuper sulphated BS !2!8 depending on the soil and ground water saltconcentrations. The t0pe of ce'ent shall #e #ased on ta#les ).1 and ).2 of S811(. The ce'ent shall #e tested to deter'ine the total alali content inaccordance with S !%%( Part 2 or else *.S.T.&. C111!$)9 BChe'ical *nal0sisof @0draulic Ce'ent.

The e6ui"alent weight of sodiu' o5ide shall #e calculated fro' the followingfor'ulaE

-6ui"alent weight of a2< O t. of a2< K (.)%8 5 t. of 2


29/92

SPECIFICATION

The ter's 4ine *ggregateH, SandH, Coarse *ggregateH and *ll$in*ggregateH are to #e as defined in S.882.

*ll$in *ggregate shall not #e used in the wors e5cept as specificall0 re6uired #0 the Contract or authorised #0 C+-T.

4ine and coarse aggregates for concrete shall co'pl0 in all respects with S 882and shall #elong to a petrologic group appro"ed #0 C+-T.

*ggregates for plain and reinforced concrete shall #e o#tained fro' a sourcenown to produce aggregates satisfactor0 for concrete, and if re6uested #0C+-T, the Contractor shall suppl0 e"idence to this effect. Sa'ples of theaggregates, which the Contractor proposes to use, shall #e supplied for the

purpose of 'aing preli'inar0 concrete test cu#es as hereinafter specified.

*s and when re6uired #0 C+-T the Contractor shall suppl0 all or an0particulars of the aggregates as listed in *ppendi5 * of S 882 #efore the'aterials are used for the construction in an0 of the ors.

The Contractor shall ensure as far as possi#le that the particle shape and gradingof the aggregate re'ain unifor' during the progress of the wor #ut if an0significant "ariations occur, C+-T 'ust #e notified and an0 'odificationsre6uired shall #e carried out to his satisfaction.

f so re6uired #0 C+-T, tests of the aggregate shall #e 'ade. Therepresentati"e sa'ples selected #0 C+-T shall #e deli"ered to a prescri#edla#orator0 and tested in co'pliance with the respecti"e procedures specified inS812. The test results of appro"ed aggregates shall #e hereinafter specified,relati"e and li'iting 6uantities #eing dee'ed to #e percentages #0 weight unlessthe conte5t otherwise i'plies.

Coarse aggregates shall consist of naturall0 occurring gra"el, crushed oruncrushed stone, or a co'#ination thereof, and shall #e free fro' chal, ha"e

pro"en frost resistance properties and shall not #e of a fla0, la'inated or porouscharacter. The pieces shall #e angular or rounded in shape and shall ha"egranular, cr0stalline or s'ooth B#ut not powder surfaces. The a'ount of fine

particles occurring in a free state or as a loose adherent shall not e5ceed one percent.

7nless otherwise specified, descri#ed or directed, the 'a5i'u' no'inal si>e ofthe coarse aggregate shall #e !( '' for use in 'ass concrete and 2( '' forreinforced concrete and its grading shall #e within the li'its specified in Ta#le !of S.882.

4ine aggregates shall #e natural sand or sand deri"ed #0 crushing suita#le gra"elor natural stone and shall #e free fro' coagulated lu'ps.

The grading of the fine aggregate shall #e within the o"erall li'its as gi"en inTa#le % of S.882. The additional li'its for grading shall not #e used for an0

29


30/92

SPECIFICATION

concrete that is to #e reinforced e5cept with specific appro"al of C+-T. Thefine aggregate shall #e so graded that when 'i5ed with the coarse aggregate andce'ent shall produce a concrete of 'a5i'u' densit0.

The 'a5i'u' salt content of aggregates recei"ed on site shall not e5ceed the following li'its as percentages #0 weightE

Solu6le C1lo!i+esBas Na Cl8

""""""""""""""""""""""""

Solu6le Sul-1atesBas So8

""""""""""""""""""""""""""4ine aggregate (.1(

(.!( in totalCoarse aggregate (.(3

The aggregate li'its 'a0 re6uire adust'ent due to the chloride and sulphate content of#oth ce'ent and water. The adust'ent shall #e such that the percentages #0 weight ofthe ce'ent in the concrete do not e5ceedE

Solu#le ChloridesBas a Cl

$$$$$$$$$$$$$$$$$$$$$$$

Solu#le SulphatesBas So3

$$$$$$$$$$$$$$$$$$$$$$$Concrete (.32 !.(

outine tests of the aggregates shall #e carried out on a regular #asis to deter'ine thechloride and sulphate content.

