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“Knowledge is such a treasure which cannot be stolen”

“Invent a New India Using Knowledge”

है”ह”ह

IS 10505 (1983): Code of practice for construction offloors and roofs using precast concrete waffle units [CED51: Planning, Housing and pre-fabricated construction]

Indian Standard

Reaffirmed 2008

CODE OF PRACTICE FORCONSTRUCTION OF FLOORS AND ROOFS

USING PRECAST CONCRETE WAFFLE UNITS

(First Reprint SEPTEMBER 1993)

UDC 69.024/·025 691 ·327 : 006·76

© Copyritght 1983

BUREAU OF INDIAN STANDARDSMANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG

NEW DELHI 110002

Gr 3 May 1983

IS : 10505 - 1983

IS 10505· 1983

Indian StandardCODE OF PRACTICE FOR

CONSTRUCTION 0[-1' FLOORS ANI) ROOFSUSING PRECAST CONCRETE WAFFLE UNITS

PreJ~lbri('ated and Com posit« Construct ionSect ional (~()n)mit lee, BIJe: ~~~

Chairman

SHIU A. RAMAKHISItNA

RrjJrl'Sl'flting

Lng iuccr ing Coustruvt iou Cor poru t ion Ltd, Ma dras

Stn.l(lural EIl~in('('rjl1(~ Rt'~I(',ll'ch Cr-nt r« (Cst H, ),I\ladras

Member s

SUit] s. ~UnH.AMANIA~ ( Alternate to

Shri A. Ramakr-ishna )I)It N. S. BII:\L Structural Enginp('riug Researrh C.'ntH·. Roork-:«

S.HnI K. C. ~:\ITHA'\l1 (Allunale)SIfHl A.JYA BnAH\p\\,,\,1 In pe-rsona l capacity ( 'lOl, (;u({ Linl:s . ,Veil' )('11,; )

SHit I D A 1\ S Ii:\ BJI :\ H :\ I •W A ,I ( AIIaliaIe)SHill S. C. ell ,,,ll·\Hi\HTI Central Hililding Rt'span It l nvt it ut e , RoorkecSURI B. K. CIl'\J\HABOH'l Y lIuusing a n.] Urban lJe vr-lop nu-nt Curporation,

New l Jr-Ihi(;~lInJllon India Lim iu-d , Boruha vSHHJ A. K. CHATTEH.n:I':

Su x r A. C. Roy ( .:tlternat« )CUIFF AI{('ltl'l'l'(''l' t>ntral Pllhlic \t\,(irk~ l)r'partIJlt'Tlt, I\pw Dt'lhi

Sl',NIOH AltClilTEC'T ( 1~&'I'P ) ( Alternatc )Duu x Tent (C & ~lOU ) Central \V~Lter C()rnrlli~~i()lI, :\'pw l>plhi

!>";PUTY J)1I{FCTOIt (C&MDI» (.,I!ter"aft')SJlHI A. (;II()~HAr. In f)('r'\onal rapac itv ( C/o .\1/.\ St"I' Consultants Ltd,

J:! /)/11 £.;/Z Hoad, (.'o!, utta )ST\~P\H}lS 1{."\(·;\I'ch.' I>c..,ign, and Standard" ()Igallil,ation,

( J\1illj·,try of Ru ilwa ys ), LucknowJc)1.~T J)lIl1':<,TOll

( B&S ) CBl rv J) I H J<CTOH S'l'.\ ~ 1)\ It liS

( H&S ) CB ( Alternate )D H A. C. I\1A I ) II :\ V A H.. t\ « •

S It It I (;. A~ ~ '.'\f \ L \ 1 ( .1/ternaIf)SHirl (;. K. i\lA.1I';\11l.\1t Ilindu..,tan Prefab Lim ir rd , :'\t'w flplhi

SHltl !\1. Kl':'lill' ( .1lff'lfltJlf)SHRI P. V. N UK ll ind usr a n Constru ct ion Co Ltd, Bombav

SHHI A. C. :\,\HW.'KI (.'Illernalt) ,DIt 1\'1. 1\.\y.\1-.: 'rile Concrete Assoc iat ion of India, Bomhay

S II HIP. S,: J~ 1v A ..._\!\f ( Al ternatc )

( Continuedon page 2 )

