Disclosure to Promote the Right To Information

Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public.

इंटरनेट मानक

“!ान $ एक न' भारत का +नम-ण”Satyanarayan Gangaram Pitroda

“Invent a New India Using Knowledge”

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“Step Out From the Old to the New”

“जान1 का अ+धकार, जी1 का अ+धकार”Mazdoor Kisan Shakti Sangathan

“The Right to Information, The Right to Live”

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“Knowledge is such a treasure which cannot be stolen”

“Invent a New India Using Knowledge”

है”ह”ह

IS 2090 (1983): high tensile steel bars used in prestressedconcrete [CED 54: Concrete Reinforcement]

Gr 3

IS : 2090 - 1983

Indian Standard (Reaffirmed2009)

SPECIFICATION FORHIGH TENSILE STEEL BARS USED IN

PRESTRESSED CONCRETE

(First Revision)

Second Reprint SEPTEMBER 1993

UDC 669.14.018.295-422:666.982.4

Copyright 1983

BUREAU OF INDIAN STANDARDSMANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG

NEW DELHI ll0002

May 1983

R'I"",ntin.Cftltr.l lPublic Works Department

18,2_-1_(Reamaa. 1"')

Indian StandardSPECIFICATION FOR

HIGH TENSILE STEEL BARS USED INPRESTRESSED CONCRETE

(First Revision)

Joint Sectional Committee Cor Concrete Reinforcement, BSMDC 8

C.i''''tllISIl1&1 G. S. RAO

M""bn,SWRRIM1'lUIDJNO EMOIJlR....

( CD(l ) ( All",.." toSllIn G. S. RAO )

naJ. L. A.JMAIfI The Tata Iron It St~1 Co Ltd, Jamahedpur~Htn A. ~. MITRA ( All"".,.) ,

D., A'III. KUMAR Cement Research Institute of Indi., New DelhiSURI E. T. ANTIA The Concrete Auociation of India, Bombay

SHRI P. SRINIVAIAB ( AI,,,,,.,,)SRRI S. DAMxaJJ:K Steel Re-Rollift' Mills Association of India, CalcuttaSUR. S. N. CIIAMDA Metall\\rl_ical and Enlineerinl Consultantt ( JDdia )

ttd, RancbiSR.J R. D. Cxo17DH.'BY ( ~11muI" ) •

CHI." ElfOJ1fJCBB ( D " R ) Irrilation Department, Covernmfut of Punjab,Chandilarh

DIRBCTOB ( CD) ( AI,,,,..,. )D..UTY Dta_croft, STAJIIDA1\D8 R.~...roh, Desips & Standards Organilation

( D .. S )-1 (Ministry or Railway.), LucknowAalll-rAK-r Dm.ceroR, STAH-n~.D" (BitS )-11 ( AI,,,,.,,, )

Sa.1 D. I. naAJ Gammon India Ltd, BombaySRRI A. L. BHATIA ( AI,,,,,.,, )

S01 M. a. DOC'I'o. Special Steel. Ltd, BombaySRal S. O. J08HI ( All".." )

SHill ZACBABIA 01lORO. Structural En.ineerlnl Research CeDtre (eSIR).Madru

S.al G. V. SVBYAXV_AB ( AI,,,,..,,)SaRI V. K. GRA1lfIIXd Structural EDlineerins Research Centre (CSIR.»)

Roorkee8••1 D. S. '.AKA'. RAO ( AI,,,,.,,,,)

( eM';"_.11 1M,. 2 )

e e:.".,n,.. 1989BUllEAU OF INDIAN STANDARDS

IThil publication it prot_eel under the Ifllli.. Co/rWi.', .Ad (XIV of 1957 landrepraduction In whole or iD part by anv means ~xcept with written permi.ion or thepublisher _II be deemed to be In Infringement of copyright under t he said Ac"t.

Mild",SHal V. GULATIS8RI P. K. Guns

IS I 2090 • 1983

(eo"ti,.".ft.", ,." I )

RIJwlunl,,,,Heady It Gresbam (India) Ltd, New DelhiNational Metallurgical Laboratory ( CSIR ).