&aterials $ Generall0

*ll 'aterials used in the 'anufacture of concrete shall #e of the sa'e t0pe and shall #eo#tained fro' the sa'e appro"ed source throughout continuous construction.Co)t!a#to! s1all a!!a)ge to #o)+u#t all tests4 s-e#i/ie+ /o! #o)#!ete4 agg!egate42ate! a)+ #e0e)t4 i) a), i)+e-e)+e)t la6o!ato!, a--!oe+ 6, CLIENT -!io! to

t1e #o)#!ete 2o!3 o! a), ti0e +u!i)g t1e #o)st!u#tio)4 as !e7ui!e+ 6, CLIENT.

9.! WATER

Clean fresh water onl0 shall #e used for concrete 'ortar or grout. t shall #e free fro'har'ful sulphates, li'e or other deleterious 'aterials either in solution or in suspension.

f so re6uired #0 C+-T, sa'ples of water collected in an appro"ed 'anner shall #eanal0sed or used for the purpose of 'aing concrete tests, to ensure that the water issuita#le for 'aing the concrete.

The te'perature of stored water will increase due to solar gain and this in turn willreduce the setting ti'e for concrete. The Contractor shall tae this fact into accountwhen preparing concreting progra''es.

3(


31/92

SPECIFICATION

Tests on water for 'aing concrete shall co'pl0 in all respects with S 31!8.

9.% REINFORCEMENT

9.%.1 Rei)/o!#e0e)t$

7nless otherwise specified, descri#ed or directed, reinforce'ent shall #e of high 0ielddefor'ed steel #ars and shall co'pl0 in all respects with S !!!9.

Cold twisted steel #ars shall #e used in the ors onl0 where specified or descri#edon the drawings or as directed #0 C+-T. The0 shall co'pl0 in all respects withS.!!)1.

*ll reinforce'ent shall #e free fro' pitting, loose rust, 'ill scale, paint Be5cept foridentification purpose, oil, grease, adhering earth or an0 other 'aterial that 'a0i'pair the #ond #etween the concrete and the reinforce'ent, or that 'a0 causecorrosion of the reinforce'ent, or disintegration of the concrete.

The reinforce'ent shall #e efficientl0 protected against deterioration during transportand whilst stored upon the site to the satisfaction of C+-T.

-ach consign'ent of reinforce'ent for use in the wors shall #e acco'panied #0 acertificate gi"ing the ulti'ate strength, 0ield point and elongation, and the result ofthe cold #ond test, for each si>e of #ar included in the consign'ent. *ll tests for the

purpose of o#taining the infor'ation on these certificates shall co'pl0 withprocedure descri#ed in S !!!9 or S !!)1 whiche"er is applica#le.

einforce'ent shall #e stored clear of the ground on sufficient supports to pre"entdistortion of the #ars. &ild steel and high tensile steel are to #e stored separatel0.

einforce'ent shall #e #ent cold #0 appro"ed 'eans to the di'ensions shown onappro"ed #ending schedules.

*ll reinforce'ent shall #e free fro' oil, grease, paint, dirt, loose scale or rust at theti'e of concreting.

einforce'ent shall #e rigidl0 fi5ed in the positions shown on appro"ed drawings,using soft plia#le annealed steel coated #inding wire of 1.) '' dia'eter, to pre"ent'o"e'ent during concreting and to 'aintain the specified co"er to #ars. Chairs andconcrete spacer #locs shall #e pro"ided as re6uired to achie"e the designed #ararrange'ent.

Concrete co"er to reinforce'ent shall #eE

*ll surfaces in contact with earth $ /% ''Superstructure and internal surfaces $ !( ''

Testi)g o/ Rei)/o!#e0e)t

31


32/92

SPECIFICATION

C+-T shall ha"e the right to select at an0 ti'e sa'ples of steel reinforce'ent fortesting in accordance with the rele"ant appro"ed standard.

9.%.2 Steel Fa6!i# Rei)/o!#e0e)t

7nless otherwise specified, descri#ed, or directed, steel fa#ric for concretereinforce'ent shall #e in the for' of hard drawn steel wire fa#ric and shall co'pl0 inall respects with S !!83.

Twisted steel fa#ric for concrete reinforce'ent shall onl0 #e used in the orswhere specified or directed #0 C+-T and shall co'pl0 in all respects with S!!83.

-5panded 'etal steel fa#ric for concrete reinforce'ent shall onl0 #e used in theors where specified or directed #0 C+-T and shall co'pl0 in all respects withS !!83.

-ach consign'ent of steel fa#ric reinforce'ent shall #e acco'panied #0 a certificategi"ing the results of tests on the 'aterial, which shall #e carried out in accordancewith the procedure descri#ed in S !!83.

9.%.3 T,i)g Wi!e

T0ing wire for 'ain reinforce'ent shall #e o.1) gauge B1.)'' dia'eter annealedsoft$iron t0ing wire, and o.18 gauge B1.2 '' dia'eter for lins and stirrups.

9.) PLANT

The concreting plant shall #e suita#le in t0pe, capacit0 and design for its purpose.The perfor'ance of the plant and its disposition shall #e to the satisfaction ofC+-T.