(~) Co!?yrzehl )983

BUREAU (>I" INI)IAN STANDARI)Sl'hi, p uhl icat ion i~ pr ot ecred under the Indian CO,~'1ra~ht •.jet ( X IV of 1951) aDdr eproduct ion In whole or in part by any means except with written permisaion of thepublisher ahall be deemed to be aD infringement of copyright under the said Act.

ludiau l nst it u tv (If '1'.-'( IIIIlllc\gy. Horllha~'

C,'ntral Road H.('~'';lrdl J n-t i t u tc, Nf'\V Delh i

IS : 10505 • ~983

. \ 101111(''',\ R,"jlrt'Jtlllin;c

1)1~ V. P.\I(,\~t.\SlV":\t Indian Institute of Terlmologv, MadrasSItHI B. C. PATI':I, r"l/s ?\1. N. Dast ur & (~n Pv r Ltrl , CalcuttaSHItl SJlIHISlI B. PATEL Shirish Pa u-I & A\s~o(ialC.s, HOlnbay

SIIBI P. II. SHINl\'.\S.\Cll.:\H (Alternllte.)Dlt N. R \1: II \\'I·:'\"ltlt.\ CPJlU'nl Rc-s('"n h l n-t itute of l nd ia . ~f'\\' Delh i

S II I: I I r. K. .J l L":\ ( .-1//, t ua tr )PHOV ( '. I'.. R \ \11,:;',; It

S II t: I P. It \ \' ( : II n \\' It JJ I( Y

SH:~I .v. h.. (;AIU; ( .f/to/ltlll)R.EPH l-:~I ~T.\'IIYI: Ministry of !)I·ft'nrp, En~inC'pr·jn-Chi~f·sBranch

LT-C .. r. .\. C. ~1C) 11.\ S ( Alternate )SH10 P. V. S II \ It Shah Construction Co Ltd, BombaySu u r K. S. S': I.:"I\':\S.\N" National Buildings Organizat ion, New Delhi

S H H.I S 11N JL B 1-:n v ( ALia1111it )1)1( R. C. So!')",.\]. The Institution of Engineers ( India), CalcuttaSHin }-1. 0J. Sl:l\li-\ R...o\o l l industan Stoclworks Con,trllclion Ltd, Calnltla

S It HIS. !':. .\ ,H II K :\ H J ( Al ternaI r' )

SHltl ~1. C. T.\~P·'N STUP Consultants Ltd, BombaySIUll K. VEI·:H..\IL\(~H.\YA('Jl\BY Bhara t Heavy Llcr tr icu ls Ltd, RanipetSHRI G. V I·;;\"K .\TEsUl.U ~1illi'\lry of Shipping and Transport, New Delhi

SHHI s. Sl<~ETJL.o\H.Al\l ( Allf"late)SHIH G. ItA)I.-\N, Director General, lSI ( Ex~offi.i() Membc. )

Dirvctor ( C\V Engg )

Secretary

SHUT 1\. K. i\\',\S'I'HY

Assist.rnr Director ( Civ Engg), rs:

The Prcfnbr icat inn System Su1->C0I11111 it ir-e, Bl)C~ :')2

Convener

SHIU G. K. !\IAJt .'lJ>,\ll

.'[fn/bus

SH n t ~1. Kl.-~Il'-; ( Alternate toSh r i (;. K. !\1a j \l ITldar )

S uat P. S. A;\{ urx i: Ci t v and I "dust ria I r)('\'p]npTnellt Cl\rpnrat ion ol~lLlhar.l~htra Ltd, HIIll) ha y

S HH I RoO ~L DESHP.l,XPE ( .iu»,naif. )SHill Arv ..\ BH ..\ /( ,-\1)"· A.l In personal capacity ( 207, Golf Links, Nno Delhi)SHin S. ~. CHA~J)A .Metallurgical & Eng ineer ing Con-u ltants (India)

Ltd, RanchiSHiH S. P.-\StTl~A"HY ( Alternate )

SHR1 N. K. GtrpT,o\ Engineers India Limited, New Delh!S~Utl P. C . .J A1S Ministry of Defence, Eng incer-in-Chit-L's Branch

SHUl DISf.::-\H Sf" :\~J) ( Alternate )

( Cou! inur.t! on IJapJ 10)

