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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.

!"#$% '(%)

!"# $ %& #' (")* &" +#,-.Satyanarayan Gangaram Pitroda

Invent a New India Using Knowledge

/0)"1 &2 324 #' 5 *)6Jawaharlal Nehru

Step Out From the Old to the New

7"#1&"8+9&"), 7:1&"8+9&")Mazdoor Kisan Shakti Sangathan

The Right to Information, The Right to Live

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IS 1077 : 1992( Reaffirmed 2002)

jrj

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AMENDMENT NO 1 MAY 2008TOIS 1077 : 1992 COMMON BURNT CLAY BUILDINGBRICKS - S PE CIF ICAT IO N

Fifth RevisionPage 3, clause 7.1.1, fourth line - Insert b y more than 15 percent after

class of brick .

CED 30)Rcprography Unit, BIS NewDelhi,India

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Clay Products for Buildings Sectional Committee, CE D 30

FOREWORD his In di an S ta nd ar d Fifth Revision \\ 8S ado pted by the Bureau of Ind ian Stand ards, after thed ra ft finalized by the Clay P ro duc ts for Buildings Sectional Committee had been a pproved by theCivil Engineering Division Council.The common building bricks is not only one of the oldest but also the most extensively usedb uilding material in con stru ctio n work. It is essentially a local building material and consequentlythere exist considerable variations in the quality of raw material. the process of manufacture andthe quality of the finished p ro du ct . R api d building activity, to be on rational lines, needs a certaindegree of uniformity in the construction materials. Standardization of the common building brickwith regard to its quality and dimensions would substanitally help in raising the quality ofconstruction work an d its speed.Keeping in view the advantages of modular co-ordination. Indian standards specify thedimensions of standard bricks in 100 mm module as the basis of all dimensional standardization in regard to building components. This is also in confirmity with the decision ofGovernment of India to adopt metric system in the country. Considering the various issuesreg arding the man ufactu ring and o th er practices followed in the cou ntry , the Sectional Committeeresponsible for the preparation of this standard had specified modular size of the brick. Adv an tagest ha t a mo du la r brick has over t ra di ti ona l brick are many, such as:

i requires less drying area;ii saving in space of floor area;

economy in cost of brick masonry;iv saving in labour cost;v less losses during handling, etc; and

vi less consumption of mortar.However. it was b rou ght to the notice of committee that there was sufficient demand for sizes othetthan modul ar sizes and that the manufacturers were meeting such demands at present. This hadled to a situation where bricks satisfying other requirements of the standard, but not the requirementsregarding dimensions w r classified as not satisfying the requirements of the s ta nd ar d. Therefore,the committee reviewed the relevant clause of Ind ian Stand ards and decided to include the nonmodular size of the brick in addition to the modular size specified in the standard at present.This relaxation will be for a period of four years from the pu blicatio n of this stand ard and. it isintended that the manufacturers and consumer organization can gradually switch over with thep eriod to the mod ular sizes, which are the preferred sizes.For the purpose of deciding whether a p articu lar requ irement of this standard is complied with,the final value, observed or calculated, expressing the result of a test or analysis, shall be roundedoff in accordance with IS 2 : 1960 Rules for rounding off numerical values i revised , The numberof significant places retained in the ro unde d off value shoul d be the same as that of the specifiedvalue in this stand ard.

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IS 1077: 1992Indian Standard

COMMON BURNT CLAY BUILDINGBRICKS - SPECIFICATION Fifth Revision

1 SCOPE1.1 This standard Jays d ow n r eq ui re me nt s fo rc la ssif ic at io n, g en er al quality, dimensions andphysical requirements of common burnt claybuilding bricks used in buildings.

NOTE - Burnt clay bricks having compressivestrength less than 40 N/nlln2 ( approx 400 kgf/c111 1 )ar e covered in this standard an d for h ig he r s tr en gt h,see IS 2180 : 1988.