9./.1 Co)#!ete St!e)gt1 Re7ui!e0e)ts

The strength re6uire'ents for each grade of concrete proposed in the design shall #epro"en #0 'eans of preli'inar0 trial tests as specified later.

Grades of concrete shall #e in accordance with S %328.

The 'ini'u' ce'ent content of an0 structural concrete for superstructure shall #e3/( g?'3. The 'ini'u' ce'ent content for foundations and su#structures shall #e!(( g?'3.

The 'a5i'u' ce'ent content of an0 structural concrete shall #e !8( g?'3.

The 'a5i'u' free$water?ce'ent ratio shall #e (.!%.

The 'a5i'u' te'perature of the fresh concrete shall #e 3(C.

The 'ini'u' te'perature of the fresh concrete shall #e 9C.

32


33/92

SPECIFICATION

&i5 propositions shall #e calculated to gi"e the re6uired concrete strengths, using the'ethod descri#ed in Design of or'al Concrete &i5esH, pu#lished #0 the 7Depart'ent of the -n"iron'ent B1988 edition.

Due allowance 'ust #e 'ade for the free water contained on surface$wet orsaturated aggregates, as outlined in the a#o"e pu#lication.

here infor'ation is to #e pro"ided #0 the Contractor this shall #e su#'itted, ine"er0 case, at least 1! da0s #efore the start of concrete production.

4or designed 'i5es the following infor'ation shall #e pro"ided in addition to thatspecified in Clause 1! B1 and 1!B2 of S %328E$

a.

Data showing that the proposed 'i5 proportions and 'ethod of 'anufacture willproduce concrete of the re6uired 6ualit0 with the intended wora#ilit0, or

#.

Details of tests on trial 'i5es, or

c.

* state'ent that, for initial production where appro"ed #0 C+-T, theappropriate 'i5 proportions gi"en #0 Ta#les 1 and 2 in S. %328 will #e used.

The ContractorIs designs and drawings shall show clearl0 the characteristic strengths,'i5 proportions and de"iations proposed for each grade of concrete to #e use.

9./.2 Co)#!eti)g i) 1ot 2eat1e!$

n hot weather concreting should #e in accordance with *C Standard 3(%$// withthe following additional precautions #eing taen.

a.

&i5ing $ in hot weather suita#le 'eans shall #e pro"ided to shield the aggregatesstocpiles fro' the direct ra0s of the sun or to cool the aggregates #0 spra0ingwith water and to insulate the 'i5ing water tan and pipe lines to ensure that the

te0-e!atu!e o/ t1e 6at#1e+ #o)#!ete 21e) -la#e+ s1all )ot e5#ee+ :C.

#.

n hot dr0 weather suita#le 'eans shall #e pro"ided to a"oid pre'ature stiffeningof concrete placed in contact with hot dr0 surfaces. here necessar0 thesurfaces,including reinforce'ent, against which the concrete is to #e placed shall #e

shielded fro' the ra0s of the sun and shall #e spra0ed with water to pre"ente5cessi"e a#sorption #0 the surfaces of water fro' the fresh concrete.

c.

here"er possi#le all s'all pours should #e carried out as late as possi#le in theafternoon.Co)#!ete s1all )ot 6e -la#e+ 21e) t1e s1a+e ai! te0-e!atu!e e5#ee+s :+eg!ee Ce)tig!a+eo! t1e 2i)+ s-ee+ e5#ee+s t1e -e!0issi6le li0it o! 21e)t1e sa)+ sto!0 o##u!s.

9./.3 Co)#!ete (i5i)g$

33


34/92

SPECIFICATION

*ll concrete e5cept where specificall0 per'itted #0 C+-T in writing shall #esupplied #0 an appro"ed supplier of read0 'i5 concrete ha"ing a 'icroprocessorcontrolled #atching plant. The use of truc 'i5ed concrete shall not #e per'itted.

The concrete ingredients, classification and ti'e of addition of water to the 'i5 shall#e recorded on the deli"er0 ticet of each concrete #atch deli"ered to site.

n co'puting the 6uantit0 of water to #e added, due account 'ust #e taen of thewater contained in the aggregates. The a'ount of water shall #e sufficient to ensurethorough h0dration, good wora#ilit0 and high strength.

The Contractor shall tae all precautions to the satisfaction of C+-T to protectthe concrete fro' the inurious effects of the ele'ents.

* co"er or other suita#le 'eans shall #e pro"ided to shield the aggregate stocpilesfro' the direct ra0s of the sun or suita#le 'eans pro"ided to cool the aggregate #0spra0ing with fresh water and to insulate the 'i5ing water tan and pipe lines to

ensure that the te'perature of the concrete when deposited shall not e5ceed 3(

C.