2

Al~ENO~[NT NO. 1 MARCH 1986

TO15:10505-1983 CODE OF PRACTICE FOR CONSTRUCTION OF

FLOORS AND ROOFS USING PRECAST CONCRETE WAFFLE UNITS

(Page 5, clause 4.4) - Add the following sentenceat the end of the clause:

'Guidelines for design of floors/roofs using waffleunits is given at Appendix B.f

(Page 9" Appendix A) - Add the following newAppendix B after A-2.1:

APPENDIX B(Clause 4.4)

GUIDELINES FOn DESIGN OF FLOORS/ROOFSUSING WAFFLE UNITS

B-1. LOADS AND FORCES

B-l.l Loads and forces shall be taken in accordancewith clause 17 of Is:456-1978*. In addition, slabshould be checked for incidental concentrated loadwhich is likely to occur during the construction.

B-2. ANALYSIS OF FLOORS/ROOFS

B-2.1 The floor/roor with waffle units up to a span of6 metres having ribs of width not less than 100 mm

~ (excluding thickness of precast vaffle ribs) spacedat not more than ,50 mm may be analysed as solid slabspanning in two directions at right angles in accordanwith 23.4 of 18:456-1918* or as flat slab in accordancwith 30 of 18:456-1978*.

·Code of p ract Ice- for plain and reinforced concr e(third revie ion) • -

1

B-2 .;~ 'I'I.c fLoo r Zr oo f \oJILh wurrlc un i Ln hnv i ng !;pnn ofuor e than G In and n rib spacing of more thalJ 150 111111

S ha.l l, be designed as slab and grid beam syst em. 'I'heshear at the interface of precast and in-s'ltu concreteshn L]. he cnlc ul.at: ed and su i t a bl. e shear keys/ shearr c illfo.~~~"e nt . G})ull b e rJro~ ided. t a avo ill sepurnt, ion. a ..

NOTE - When the s pan of waffle unit is more t hn n'( ~) 0 II0u, t 11 e G L1'" U c t ur n 1 <1 c ~) i gil 0 f t 11 e U III L s 11o u1 db c nud c •

B-3. COrrrROL OF DEFLl£TION

B-3.1 If·the syst em is a nu Ly s ed as per ll-2.1, thedeflection shall be restricted in accordance with 23 ofIS:hj6-1970* and the depth of rib of the unit shall beconsidered us depth of s.l n l»,

13-3.2 If the system is unn Ly s od ClS per B-2.2, thedeflection should be restricted ill o.ccordnnce with22.1, 22.2 lind ?3 of IS:lt56-1970*.

B-4. DErJ\ILIHG OF nEINFOnCEME1~T

B_l~.l Shear stress in t he ribs shall be caLc u.LuLu d ns

per IS: 145 6-19rr8*.

n-l~.2 Detailing of the r e i nf'o r c emcrrt shall be do n ein uccordo.nc e \01 it h c Ln uu e 25 of If;: 1, jG-19'lBK •

*Code of practice for plain and reil~orced concrete( tJl i.rd reui:e iOll) •

(lJOC 32)

2

___~ .. n:-.~nror,raphy Unit, lSI, New Delhi. India

IS : 10505 • 1983

Indian StandardCODE OF PRACTICE FOR

CONSTRUCTION OF FLOORS AND ROOFSUSING PRECAST CONCRETE WAFFLE UNITS

o. FOR E W 0 }{ D

0.1 This Indian Standard was adopted by the Indian StandardsInstitution on 28 February 1983, after the draft finalized by the Prefab­ricated and Composite Construction Sectional Committee had beenapproved by the Civil Engineering Division Council.

0.2 The scheme consists of a nominally reinforced precast open box typeconcrete units called waffle units laid in a grid pattern and cast-in-situconcrete in the joints between the units with the reinforcement provdedin the joints. Minimuru thickness of top screed is provided dependingupon structural and functional requiretnents. The finished slab has apleasant grid pattern in the ceiling. '[he scheme is suitable forroofs/floors spanning in two directions.

1. SCOPE

1.1 'l'his standard r ovr-r s t he det a ils of construction or floors and roofsllsing precast concrete waffle units.

2. DETAILS OF THE SCHEME

2.1 Precast Unit

2.1.1 Shape -- 'The units are of the shape of an inverted trough, square,rectangular, triangular or any other shape. The ribs of the units may begiven an outwar-d slope to enable the precast components to dernouldeasily and also to enable them to act monolithically with cast-in ..situbeams in joints bel ween the units.