5. 2 Hand-moulded bricks of 90 mm or 70 111111height shall be moulded with a frog 10 to 20 mrndeep on on e of it s flat sides; t he s ha pe a nd sizeo f th e f ro g s ha ll conform to either Fig. IA or Fig.1B s 6.1.1 fo r L Wan d I I Bricks of 40 mrnheight as well as t ho se m ad e by extrusion processmay no t be provided with frogs.5. 3 Th e bricks shall have smooth rectangularfaces with sharp corners an d shall be uniform incolour.

2 REFERENCES 6 DIMENSIONS AND l OLERANCES6.1 Dimensions

( J,Vn1019090

2.1 Th e Indian Standards listed in Annex A arenecessary adjuncts to this standard.3 TERMINOI.JOGY3.1 Fo r the purpose of this standard, thedefinitions as given in IS 2248 : 1992 shall apply.

6.1.1 The s ta nd ar d m od ul arbuilding bricks shall be asan d 1B :Length ( mm190190

size o f commonfollows Fig. IA

Height ( Hmm90404 CLASSIFICATION4.1 Th e common burnt clay bricks shall beclassified on th e basis o f a ve ra ge c om pr es si vestrength as given in Table 1.

6.1.2 The following non-modular sizes of thebricks may also be used ig. 1A an d IB ):Length L) Ulidt Height IImm mm mrn230 110 70

23 0 110 30

5 GE NE RAL QUALifY

Table t Classes of Common B ur nt C la y B ri ck s Clause 4. t )

5.1 Bricks shall b e h an d- mo ul de d or machinem ou ld ed a nd shall be made from suitable soils.They shall be free from cracks and flaws an dnodules o f free lime.

Average Compressive Strengthnot Less ThanN /1l1n11 ( kgf/cm )upprox )Height // ).mm70 length

brick

6.1.2.1 For obtaining p ro per b ond arr an ge men tan d modular dimensions for the brick work, withthe non-modular sizes, th e following si/es of th ebricks may also be used:

Length L) (mm nun70 J 106.2 TolerancesThe dimensions o f b ri ck s when tested in accordance with 6.2.1 shall be within th e followinglimits pe r 20 bricks:

a) F o r m o du la r sizel..ength 3 720 to 3 880 nu n ( 3 gOO :1: 80 mrn )Width 1 760 to 1 840 n1 11 I R J_40 nun )Height 1 76 0 to I 840 mm ( 18 >0:1: 40 1111n )( Fo r 90 111ln high bricks)7 6 0 t o 840nlln 8 0 0 i . 4 0 I n m )( For 40 111ln high bricks)b) For non-modular sizeLength 4 520 to 4 680 mm ( 4600 mm )Width 2240 to 2 160 tum 2200J:40 InITIHeight I 440 to 1 3601l1nl ( 140040 rnm )( For 70 mrn high bricks )64 0 to SoO rnm 600 40 min( For 30 nu n high bricks)

( 350)300 )( 250 )( 200)( I )( 150 )( J25 )( 100)( 75 )( 50 )( 35 )

35 030 025 020 017 5J5 O12 510 0

7 S5 03 5

35302520J512 5

107 S53 5

ClassDesignation

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IS 1077 : 1992R 20

... llA 18

All dimensions in millimetres.FIG 1 SHAPE AND SIZE OF FROGS IN BRICKS

A MEASUREMENT OF LENGTH

.. - - - 8 MEASUReMENT OF WIDTH

~ - - : : l ' - - - ' - - - - - - - - - . . . , . . . . ~ . . . - - ~

_ 4 _ ~ -- -- wf - - - - - . . ~ - - F - - - - - - _. - - - - ----.... ....-wr2C MEASUREMENT OF HEIGHT

Fro 2 MEASlJREMENT OF TOlERAl\CES OF COMMON BUILDING BRICKS

6.2.1 Twenty or more according to the size ofstack whole bricks shall be selected at randomfrom the sample selected under 8. All blisters,loose particles of clay and small projections shallbe removed. The y shall then be arranged upon alevel surface successively as indicated in Fig. 2A,28 and 2C in contact with each other and in astraight line. The overall length of the assembledbricks shall be measured with a steel tape orother suitable incxtensiblc 111CaSUre sufficientlylong to measure the whole row at one stretch.Measurement by repeated application of shortrule or measure sha ll no t be permitted. If. forany reason it is found impracticable to measure