9./.! Wo!3a6ilit,$

The Concrete shall #e of such consistenc0 that it can #e readil0 wored into thecorners and angles of the for'wor and around reinforce'ent without segregationof the 'aterials or #leeding of free water at the surface. ing ore5cessi"e dusting, and which shall not, in the opinion of C+-T, are inferior to thestandards laid down in later clauses in this section.

The wora#ilit0 of concrete deli"ered to site shall #e tested #0 slu'p test inaccordance to S 1881. The accepta#le slu'p shall generall0 #e /% 2% ''.

9./.% T!a)s-o!t a)+ Pla#i)g$

The concrete shall #e discharged fro' the 'i5er and transported to the wors #0'eans that shall #e appro"ed #0 C+-T and which shall pre"ent adulteration,segregation or loss of ingredients, and ensure that the concrete is of the re6uiredwora#ilit0 at the point and ti'e of placing.

The concrete shall #e placed in the position and se6uences indicated on the drawings,

in the Specification or as directed #0 C+-T within one hour of 'i5ing. hen thesite place'ent conditions re6uire a longer ti'e #etween 'i5ing and pouring, suita#leretarders 'a0 #e used, if appro"ed #0 C+-T.

-5cept where otherwise directed, concrete shall not #e placed unless C+-TIsrepresentati"e is present and has pre"iousl0 e5a'ined and appro"ed the positioning,fi5ing and condition of the reinforce'ent and of an0 other ite's to #e e'#edded, thecleanliness, align'ent and suita#ilit0 of the containing surfaces, and the ade6uac0 and

position of plant.

The concrete shall #e deposited as nearl0 as possi#le in its final position and in such a

3!


35/92

SPECIFICATION

'anner as to a"oid segregation, displace'ent of the reinforce'ent, for'wor orother e'#edded ite's. Placing shall #e continuous #etween specified or appro"edconstruction oints. ors shall #e #rought up to full thicness in !(( '' 'a5i'u'co'pacted la0ers as the wor proceeds.

here chutes are used to con"e0 the concrete, their slopes shall not #e such as tocause segregation and suita#le spouts or #affles shall #e pro"ided to o#"iatesegregation during discharge. Concrete shall not #e allowed to fall freel0 'ore than1.% 'eters e5cept with the appro"al of C+-T. here pneu'atic placers are usedthe "elocit0 of discharge shall #e regulated #0 suita#le #affles or hoppers wherenecessar0 to pre"ent segregation or da'age and distortion of the reinforce'ent,other e'#edded ite's and for'wor, caused #0 i'pact.

Concrete shall not #e placed in standing or running water unless so specified orappro"ed.

9./.) Co0-a#tio) o/ Co)#!ete$

The concrete shall #e full0 co'pacted throughout the full e5tent of the la0er. t shall#e thoroughl0 wored against the for'wor and around reinforce'ent and othere'#edded ite's, without displacing the'. Successi"e la0ers of the sa'e lift shall #ethoroughl0 wored together.

9././ Vi6!ato!s$

7nless otherwise directed #0 C+-T, appro"ed power dri"en "i#rators of thei''ersion t0pe shall #e used. The0 shall #e inserted at such distances apart orapplied in such a 'anner as shall ensure that the concrete is satisfactoril0 andunifor'l0 co'pacted.

The Contractor shall ensure that a sufficient nu'#er of "i#rators are on hand at allti'es including allowance for #readown of "i#rators. i#rators shall penetrate thefull depth of the la0er and where the underl0ing la0er is of fresh concrete, shall enterand re$"i#rate that la0er to ensure that successi"e la0ers are well nitted together.


36/92

SPECIFICATION

floor le"els. @aunches and colu'n capitals are to #e considered as part of andcontinuous with the floor or roof.

4loors$ :oints in the floor s0ste' are to #e located at or near the 6uarter points of thespan in sla#s and #ea's, e5cept where otherwise instructed.

alls $ ertical oints awa0 fro' corners. @ori>ontal oints a#o"e spla0s oropenings.

hene"er the placing of the concrete is discontinued other than at the e5posed faces,this discontinuit0 shall for' a construction oint. Construction oints are to #e 'adeonl0 along a hori>ontal or "ertical plane e5cept that in the case of inclined or cur"ed'e'#ers the0 shall #e at right angles to the principal a5is. Care shall #e taen to

pre"ent offsetting of the oint and to ensure water tightness. The oints shall in e"er0wa0 satisf0 the re6uire'ent of the -ngineer, and #e full0 detailed on drawings priorto su#'ission for appro"al.

hen wor is resu'ed adacent to a surface, which has set the whole surface, shall#e thoroughl0 roughened. t shall #e cleaned of all loose and foreign 'atter andlaitance and washed with water i''ediatel0 #efore placing the fresh concrete, whichshall #e well co'pacted against the oint.

