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COMMON BURNT CLAY BUILDING BRICKS- SPECIFICATION ( Fifth Revision )
Second Reprint AUGUT 1996 UDC 666’762’7 12
0 BIS 1992
v) less losses during handling. which are the preferred sizes. observed or calculated. degree of uniformity in the construction materials. such as: i) requires less drying area. the process of manufacture Rapid building activity. Advantages that a modular brick has over traditional brick are many. For the purpose of deciding whether a particular the final value. result of a test or analysis. Considering the various issues Government of India to adopt metric system in the country. etc. Standardization of the common building brick with regard to its quality and dimensions would substanitally help in raising the quality of construction work and its speed. iv) saving in labour cost. the committee reviewed the relevant clause of Indian Standards and decided to include the nonmodular size of the brick in addition to the modular size specified in the standard at present. CED 30
FOREWORD This Indian Standard ( Fifth Revision ) was adopted by the Bureau of Indian Standards. Indian standards specify the dimensions of standard bricks in 100 mm module as the basis of all dimensional standardizThis is also in confirmity with the decision of ation in regard to building components. shall be rounded off numerical values (revised)‘. requirement of this standard is complied with.Clay Products for Buildings Sectional Committee. expressing the off in accordance with IS 2 : 1960 ‘Rules for rounding of significant places retained in the rounded off‘value value in this standard. to be on rational lines. it was brought to the notice of committee that there was sufficient demand for sizes other than modular sizes and that the manufacturers were meeting such demands at present. regarding the manufacturing and other practices followed in the country. the Sectional Committee responsible for the preparation of this standard had specified modular size of the brick. but not the requirements regarding dimensions were classified as not satisfying the requirements of the standard.
However. needs a certain the quality of the finished product. This had led to a situation where bricks satisfying other requirerrents of the standard. The number should be the same as that of the specified
. ii) saving in space of floor area. after the draft finalized by the Clay Products for Buildings Sectional Committee had been approved by the Civil Engineering Division Council. Therefore. The common building bricks is not only one of the oldest but also the most extensively used building material in construction work. Keeping in view the advantages of modular co-ordination. This relaxation will be for a period of four years from the publication of this standard and it is intended that the manufacturers and consumer organization can gradually switch over with the period to the modular sizes. It is essentially a local building material and consequently and there exist considerablevariations in the quality of raw material. and vi) less consumption of mortar. iii) economy in cost of brick masonry.
the purpose of this standard.2 Tolerances The dimensions of bricks when tested in accordance with 6.2 Hand-moulded bricks of 90 mm or 70 mm height shall be moulded with a frog 10 to 20 mm deep on one of its flat sides.1.l for L. with the non-modular sizes.SPECIFICATION ( Fifth Revision )
. I A and 1B ): Width CW) Length (LJ Height (H) mm mm 110 :: 110 230 :: 6. shall be as follows (Fig.
Classes-of Common Burnt Clay Bricks
( Clause 4. seelS 2180 : 1988.NSfONS
6.1 shall be within the followingT limits per 20 bricks: a) For modular size Length 3 720 to 3 880 mm ( 3 800fSO mm) Width 1 760 to 1 840 mm ( 1800&40 mm) Height 1 760 to 1 840 mm ( lSOOf40 mm) ( For 90 mm thigh bricks) 760 to 840 mm~( 800f40 mm ) .Burnt clay bricks having compressive strength less than 40 N/mm* ( approx 400 kgf/cm* ) are covered in this standard and -for higher strength.2 The following non-modular sizes of the bricks may also be used ( Fig. They shall be free from cracks and flaws and nodules of free lime.1. general quality.t. 1B (see 6. the shape and size of the frog shall conform to either Fig.
for and clay
5.IS 1077 : 1992
COMMON BURNT CLAY BUILDING BRICKS. the definitions as given in IS 2218 : 1992 shall apply.2. IA or Fig.2.1 This standard lays down requirements classification.1 The common burnt clay bricks shall be classified on the basis of average compressive strength as given in Table 1.gth brick 6. dimensions physical requirements of common burnt building bricks used in buildings. 4 CLASSIFICATION
standard modular size of common building bricks. 3 TERMINOLOGY
3. 5.1.3 The bricks shall have smooth rectangular faces with sharp corners and shall be uniform in colour.
4.1 The AND TOLERANCES
NOTE .1 For obtaining proper bond arrangement and modular dimensions for the brickwork.1 Bricks shall be hand-moulded or machinemoulded and shall be made from ‘suitable soils.1 ) Class Designation
AverageCompressive Strength not Less Than
N/mms 35’0 30’0 25’0 ( kgf/cnP ) ( approx ) ( 350 ) (300) ( 250 )
17’5 15 12’5 10 7’5 5 3’5
17’5 15’0 12’5 10’0 7’5 5’0 3.1 For 2. 6 DIME.5
(175) ( 150 ) (125) (100) ( 75 ) ( 50 ) ( 35 )
5. IA and 1B ): Width ( -W) Length ( L ) Height (H) mm mm mm 190 Z: 190 :: 6.
2 REFERENCES Indian Standards listed in Annex A are necessary adjuncts to this standard. Bricks of 40 mm height as well as those made by extrusion process may not be provided with frogs.( For 40 mm high bricks) b) For non-modular size Length 4 520 to 4 680 mm ( 4600 f 80 mm ) Width 2240 to 2 160mm (2200&40 mm) Height I 440 to 1360 mm ( 1400f40 mm ) ( For 70 mm high bricks) 640 to 560 mm ( 600f40 mm) ( For 30 mm high bricks )
. Wand H ).1 Dimensions 6. the following sizes of the bricks may also be used: Width ( W) Length CL) Height(H) mm mm 110 70 70 +?:.