Typical details of cross-section of square waflle slab unit and cross­section of Hoor/roof using waffle units are shown in Fig. 1 and 2respectively. .

IS : 10505 • 1983

NUT EMBEDDEDIN UNIT

· •.• t .. ' ...•.. o •••• ' •• ~' •••

• • " •• , 0 • 0 ·0 •• • ••• o. .f •.

FIG. r-rVPICAL ~Q.UARE WAFFLE SLAB UNIT

CAST IN SITU CONCRETE

.•..• : __ .0 •

• ''lI. ..":'.

REINFORCEMENTIN JOINTS

TOP SCREED

WAFFLE UNIT

FlO. 2 TYPICAL SECTION OF FLOOR USING WAFFLE UNITS

4

IS: 10505 • 1983

2.1.2 Size - The lateral dimensions of the units should be modular( see IS : 6820-1972*). The depth of the unit shall be as per structuraldesign and will vary according to loads and spans. The minimumthickness of the flange and web of the units shall be 25 mm,

3. MATERIALS

3.1 General - 'I'he mau-rial used for the construction shall conform toIS . 456-1978t.

4. STRUCTURAL DESIGN

4.1 The grid slab shall be a nalysr.d hy any of the accepted methods ofanalysis.

4.2 The precast units shall Have adequate strength and stability inaccordance with relevant code of prac.tice ( IS : 456-1978t ) during thofollowing stages:

a) Dcmoulding;

b) J-Iandling, stacking, transporting and placing; and

c) Witl: all design loads together with dead load of in-situ concretein joints.

NOTF: - "'here portland pozzolana cement is used delayed strength developmentat the early ages shall be considered.

4.3 Loads shall be in accordance wit li IS : 875-1q64~.

4.4 For ca lcu lat i nu the limit state of collapse at the critical cross sections,at stage of de moulding and handling, a load factor of at least 1·5 shallbe applied for calculating the design limit state of collapse load.

5. MOULD

5.1 The mould used for manufact u ring waffle slabs normally consists oftwo parts (a) bottom 1110uld and (b) side moulds, The bottom mouldcan be made out of tirn her , masonry, concrete, steel FltP, plastic or anyother material acceptable to engineer-ill-charge. The side moulds simi­larly can be tirnber , steel, I~RP or plastic. When using masonry orconcrete moulds, the top surface shall be finished to the required accu­racy and made smooth.

In case of masonry moulds, the use of chicken mesh or fibrereinforcement in the top surface vv ill help in making the mould lastlonger for higher efficiency. Adrnixt ures for higher strength of concretecan also he used.

*ltecorllrncndalions fur modular co-ordination rules for (nodular planning.tCode of practice for plain and re inforced concrete ( third revision ).t( :(Id., of practice for structural c.;afl"ty of buildings: Loading standards (first rlvisiun ).

5

IS : 10505 - 1983

6. REINFORCEMENT IN PRECAST UNIT

6.1 Reinforcement shall be provided according to the structural require­ments. Any mesh type of reinforcement/welded meshjexpandedmetaljchicken mesh with a maximum spacing of 100 rom both ways shallbe provided.

7. CONCRETE

7.1 Mix - The concrete mix shall be of minimum grade M 20 as perIS: 4:)f)-1978*.

8. CASTING AND CURING

8.1 Mechanical vibration either through mould/table vibrators or screedvibrator is essential to ensure good compaction. Needle vibrators can beused for compacting concrete in the ribs and screed vibrators can beused for corn pacting concrete in the flange. For larger factories, concreteplacing machine which level, vibrate and finish the concrete units can bead vantageously utilized.

8.2 Curing shall be done according to IS : 456-1978*. I f necessary, lowpressure steam curing may be provided to get early stripping/releasestrength.

9. TOLERANCES

9.1 Tolerances on the dimensions shall be as follows:

a) Length/breadth - ± 5 mm or ± 0·1 percent whichever isgreater, and

b) Thickness _..- ± 21nnl.

10. SAMPLING AND TESTING OF UNITS

10.1 Sampling - Sacnpling shall be done 10 accordance withAppendix A.

10.2 I ..oad test on Aoor/roof shall be car rind out in accordance wit h theprovisions of IS : 456- 1978*.

11. TRANSPORTATION AND ERECTION OF PRECASTELEMENTS

11.1 Lifting Hooks - Wherever lifting hooks/holes are used these shallbe provided at structurally ad va ntageous points to facilitate dernouldingand erection of the P' ecast unit. The lifting hooks can be formed out of

·Codc o( practice for plain and reinforced concrete ( third recision ).