9./.9 Co)st!u#tio) a,s$

The Contractor shall agree with C+-T, prior to the co''ence'ent of concreting,upon the se6uence of placing concrete and the positions of "ertical and hori>ontal

oints, whether shown or not on the drawings.

n general, sla#s in e5cess of ) 'eters in length and?or width and walls e5ceeding )'eters in length shall not #e poured in one operation and su#se6uent adacent #a0sshall not #e concreted within / da0s. The 'a5i'u' area of an0 pour shall #e 1((s6.'.

*s an alternati"e to alternate #a0 construction, shrinage gaps of up to 1 'etre inwidth 'a0 #e left at ) 'etre inter"alsF the shrinage gaps shall not #e concreted untilconcrete on all sides is at least se"en da0s old.

9./.1( Cu!i)g$(et1o+ state0e)t /o! #u!i)g s1all 6e su60itte+ /o! CLIENT a--!oal -!io! toa), #o)#!ete 2o!3.Co)#!ete s1all 6e -!ote#te+ +u!i)g t1e /i!st stage o/ 1a!+e)i)g /!o0 t1e1a!0/ul e//e#ts o/ su)s1i)e4 +!,i)g 2i)+s4 #ol+4 !ai) o! !u))i)g 2ate!. T1e-!ote#tio) s1all 6e a--lie+ as soo) as -!a#ti#a6le a/te! #o0-letio) o/ -la#i)g 6,t1e /ollo2i)g 0et1o+s4 as a--!oe+ 6, CLIENT. F!es1l, -la#e+ #o)#!etesu!/a#es s1all 6e #oe!e+ 2it1 -ol,t1e)e s1eet 2it1i)


37/92

SPECIFICATION

!e0ai) #oe!e+ /o! a /u!t1e! /ou! +a,s. Cu!i)g o/ #o)#!ete s1oul+ 6e#o00e)#e+ ;: 1ou!s a/te! -la#i)g t1e #o)#!ete o! as +i!e#te+ 6, t1e e)gi)ee!.All e5-ose+ su!/a#e o/ #o)#!ete s1all 6e #oe!e+ as s-e#i/ie+ a6oe a)+#o)ti)uousl, 3e-t 2et 2it1 -ota6le 2ate! as +i!e#te+ 6, t1e e)gi)ee!.

-5cept in the case of surfaces to which concrete has su#se6uentl0 to #e #onded, theconcrete 'a0 #e cured #0 the application of an appro"ed li6uid curing 'e'#ranesu#ect to the engineerIs appro"al. *pplication shall #e 'ade #0 low$pressure spra0in accordance with the 'anufacturerIs instructions.


38/92

SPECIFICATION

f it is proposed to use an ad'i5ture in the 'i5 then for each grade of concrete anadditional #atch shall #e 'ade with a dou#le dose of the additi"e. 4or each of these

#atches 3 cu#es shall #e 'ade and 1 tested at / da0s and 2 at 28 da0s to deter'inethe liel0 effect of errors in dispensing.

The trial design 'i5 proportions shall #e appro"ed if the a"erage strength of a set of9 cu#es tested at 28 da0s e5ceeds the specified characteristic co'pressi"e strength

#0 the current 'argin less 3.%?''2. The results of the se"en da0 cu#e tests shall #eused to gi"e an indication for future use of the strengths liel0 to #e achie"ed at 28da0s. The0 shall not #e used to satisf0 the 28 da0s preli'inar0 test cu#e strengthre6uire'ents.

The current 'argin for each particular t0pe of concrete 'i5 should #e deter'inedF it'a0 #e taen as ha"ing the s'aller of the "alues gi"en #0 B or Bii.

i 1.)! ti'es the standard de"iation of cu#e tests on at least 1(( separate#atches of concrete of nor'all0 si'ilar proportions of si'ilar 'aterials andproduced o"er a period not e5ceeding 12 'onths #0 the sa'e plant undersi'ilar super"ision, #ut not less than 1?) of the characteristic strength forconcrete of grade /, 1( or 1% or 3./%?''2for concrete of grade 2( ora#o"e.

ii 1.)! ti'es the standard de"iation of cu#e tests on at least !( separate #atchesof concrete of no'inall0 si'ilar proportions of si'ilar 'aterials and

produced o"er a period not less than % da0s #ut not e5ceeding ) 'onths #0the sa'e plant under si'ilar super"ision, #ut not less than 1?3 of thecharacteristic strength for concrete of grade /, 1( or 1%, or /.%?''2 forconcrete of grade 2( or a#o"e.

here there are insufficient data to satisf0 i or ii a#o"e, the 'argin for the initial'i5 design should #e taen as two $thirds of the concrete of grade 2( or a#o"e. This'argin should #e used as the current 'argin onl0 until sufficient data are a"aila#le tosatisf0 i or ii a#o"e. @owe"er, when the re6uired characteristic strengthapproaches the 'a5i'u' possi#le strength of concrete 'ade with a particularaggregate, a s'aller 'argin #ut not less than /.%?''2'a0 ha"e to #e per'itted forthe initial 'i5 design.