bricks in one row, the sample may be divided intorows of 10 bricks each which shall be measuredseparately to the nearest millimetre. All thesedimensions shall be added together.7 PHYSICAL REQUIREMENTS7.1 Compressive StrengthThe bricks, when tested in accordance with theprocedure laid down in IS 3495 Part I ) : 1992shall have a minimum average compressivestrength for various classes as given. in 4.1.

2

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7.1.1 The compressive strength of any individualbrick tested shall no t fall below the minimumcompressive strength specified for the correspond-ing class of brick. The lot shall be t hen checkedfo r next lower class of brick.7.1 Water AbsorptionThe bricks, when tested in accordance with theprocedure laid d \\ l in IS 3495 Part 2) : 1992after immersion in cold water for 24 hours,water absorption shall not be more than 20percent by weight up to class 12 5 and 15 percentby weight for higher classes.7.3 Efflorescence

IS 1077: 1992the rating of efflorescence shall not be morethan moderate up to class 125 and slight forhigher classes.8 SAMPLING AND CRITERION FORCONFORMITY8.1 Sampling and criterion for conformity ofcommon bricks shall be done in accordance withthe procedure laid down in IS 5454 : 1978.9 MARKING

9.1 Each brick shall be marked in the frogwhere provided) with an indication of source ofmanufacture.

The bricks when tested in accordance with the 9.1.1 The manufacturer may also use theprocedure laid down in IS 3495 Part 3 ) : 1992 Standard Mark.

ANNEX A Clause 2.1 )

LIST OF REFERRED INDIAN STANDARDSIS No.

2180 : 1988

2248 : 1992

3495 Part 1 ) : 1992

TitleSpecification for heavy-d utyburnt clay building bricks second revisionGlossary of terms relating tostruc tura l clay products forbuildings second r v s on Methods o tests of burnt claybuilding bricks: Par t I Determination of compressivestrength third revision

3

IS No.3495 Part 2 ): 1992

3495 Part 3 ) : 1992

5454 : 1978

TitleMethods o tests o urnt claybuilding bricks: Part 2 Deter-mination of water absorption third revisionMethods of tests of urnt claybuilding bricks: Part 3 Determination of efllorescence third revisionMethods for sampling of claybuilding bricks first revision

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Bureau of Indian Standards81 S is a statutory institution established under the Bureau Indian Standards ct 1986 promoteharmonious development of the activities of standardization. marking and quality certification of goodsand attending to connected matters in the country.

~ o t J y r i ~ h t

S has the copyright of all its publications. No part of these publications may be reproduced in anyIorm without the prior permission in writing of BIS. This docs not preclude the free usc, in course ofimplementing the standard, of necessary details, such as symbols and sizes. type or grade designations.Enquiries relating to copyright be addressed to the Director Publications) SIS.Review of Indian StandardsAmendments arc issued to standards as the need arises on the basis of comments. Standards arc alsoreviewed periodically: a standard along with amendments is reaffirmed when such review indicates thatno changes arc needed; if the review indicates that changes are needed, it is taken up for revision. Usersof Indian Standards should ascertain that they are in possession of the latest amendments or edition byreferring to the latest issue of BIS Catalogue and Standards: Monthly Additions .This Indian Standard has been developed from Doc No CED 30 4978 )

Amendments Issued Since Publication....Amendment No.

_ ~ _Date of Issue

BUREAU OF INDIAN STANDARDS

Text Affected

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