JamlbedpurSaBI N. C. JA11' Stup Consultants Ltd, Bombay

SRRI M. C. TAXDOM ( AI'"".',)SRRI M. P. JASUJA Relearcb at Development Centre (or Iron and Steel

( SAIL ). RanchiSRRI A. JAYAOOPAL Engineer-in-ChleC'. Branch, Army Headquarten

MAti R. C.llANDBA8HBABAlf ( ~1'matI',)SRRI S. Y KHAN Killick Nixon Ltd, Bombay

SHar P. S. VDKAT ( .41'""", )SOl M. N. KHA1flfA Bhilai Steel Plant ( SAIL), Bhila~

SRRI C: DAIOVPTA ( .AI""",,, )SaBI H. N. KBJ8••A MURTBY Tor Steel Research Foundation in India, Calcutta

DR C. S. VIIWAXATKA ( .4lI",..,,~SRRI S. N. MAHOBAB Tata COnsultiDI Engineen, Bombay

SRBI N. NAGARAJ (.4""""")SRRI R. K. MAT.va Public Works Department, LucknowSOl S. N. PAL M. N. Dastur It Co (P) Ltd, Calcutta

SRRI SALIL Roy ( AlIn".,.)58&1 B. K. PAlITBAKY Hindustan Construction Co Ltd, Bombay

SO! P. V. NAlB: ( AI,,,,,.,,)SBKl T. S... IR.C Steels Ltd, CalcuttaSIIBI M. V. SHA8TRY Roads Wing ( Ministry of Shippinl and Transport)SRBt SR1RI8R H. SRAH TensilE'Steel Ltd. Bombay

SIll\I M. S. PATHAIC ( Al',nua', )SRBI C. N. SRJMIVA8AM C. R. Naray.na Rao, Madr..

SBRJC.N.RAQHAV"DBAN(Ahu~u)SRBr K. S. SRJJfIVA8AJf National BUlidinSI Organization, New Delhi

SHBJ A. K. LAL ( AI,,,,,.,,)8IUu G. RAMAH. Director Gen~r.l,DIS ( &-oJin. M""6,, )

Director ( Civ Enll )

Sm"'"SRBI~.N.N"LAKANDBA.

AIIi.taol Director ( ely En.1 ), IiI

2

AMENDMENT NO. 1 JULY 1988

TO

15:2090-1983 SPECIPICATION POR HIGH TENSILESTEEL BARS USED IN PUSTllBSSED CONCUTE

(First Revision)

(Page 4. clause 3.2. third sentence)Substitute the following for the existins matter:

'Unle.1 otherwise agreed between the purchaler andthe manufacturer or supplier the bars shall notcarryon its surface lubricants, rust or othermatter to a degree llkely to impair its adhelion toconcrete. '

(BSMDC 8) Reprography Unit, SIS J Nev Delhi. India

Indian StandardSPECIFICATION FOR

HIGH TENSILE STEEL BARS USED INPRESTRESSED CONCRETE

(First Revision)

o. FOREWORD

0.1 This Indian Standard (}1irlt Revision) was adopted by the IndianStandards Institution on 14 March 1983, after the draft finalized by theJoint Sectional Committee for Concrete Reinforcement had beenapproved by the Civil Engineering Division Council.

0.2 This standard was first published in 1962 to cover the requirementsor high tensile steel bars used in prestressed concrete. The presentrevision hal been taken up with a view to incQrporating modification.found neceuary u • result of experience gained in using this standardboth by manufacturers and use....

0.3 It:' this revision, modifications have been incorporated in provisionsrelating to tolerances, proof stress and relaxation test. The requirementof young's modulus has been deleted. Further 8.1. units have beenadopted for specifying the various physical requirements in the standardand references to varioul other Indian Sandard. appearing in thisItandard have been updated.

0.4 In the formulation ofthi. standard, due weightage has been given tointernational co-ordination amon~ the standard and practices prevailing.in different countries in addition to relating it to the practices in the fieldin this country.