*t each age of test no cu#e strength shall fall #elow the appropriate 'ini'u'specified in the ContractorIs designs.

efore co''encing the ors the Contractor shall su#'it for C+-TIs appro"alfull details of the 'i5es he proposes to use, with their anticipated a"erage strength,which 'ust #e #ased on the satisfactor0 results of these preli'inar0 tests.

C+-T shall if he so desires #e present at all preli'inar0 tests.

The Contractor shall infor' C+-T of his intention to carr0 out such tests and theti'e and place of the tests at least 2! hours #efore the0 tae place.

either the 'i5 proportions nor the source of suppl0 of 'aterials shall #e altered

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without the prior appro"al of C+-T e5cept that the Contractor shall adust theproportions of the 'i5 as re6uired, to tae account of per'itted "ariations in the'aterials. Such appro"al shall #e su#ect to the e5ecution, to C+-TIs satisfaction,of trial 'i5 procedures set out herein.

9./.12 Wo!3s Test Cu6es$

4or the first 1( da0s that a particular grade of concrete is produced, or where there isa lapse of two wees or 'ore #etween successi"e pours of the sa'e grade ofconcrete, three sa'ples shall #e taen on each da0 and three cu#es shall #e 'adefro' each sa'ple. Two shall #e tested at / da0s and the other at 28 da0s.

*fter the initial 1( da0s, sa'ples of designed 'i5es shall #e taen at the reduced rategi"en in Ta#le 1 #elow, with the pro"ision that at least one sa'ple shall #e taen oneach da0 that concrete of that grade is used. Three cu#es shall #e 'ade fro' eachsa'ple, one #eing tested at / da0s and the re'aining two at 28 da0s.

Ta#le Sa'pling rates for design 'i5es after initial 1( da0s production run of concrete gradeB) Cu#es shall #e 'ade fro' each sa'ple

ate T0pe of Structure 1 Sa'ple to #e taen e"er0 da0 or e"er0E$

* Critical Structurese.g. &asts, cantile"ers, colu'ns

1( cu#ic 'etres

nter'ediate Structurese.g. ea's, sla#s

!( cu#ic 'etres

The cu#es shall #e 'ade, cured, stored and tested in co'pression in accordance withS.1881. The tests shall #e carried out in an i)+e-e)+e)t testing la#orator0appro"ed #0 C+-T. The la#orator0 'ust pro"ide e"idence that its e6uip'ent and

procedures co'pl0 with S.1)1( and S.1881 and that its testing 'achines areregularl0 checed and adusted for accurac0. 4ull details of the 6ualifications of allla#orator0 staff shall #e re6uired #0 C+-T.

eports of all tests 'ade shall #e supplied direct fro' the la#orator0 to C+-Twithin 2! hours of the cu#es #eing tested. C+-TIs epresentati"e on site shallha"e the authorit0 to stop all further concrete wor until accepta#le test results areforthco'ing.

ecords of Test Cu#es $ up to date records shall #e ept #0 the Contractor at thewors of all #atches of concrete, of their grade and of all test cu#es, cores or otherspeci'ens taen fro' the'. Copies of these records shall #e supplied to C+-T.

9./.13 C1a)ges i) (ate!ials o! (i5 P!o-o!tio)s$

either the 'i5 proportions nor the source of suppl0 of 'aterials shall #e alteredwithout the prior appro"al of C+-T, e5cept that the Contractor shall adust the

proportions of the 'i5 as re6uired, to tae account of per'itted "ariations in the'aterials. Such appro"al shall #e su#ect to the e5ecution, to C+-TIs satisfaction,

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of trial 'i5 procedures set out herein.

9./.1! Failu!e o/ Co)#!ete to (eet Test Re7ui!e0e)ts$

f the strength of the speci'en is less than the appropriate specified 'ini'u'crushing strength or if, in the opinion of C+-T, the concrete fails to 'eet thespecified re6uire'ents in other respects, the concrete in that part of the ors ofwhich it is a sa'ple shall #e considered not to co'pl0 with the specifiedre6uire'ents.

f the specified re6uire'ents ha"e not #een 'et, the Contractor shall tae suchre'edial action as 'a0 #e re6uired. efore proceeding with concreting, theContractor shall su#'it for C+-TIs appro"al details of the action proposed toensure that the concrete to #e place in the ors shall co'pl0 with the Specification.