for any reason it is found impracticable to measure 2
bricks in one row. loose particles oi clay and small projections shall be removed.1.2. 2A. when tested in accordance with the procedure laid down in IS 3495 (Part 1) : 1992 shall have a minimum average compressive strength for various classes as given in 4. 2
MEASUREMENT OF TOLERANCES OF COMMON BUILDING BRICKS
6.7 H 1
All dimensions in millimetres. 7 PHYSICAL REQUIREMENTS
7. All blisters. All these dimensions shall be added together. the sample may be divided into rows of 10 bricks each which shall be measured separately to the nearest millimetre. Measurement by repeated application of short rule or measure shall not be permitted.1 Twenty ( or more according to the size of stack) whole bricks shall be selected at random from the sample selected under 8. 2B and 2C in contact with each other and in a straight line.1 Compressive Strength The bricks. FIG.measure the whole row at one stretch. The overall length of the assembled bricks shall be measured with a steel tape or other suitable iucxtensible measure sufficiently long to . They shall then be arranged upon a level surface successively as inflicated in Fig. If. 1 SHAPE AND SIZE OF FROGS IN BRICKS
3495 (Part 2): Title
Specification for heavy-duty burnt clay building bricks ( second revision ) Glossary of terms relating to 2248 : 1992 structural clay products for buildings (second revision ) 3495 Methods of tests of burnt clay ( Part 1 ) : 1992 building bricks : Part 1 Determination of compressive strength ( third revision )
Methods of tests of burnt clay 1992 building bricks : Part 2 Determination of water absorption ( third revision ) Methodsof tests of burnt clay 3495 (Part 3 ) : 1992 building bricks : Part 3 Determination of eflorescence ( third revision ) Methods for sampling of clay 5454 : 1978 building bricks (first revision )
. water absorption shall not be more than 20 g MARKING percent by weight up to class 12’5 and 15 percent by weight for higher classes.3 Efilorescence The bricks when tested in accordance with the procedure laid down in IS a3495 (Part 3 ) : 1992
9.1 Sampling and criterion for conformity of The bricks.1.1 The
manufacturer Standard Mark.2 Water Absorption
the rating of efflorescence shall not be more than ‘moderate up to class 12’5 and ‘slight’ for higher classes.
INDIAN STANDARDS IS No. after immersion in cold water for 24 hours.
ANNEX A ( Clause 2.1.IS 1077 : 1992
7. The lot shall be then checked for next lower class ~of brick.1 Each brick shall be marked (in the frog where provided ) with an indication of source of manufacture.1 The compressive strength of any individual brick tested shall not fall below the minimum compressive strength specified for the corresponding class of brick. 7. 9. when tested in accordance with the common bricks shall be-done in accordance with procedure laid down in IS 3495 (Part 2) : 1992 t h e procedure laid down in IS 5454 : 4978.1 )
IS No. 8 SAMPLING AND CRITERION CONFORMITY FOR
BUREAU OF INDIAN STANDARDS Headquarters: Manak Bhavan. V. Campus.I. This does not preclude the free use. 9 Bahadur Shah Zafar Marg NEW DELHI 110002 l/14 C. if the review indicates that changes are needed.235 04 42 15 19.I. No part of these publications may be reproduced in any form without the prior permission in writing of BIS. CED 30 ~(4978 )
Amendments Issued Since Publication i. KANPUR.
Reprography Unit.235 23 15 Manakalaya. BIS.337 85 61 84 9120
26. HYDERABAD. MADRAS 600113 1 235 02 16. Users of Indian Standards should ascertain that they are in possession of the latest amendments or edition by referring to the latest issue of ‘BIS Handbook’ and ‘Standards Monthly Additions’. Enquiries relating to copyright be addressed to the Director (Publication). New Delhi 110002 Telephones: 323 0131. such as symbols and sizes.323 83 75. COIMBATORE.337 (603843 25 ~6020
C. GUWAHATI.I. IV Cross Road. Sector 34-A. PATNA.P. 1986 to promote harmonious development of the activities of standardization. JAIPUR.Bureau of Indian Standards
BIS is a statutory institution established under the Bureau of Indian Stundurds Act.T. Andheri (East) MUMBAI 400093 { 832 92 95.
Amendments are issued to standards as the need arises on the basis of comments. in the course of implementing the standard. BANGALORE.323 94 02 Regional Offices: Central Eastern Northern Southern Western
Telegrams: Manaksanstha (Common to all offices) Telephone 323 76 17. New Delhi.T. THIRUVANANTHAPURAM. This Indian Standard has been developed from Dot: No. ManiktoIa CALCUTIA 700054 SC0 335-336.
BIS has the copyright of all its publications.832 78 58 78 78~92 91. BIS. BHUBANESHWAR. BHOPAL. Marol. Standards are also reviewed periodically. marking and quality certification of goods and attending to connected matters in the country. Road. it is taken up for revision. LUCKNOW.323 38 41
Manak Bhavan. In&a
Amend No.832
Branches : AHMADABAD. FARIDABAD. type or grade designations. a standard along with amendments is reaffirmed when such review indicates that no changes are needed. of necessary details. CHANDIGARH 160022
1337 86 99. 9 Bahadur Shah Zafar~Marg. E9 MIDC. GHAZIABAD. Scheme VII M.
1. fourth line) –
Insert ‘by more than 15 percent’ after
‘class of brick’.NO.1. India
. 1 MAY 2008 TO IS 1077:1992 COMMON BURNT CLAY BUILDING BRICKS — SPECIFICATION
( F~th Revision )
(CED 30) ReprographyUni~BIS. clause 7.New Delhi.
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