0.5 For the purpose of deciding whether a particular requirement of tbi.standard i. complied with, the final value, observed or C'aJcuJated.expressing the result of a test or analysil, shall be rounded off in accord­ance with IS : 2·1960-. The number of significant places retained in therounded off value should be the lame as that of the Jpecified value in'his standard.

-aut. lor rouDdin. ofF DumericaJ values ( ,ft';,. ).

18 I 2090 • 1983

1. SCOPE

1.1 This standard covers the requirements for high tensile steel bars usedin prestressed concrete.

2- TERMINOJ..OGY

2.0 For the purpose of this standard, the following definitions shallapply.

2.1 Ba.. - A rolled rod or bar of steel of circular cross-section.

2.2 EloaptioD - The increase in length of a tensile test specimen understress, The elongation at fracture is conventionally expressed as apercentage of the original gauge length of the standard test specimen.

2.3 BIBh Tea.lle Steel - Alloy steel having a tensile strength of notless than 980 N/mml .

2.4 Noml.a. Size - The dimension of the diameter of the bar.

2.5 Proof Stre•• - The streiS which produces a residual strainof 0-2 percent of the original gauge length ( non-proportional elongation ).

2.6 Tea.lle Strea,tla - The maximum load reached in a tensile testdivided by the orlginal cross-sectional area of the gauge length portionof the test specimen. ·

3. MANUFACTURE AND CHEMICAL COMPOSmON

3.1 The steel shall be manufactured by the.open-hearth, electric, duplex,acid bessem er, basic oxygen ( LD ) process or a combination of theseprocesses with the addition of necessary alloying elements, In case anyother process is employed in the manufacture, prior approval of thepurchaser shall be obtained. The steel shall be hot rolled into bars andsubsequently processed to ~ive the required physical properties. Whrrethe ban are threaded the thread shall be either cut or rolled. Threadedends shall be protected from corrosion and damage.

3.1.1 The ladle analysis of steel when made in accordance with therelevant parts of IS : 220* shall show that steel contains not more than0·050 percent of sulphur and not more than 0'050 percent ofphosphorus.

3.2 All finished bars shall be cleanly rolled to specified dimensions.They shall be sound and free from splits, harmful surface flaws. rough.jagsed and imperfect edges; and other r'efects, Unless otherwise agreedbetween the purchaser and the manufacturer, they shall not carry rustor other matter to a degree likely to impair their adhesion in concrete•.

-Method, Cor chemical analyl. or steels (.$",1111 "";,." ) ( heiR' iIIued in para ).

4-

II.~·I-

4. NOMINAL IIZU

f.1 Ban .hall be manufactured in the fcllowiDI DOmina) liIea:10, 12, 16, 20, 22, 25, 28 and 32 mm.

5. TOLDANCBI

1.1 N••laaI 1_ - The tolerance OIl the nominal Ii. .hall be:t: 0·5 mm for ban up to and includinl25 mm and :I: 0-6 mm Cor banabove 25mm,

5.2 ••• - The tolerance OD the maa of the finilhed bar .hall be• 5 percent for ban of diameter up to and inc)udinS16 mm and :I: 3p8rc1Dt tor ban above 16 mm,

KGI'll - Whe. ban aN ordered by IIWI, the m.. of the ban ,h.n be calculated_ the.. that billa -.i.. .... wei•• 0-785 "'em' or Cl'C*-llCdonal area per.... rua.

U Whea necellary, other toleraDca may be agreed between thepurch..r ud tbe maaufacturer.

I. PIlYlIcw. UQ,UlUMBNTI

1.1 Th. tenlU. ItreDlth, proof atreal and aloftlltion. when determinedill accorduc:e with 7.2.2 .haJI be uliven in Table 1.

T~I_"O.""""O.~(a..8.1)

....VIDImft

..N/•••Not 1_ tIaaD 80~Dt 01 the

........ IpICifieci te"•......10 J*'C*II

u 1leI•••tt.. - The relaxation of.t..... ia the bar, wheD tested illaccordant» with 7.s, .hall DOC exceed 49 N/mrnl at the end of 1000 bou....Alteraatively, the manuracturer ahall provide proof that the quality ofbar IUppliediI.uch u to comply with th. t.t requiremeDL

7. TBlTI

7.1 leleedoa"T_t 1pecbD••

7.1.1 All t.t lpedmeD' .hall be or lu8icient leDith for the lpeci8edlett. ad may be cue either from the .ad. or the ban beforecuttinl to

5

11. __ ·1_"

finished lengths or from any part or the bar in the presence of thepurchaler or his authorized representative.