9./.1% Co)#!ete Co!es$

*s and where directed #0 C+-T, c0lindrical core speci'ens shall #e cut fro' thehardened concrete in the ors for the purpose of e5a'ination and testing. Thecutting e6uip'ent and the 'ethod of doing the wor shall #e appro"ed #0 C+-T.Prior to preparation for testing, the speci'ens shall #e 'ade a"aila#le fore5a'ination #0 C+-T. Testing of the core shall #e in accordance with appro"edstandards.

9.8.1 Fo!02o!3$

4or's shall #e designed and so constructed that the concrete can #e properl0 placedand thoroughl0 co'pacted and that the hardened concrete shall confor' accuratel0to the re6uired shape, position and le"el, su#ect to the tolerance and standards offinish specified.

hen concrete is to #e "i#rated, special care shall #e taen to 'aintain the sta#ilit0of the for'wor and the tightness of the oints during "i#rating operations.

The 'aterial and position of an0 ties passing through the concrete shall #e appro"ed#0 C+-T. The whole or part of the tie shall #e capa#le of #eing re'o"ed so thatno part re'aining e'#edded in the concrete shall #e nearer the surface of theconcrete than the specified thicness of co"er to the reinforce'ent. *n0 holes leftafter the re'o"al of ties shall #e filled, unless directed #0 the -ngineer, with concreteor 'ortar of appro"ed co'position.

9.8.2 Re0oal o/ Fo!02o!3$

*ll for's shall #e re'o"ed without da'age to the concrete. The use of 'ould oil orother 'aterial to facilitate this shall #e su#ect to the appro"al of C+-T.

efore soffit for's and props are re'o"ed the concrete shall #e e5posed #0 re'o"alof the side for's or otherwise as re6uired #0 C+-T, in order to ensure that it hassufficientl0 hardened. The for's shall not #e struc until the concrete has reached acu#e strength of at least twice the stress to which the concrete 'a0 #e su#ect at the

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ti'e of striing. The for'wor to "ertical surfaces 'a0 #e re'o"ed after 2! hours

in nor'al weather conditions Bo"er 1%C.

*ll for' wor for pits, ducts and holding down #olt holes 'ust #e so constructedthat it can #e easil0 collapsed to facilitate withdrawal after the initial set of theconcrete.

The ContractorIs proposed 'ethod for the construction and fi5ing of the for'worfor #olt hole pocets shall #e su#'itted to C+-T for appro"al #eforeconstruction. The top of the shuttering shall #e suita#l0 co"ered to pre"ent entr0 ofe5cess grout, 'aterials used for curing etc.

Solid ti'#er 'ust not #e used for for'ing holding down #oltholes. olt holes for'ers 'a0 #e 'ade of pl0wood, e5panded 'etal, pol0st0rene or other 'ethod appro"ed #0 C+-T, who 'a0 re6uire the Contractor to carr0 out a test pour,

using the proposed #olt hole for'er.

(i)i0u0 -e!io+ 6e/o!e st!i3i)g Fo!02o!3

&ini'u' Period #efore SticingT,-e o/ Fo!02o!3

OPC SRCertical sides of #ea's, walls, colu'ns,lift not e5ceeding 1.2 ' 2! hours 3) hours

ertical sides of #ea's, walls, colu'ns,lift e5ceeding 1.2 ' 3) hours

)( hours

Soffit of 'ain sla#s and #ea's, Bpropsleft under / da0s 8 da0s

e'o"al of props $ #ea's and 'ainsla#s and other wor 18 da0s 19 da0s

9.9 TOLERANCES

The tolerances stated in the following Ta#le are for general use onl0 and specifictolerances for plant and si'ilar ite's if re6uired shall #e as directed #0 C+-T.

The tolerances stated shall appl0 to general surfaces and concrete sections onl0 andshall not appl0 to #uilt$in ite's of plant or openings for'ed to acco''odate theco'ponents of #uildings or plant. The Contractor shall #e responsi#le for ensuringthat the necessar0 clearances are 'aintained for all window and doorfra'es and otherco'ponents.

Per'issi#le tolerances gi"en in the Ta#le are the 'easure'ents #0 which the concreteis per'itted to e5ceed the stated di'ensions. egati"e tolerances are the'easure'ents #0 which the concrete can #e short of the stated di'ensions.Departure fro' align'ent is the per'issi#le de"iation fro' the centre line orhori>ontal or "ertical face or edge of the concrete.

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o reduction will #e per'itted in the co"er to reinforce'ent #ecause of a specifiednegati"e tolerance in a concrete section.

*#rupt changes of surface align'ent of concrete such as 'a0 occur at #adl0 'adeconstruction oints will not #e allowed e"en though the concrete surface are withinthe per'issi#le tolerances.

Pe!0issi6le Tole!a)#es i) Co)#!ete Di0e)sio)s

Co)st!u#tio) Tole!a)#es

Departure fro' align'ent in oads K13 '' $ 13''

Top surfaces of oads K ) '' $ ) ''

Concrete in 4oundations against which #acfill isplaced

K 2% '' $ % ''

Departure fro' align'ent of 4ootings, alls,ea's, Colu'ns and other si'ilar ite's

K % '' $ ( ''

Cross sectional di'ensions of 4ootings, walls,#ea's, colu'ns and other si'ilar ite's.