6

IS : 10505 • 1983

normal mild steel reinforcing bars with adequate carrying capacity tocarry the self "'eight during dClllollJding, handling and el crtiou , ~\flt\"

erection, the hooks can he either cut or bent dO\\'11 ins ide the SC1('(~d urjoint concrete that will be laid subsr-qucnt ly.

11.2 Stacking of Units - After removal fro 111 moulrls the precastunits shall be stacked o ver support pI:HTd at about l,'f) of span Irorn ends.Care shall be t akr n to set' t h a t no su p poir is JlLH ed at lite centre of spau.

11.3 Transportation .... - For t r.iuspo: ling and prectiug t lu: units, ropesl ings sha II he t it'd near the vru is at 1;:') or tit. \ len '-'1 til fl'OIH pi t lre r end ofthe unit. III case' the units are t ra ns portcr] in trolleys, the overhung ofthe units from the trolley shall not be mon- than lr~) 01 lenuth. Th« unitsshall be lifted m.muul ly or w ith tit.' ht'lp of rha iu }lullc'y hlorks ormechanically with a hoist or a crane.

11.4 The units shall lH~ pl.tct·d and aligned side hy side across. the spanto bp covered. Placing or units shall b(\ -t a it ....·d from one end of thebuilding.

12. CURING OF IN-SITU CONCRETE IN JOINTS

12.1 The in-situ concrete in t he joint <hull he cu rer] for at least 7 davsin accordance with IS : 456-1978*. 'l'llt~ concrete shall be t he-n allo\v~dto dry for at ]~a'it a \\'(·('k. ..\ coat of cement slurry may be app licd tothe joints to fill the hairline cracks that IIlight have dp\,(,]opf'd.

13. FIXTURES

13.1 Designers shall indicate provisions for fixtures like fanhnoks!insert~!

electric. conduits, etc, to he iucorpora tcd within the precast units or thein-situ joint.;;/screed co ncrr-te.

13.1.1 Incas c 0 r co n ce a led \vir in g, con d II its 1nay be pIa ce d \\'i t hi nthejoints along the Jengt 11 or within the "creed before concrr-tiug. I f adequatethickness is av ailahle this 111ay hf' concealed within tIH~ floor/roofs finish.

13.1.2 Holes, openings and fixtures required to be provided within theprecast units shall be fixed accurately wit h adequate embedment at theprecasting stage. Drillirig of holes/cutting of edges shall not be madeotherwise pcrruit ted by the I~ngineer-in-(~harg(\.

14. FLOOR FINISH

14.1 In case of floor slab, the floor finish shall h« done in accordancewith relevant Indian Standard Code of practice.

·Code of practice for plain and reinforced concrete ( third recision ).

7

IS : 10505 - 1983

14.2 To provide adequate resistance against irnpact/aco\J~tic treatmentthe floor thickness at any place shall not be less than 75 HUll.

15. ROOF TREATMENT

15.1 Adequate water proofing and thermal insulation to suit localclimatic conditions shall be adopted in accordance with relevant IndianStandard Corle of practice,

APPENDIX A( G'[ f:l UJ e )O. 1 )

SAMPLING PROCEDURE FOR PRECAST SLAB UNITS

A-I. LOT

A-I.I All the precast slab units of the same size, manufactured frorn thesame material under si m i la r conditions of production sh all be groupedtogether to constitute a lot.

A-l.2 The number of units to he selected from each lot fo dimensionalrequirements shall depend upon the size of the lot and shall be inaccordance with col I and 2 of 1'able 1.

TABLE I SAMPLF: SIZE AND REJECTION NUl\.BER( Clauses A·l.2 and A-2.1 )

LOT SIZi: FIRST SAMPLE SJ<TOND FIHST SI'Tn~"n

SIZE SA\lPLE SIZE RF..'JoTTION H F.11'TTIOS

NtT~Rfo~ll ~l'~llJElt

(1) (2) (3: (4) (5)

Up to 100 5 ~ 2 1

101 to 300 8 B 2 '2

301 to 500 ]3 13 2 2

501 and above 20 20 3 4

A-l.2.1 The units shall be selected from the lot at random. In orderto ensure the randomness of selection, procedure given in IS : 4905-1968*may be followed.