7.1.2 Before the specimens are selected, the manufacturer or lupplierthan turnish the purchaser or his authorized representative with copiesof mill record. ~iving the number of bars in each cast with lizu, markl,etc. whereby the bar. can be identified.

7.2 T...n• .,...7.2.1 The test specimen. shall not be annealed or otherwise lubjected

to heat treatment uniesl the ban from which they are cut are similarlytreated in which case the specimen Ihan be similarly and simuitaneoullytreated with the bar. before teltin,.

7.2.2 The tensile strength. proof stress and elongation sball bedetermined in accordance with the methods specified in IS: 1608­1972·.

Non - In cun where the manutlcturinl proe_ iDcludft cold worldlli. t .... todetermine compliaae8 with proof Itt. requlrelDeDti need not be aaade wltbiD 48houn 01such cold wor~int.

7.3 eo••taat Strala a.lautlo. TNt -If required by the purch••r,the manufacturer shall provide evidence from record. oftesu oflimilarban that the relaxation or stress from an initial stress of 70 percent or thespecified minimum tensile strength conform. to that specified in &.2.Durin~ the whole .period o(telt the temperature .han be maintained at20 :II 2°C. The initial load shall be applied in a period .of not morethan 5 minutes and ,han then be held constant for a further period ofone minute. Thereafter no adjustment of load shall be made, and theload relaxation reading••hall commence (ro~ the end or sixth minute.On no account shall the telt piece be oventrell.d. The Dumber oflpecimen. tested shall be as agreed between the purcb..r and themAnufacturer.

L SAMPLING AND CRITERIA FOR CONFORMITY

1.1 Seale .r laaapilal

I.J.1 lA, - In any consi.nment. all the high tensile steel bars of the..me size and manufactured from the same cast shall begrouped togetherto coft4ttitute a lot.

1.1.2 The number or bars to be selected at random from the lot shalldepend u~n the size of the lot and shall be in accordance with col 1and col 2 of Table 2.

• Metbod lor tendJ. c_l... ol.teel produc~(firsl ,1IIiri. ).6

... ,18 I 2090- 1183

T.dLB 2 llZE OW TBB lAM.... AND IVII-IAMPLB( Cltlus" 8.1.2 aDd8.2.3 )

LOT SI•• S,I. or SAM.LB StIR 01' SUB-SAUL.

(I) (2) (3)

Up to 50 5 251 to JOO 10 2

101 to 200 15 2201 to SOO 20 S901 to 500 30 3501 and above 40 5

1.2 H••ber of Te.t.

L2.1 All the bars selected al in Ll.2 .hall be examined for freedomCrom defects (I" 3.2) and tolerance on nominal lize and mass( ", 5 ).

L2.2- R.equisite material from anyone of the ban in tbe lot shan belubjected to chemical analysis ( SII 3.1.1 ).

1.2.3 The number of bars to be subjected to the tensile test (I" 7.2 )shall be equal to the lize of the sub-eample al given in col 3 of Table 2.

1.3 C.-lterl. lor (Joalo....lty

8.3.1 The lot shall be considered as conrorminl to the requirements ofthis specification if the conditions mentioned in 8.3.2 to 8.3.5 aresatisfied.

8.3.2 The number of bars failing to satisfy one or more of therequirements specified in t and 6 shall not exceed the correspondingpermissible Dumber given below:

Si(, ofSom," P,rmissi61, Numb"5 0

10 J15 I20 230 340 3

L'.' The results of chemical analysis for phosphorus and sulphuecontent on the lamp.le tested shall sati,ry the requirements given under

7

II ,28M. 1_3.1.1 If the test results Cor any of the characteristics fail to satisfy thecorrespondin~ requirement., two more teats (or that characteristic shallbe done and both these test results ahall latisfy the requirement. for thatcharacteristic.