K ! '' $ % ''

Top surfaces of sla#s prepared to recei"e screed K % '' $ % ''

Centres of pocets or holes with greatest lateraldi'ensions not e5ceeding 1%( ''

K % '' $ % ''

Centres of pocets or holes with greatest lateraldi'ensions e5ceeding 1%( ''

K 1( '' $ 1( ''

9.1( PRE-CAST CONCRETE SLABS AND MEMBERS

Pre$cast concrete sla#s and 'e'#ers shall #e used in the wors where specified in thedrawing or directed #0 C+-T.Pre$cast sla#s #e designed and constructed in accordance with S 811( Part andS %89).*ll designs with shop drawing and 'ethod state'ent to #e su#'itted for C+-TIsappro"al prior to construction.T1e #o)#!ete 0i5 +esig) s1all #o0-l, 2it1 !elea)t S #o+e !e7ui!e0e)ts a)+t1e total C1lo!i+e #o)te)t o/ t1e 0i5 s1all )ot e5#ee+ :.;@ 6, 2eig1t o/ t1e#e0e)t i) t1e 0i5.The concreting of each pre$cast sla# or 'e'#er shall #e co'pleted in one continuousoperation and no interruption will #e per'itted.The 'oulded concrete surface should #e unifor' without hone0co'#ing or air

#u##les. Densit0 test of concrete as directed #0 C+-T to #e carried out at an0stage of construction if the 'i5 is found unsatisfactor0. o repair is allowed on the

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'oulded concrete surface for the a#o"e defects. Concrete 'i5 design to #e re"isedtill a unifor' surface is o#tained.

Pre$cast concrete sla#s or 'e'#ers shall not #e distur#ed or lifted until the 'ini'u'specified period for the sa'e as per the S Code ha"e elapsed.

o stress to #e applied to the concrete till the 'ini'u' specified #ond strength andco'pressi"e strength is achie"ed.+ifting shall #e carried out as per the appro"ed drawing or as directed #0 C+-Twithout shoc or "i#ration.Slings or purpose 'ade cla'ps #oth with soft wood pacing shall #e used for liftingin order to pre"ent da'age to the sla# or 'e'#er.

o ph0sical da'ages, patchwor, cracs or lateral strains should #e "isi#le when thesla# is deli"ered at site.*ll necessar0 test to #e carried out as per S 1881 as directed #0 C+-T. Sla#sshall #e erected and le"elled as per the appro"ed 'ethod state'ent.*ppro"ed non$shrin grout to #e used for the grouting #etween the sla#s andsupporting #ea's.&onolithic concrete, reinforced with C 'esh to #e done o"er the sla# once thesla# is le"elled and grouted.The sla# should #e co'pati#le to the water proofing s0ste'. Considera#le "i#rationshouldnIt #e felt when specified li"e load is o"er the sla#.


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Concrete top surfaces, which are to #e co"ered with a screeded #ed of granolithic orsi'ilar flooring, shall #e ta'ped and struc off to the re6uired le"el. The0 shall #e

#rushed with a stiff #roo' ust #efore the concrete hardens so as to re'o"e alllaitance and to roughen the surface. *lternati"el0, the #ase concrete 'a0 #escra##led and wetted i''ediatel0 prior to la0ing the screed.

9.13 FIXINGS AND CAVITIES

o holes, ca"ities of fi5ings shall #e pro"ided in an0 concrete wor e5cept whereshown on the drawings or appro"ed #0 C+-T.

here holes, pocets, threaded inserts, #olts or other fi5ings are specified, descri#edor directed the0 shall #e pro"ided in the concrete or reinforced concrete during thewor of concreting.

@oles and pocets for holding down #olts, threaded inserts and cast$in #olts forelectrical e6uip'ent shall #e set with a tolerance not e5ceeding plus or 'inus ).% ''unless otherwise descri#ed or directed. The threads of all #olts and inserts shall #eept clean and shall #e protected against da'age.

*ll holes and pocets shall #e stripped clean and per'anent liners and for'ers shallnot #e used.

Threaded inserts and cast$in #olts shall #e fi5ed s6uare to the for'wor #0 ate'porar0 #olt and the concrete within !( '' of the' shall #e hea"il0 painted with

#itu'astic. *ll threads shall #e left well greased on co'pletion of the wor.Threaded inserts shall #e electro$gal"anised 'allea#le iron or 'ild steel.

9.1! BLINDING:

The ground under reinforced concrete foundations shall #e #linded with a %( ''thicness of Concrete of appro"ed 'i5 design. aterproof

Civil and Building Works Specifications

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