-Methods for random sampling,

8

IS : 10505 • 1983

A-2. NUMBER OF TESTS AND CRITERIA FOR CONFORMITY

A-2.1 All the slab units selected at random in accordance with col Iand 2 of Table 1 shall be subjected to the dimensional requirements. Aunit failing to satisfy any of the dimensional requirements shall betermed as defective. 'I'he lot shall be considered as conforming to thedimensional requirements if 110 defective is found in the sample, andshall be rejected if the number of defect ives is gn~ater than or equal tothe first rejection number. If the number of defectives is less than thefirst rejection number, the second sample or tho s.uue size as taken in thefirst stage shall be selects J from the lot at random and subjected to thedimensional requircmen: s. The number of defectives ill the first sampleand the second samplr. shall be combined and if the combined numberof defectives is less than the second rejection number, rhe lot shall beconsidered as conforming to the dimensional requirements; otherwisenot.

9

IS : 10505 - 1983

( Continued (rom page 2 )

Members

SHin M \ IlENDltA RAfT

SHLU M. P. .T \1 SIN'.;H

S JJ n J N. N. BJI I ~ I': ( . f/ IernaIe)S H'tI G. ~1. ~'L\ N U " L I A

S 11tH S. N A JL\ Ito \"

Representing

Engineering Consulr ants ( India), Np\v n-n.tCentral Budding Ri-search Institute, Roorkve

Indian Institute or Architects. nOJnhayEngin('~rlng Uonstruct ion ( lorporat ion Limited,

!\lad rasSHIO G. B. Srxu H ( Alternate I )SHIU S. SI.;nIL\;\I.\~L\N( Alternate I I )

SHIn A. N.\~PY Civengers Entt'rpl'i!'t(~ Pvt Ltd. New DelhiSHRt B. V. B. P A ( "rile Concrete As~()( iat ion of l nd ia , Bombay

SHill P. Sit I~IV .\~.\N ( Alternate)Du N. R \(lll ~VI·.~UU.A Cement Rpsearch Institute of India, New Delhi

SHin ir. K. JULK A ( Alternate)SURf S. RAY Bridge and Roof Co ( India) Ltd, Calcutta

Strut AltUP KUMAR DUT'fA ( Alternate )SHRI L. H.. S.-\STIU Tamil Nadu Police Housing Corporation Ltd,

MadrasSn ur P. CIIELIJ,\M ( Alternate)

SHIH P. V. SU.\j[ Shah Construction Companv, BornhaySHIU B. G·. SHIH'n:Ji~ 1\1/,.; B. G. Shirke and Co, Pune

SUIt,r I). V. ,,"tTLI\ ,\nSf ( Alternate I )SHIH n. 'f. PA\V/\Il ( Alternate II )

SURl K. S. SH.INI\'ASA~ . National Building..; Organizat ion, New DelhiSuny SITS] L llJ'~HY ( Alternate )

SURVEYOH. (,10' \\'OH}{S V Central Puhl ic Works Department, New DelhiSHIn R.. K. SU.s'L>.\ltAM ( Alternate )

SURT K. V":I':It,\It,\OJI:\V.\f-'HAltY Bharat Heavy Electr icals Ltd, RanipctSHRI V. !\1.\ LV I Y A ( Alternate)

SHRY ZACHAHlA (;EOLtOE Structural Engineering Research Centre, MadrasDn A. G. i\l.\uHAVA RAO (Alternat6 )

10

BUREAU OF INDIAN STANDARDS

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Inlp_etlan OffictJs (With Sal. Point) :

Pushpanjali. First Floor, 206-A West High Coun Roed.Shankar Nagar Square, NAGPUR 440010

Institution of Engineers (India) Building. 1332 Shiv.;; Nlga,.PUNE 411006

·Sale. OfficeCalcutta is at 5 Chowringh88 Approach.P. O. Princep Street, CALCUTTA

t Sales Office i. at Novelty Chambers. Grant Road, BOMBAV

: Sal•• Office i. It Unity Building. Ner81imharaje Square.BANGALORf

re/ephon.1331 01 31l3311376

378882

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26348394966

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4038 2721 01 41

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20 1083

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Printed It D•• Kay Printer•. New Oelhi. Indl.