1.3.t For physical requirements except proof strels, the mean and therange oCthe test results obtained for the various characteristic shall satisfythe appropriate condition(s) given below:

'a) ( Mean ~ 0'6 Range) shan be lesl than or equal to the maximumspecification limit.

b) ( Mean - 0-6 Range) shall be greater than or equal to theminimum specification limit.

1.3.5 For proof stress, an the test specimens shan satilfy the require­ments of the characteristic.

9. DELIVERY. INSPECTION AND TESTING rAClLITJB1

'.1 Unle.. otherwise sPf'cjfied, general requirements relatin, to thelupply of material, inspection and testing shall conform to IS : 1387-1967·.

9.2 No material shall be de.patched from the manufacturen' or lupplien'premises prior to its being certified by the purchaser or hit authorizedrepresentative as having fulfilled the tests and requiremenn laid down inthis standard except where the bundle or coil containing the wire ismarked with the lSI Certification Mark.

9.3 The purchaser or hi. authorized representative shall be at liberty toinspect and verify the steel maker'. certificate of cast analysis at thepremises of the manufacturer or supplier; when the purchaser requiredan actual analysis of finished material, this shall be made at a placeagreed to between the purchuer and the manufacturer or IUppUer.

9.-1 MalUllacttlrft C.tlecate - In the ease of ban which have notbeen Inspected at the manufactul'er's works, the manufacturer or supplier.as the ea. may be, ~halliupply the purchuer or hi. authorised reprelen­tative with the certificate stating the procell of manufacture and teltAheetl liRned by the manufacturer ~iving the relult of each mechanicalteat applicable to the material, and the chemical composition if required.Each test !heet shan indicate the number or ideatification mark to befound on the materiaJ.

9.5 When test for relaxation il required to be carried out, the COlt ortesting ahall be borne by the purchaser.

·Oeneral nquiremeau for the IUpply 01 metallurlical ana.rial. (lrsl rIC;'. ).

a

IS I 2090 • 1983

10. IDENTIFICATION AND MARKING

10.1 The bar manufacturer shall attach to every bundle a suitable metal1a~ which shall bear the manufacturer's name, the size of the bar, thehvat number of the rast from which the bars have been rolled and thef1 ..,i~nation of the standard. All bars or bundles of bars shall be markedin -uch a \vay that it is possible to trace all finished bars to the cast from\\ hich I h(\y were made.

10.1.1 Each bar or the metal tag attached to every bundle of bars mayalso be marked with the Standard Mark..

NOTE - The use or the Standard Mark il loverned by the provisions or theBureau or I ndian Standards Act, 19.i6 and the Rules and Relulation~ made there­under. The Standard MJrk on products covered by aD Indian Standard conveysthe a"\lr.'I1~e that they have been produced to comply with the requirements of that"andard under a well defined system of inspection. testin. and quality controlwhich IS dev...ed and super\'i~ed by DIS and operated by the producer. Staodardmarked products are also continuously checked by BIS for conforlnity to that~tandard a~ a further safcluard. Details or conditiODs under which. licence forthe use of the Standard Markmaybesranted to manufacturen or producers maybe obtained from the Bureau of Indian Standards.

9

BUREAU OF INDIAN STANDARDS

2 51 71

62436

231083

{6 34 7169832

{21 68 7621 82 92

6'23 05f6 21 04\6 21 17

Southern: C. I. T. Campus, MADRAS 600113

H••dqu.nef.:Mlnak Shavan, 9 Bah.dur Shah Z.fa, M8rg, NEW DELHI 110002Telephones: 331 01 31. 331 13 76 Telegrams: Manak.8neth8

( Common to 811 Offic•• )T.',phone

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Stanch Offices:,pushpak·, Nurmohamed Shaikh Marg, Khanpu" I 2 63 48

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BHOPAL 462003Plot No. 82/83. lewis Road, BHUBANESHWAR 761002 6 36 2763;6. Ward No. 29, R.G. SarU8 Road, 6th Bvelene, 3 31 77

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