IS 15476:2004

Indian StandardBAMBOO MAT CORRUGATED

SHEETS SPECIFICATION

ICS 79.060.99

0 BIS 2004

BUREAU OF INDIAN STANDARDSMANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG

NEW DELHI 110002

May 2004 Price Group 6

-, .,-J-I

JWood and Other Lignocellulosic Products Sectional Committee, CED 20

FOREWORD

This Indian Standard was adopted by the Bureau of Indian Standards, after the draft finalized by the Woodand Other Lignocellulosic Products Sectional Committee had been approved by the Civil EngineeringDivision Council.

Roofing is an essential ingredient of any house and in India several roof cladding materials are in use includingburnt clay/Mangalore tiles, thatch and corrugated sheet of galvanized iron, aluminium and asbestos. Of these, forsemi permanent structures corrugated sheets are preferred.

A need was felt for developing alternate eco-friendly, energy efficient and cost effective roofing sheets. Thisstandard on bamboo mat corrugated sheets ( BMCS ) has been formulated to provide guidance in respect ofmanufacture, testing and selection of such roofing sheets. These sheets have been found to be resistant to water,decay and fire. They are light but strong and possess high resilience and offer thermal comforts. In the preparationof this standard, considerable assistance has been rendered by IPIRTI, Bangalore.

The composition of the Committee responsible for the formulation of this standard is given at Annex J.

For the purpose of deciding whether a particular requirement of this standard is complied with, the final value,observed or calculated, expressing the result of a test or analysis, shall be rounded off in accordance with1S2:1960 Rules for rounding off numerical values ( revised). The number of significant places retained in therounded off value should be the same as that of the specified value in this standard.

1S 15476:2004

Indian StandardBAMBOO MAT CORRUGATED

SHEETS SPECIFICATION1 SCOPE

This standard covers the requirement of bamboo matcorrugated sheets ( BMCS ) for roofs of industrial,residential, agricultural, commercial and institutionaltypes of buildings.

2 REFERENCES

The standards listed in Annex A are necessary adjunctsto this standard.

3 TERMINOLOGY

3.1 For the purpose of this standard, the definitionsgiven in IS 707, IS 6874, 1S 13958 and the followingshall apply.

3.1.1 Bamboo

Bamboos are tall perennial grasses belonging to thefamily Poaceae and sub-family Bambusoidae.

3.1.2 Sliver

Slivers are thin uniform strips of bamboo processedfrom splits of bamboo culm.

3.1.3 Mat

Mat is a woven sheet in suitable geometric patternusing, slivers.

3.1.4 Bamboo Mat Corrugated Sheet

A sheet made up of adhesive soaked and coated matsassembled and pressed under specified temperatureand pressure to obtain sinusoidal or other suitablecorrugations.

3.1.5 Delamination

Inter-sliver separation within the mat or between themats.

4 MATERIALS

4.1 Bamboo

Any species of bamboo suitable for mat making maybe used for BMCS.

4.1.1 Bamboo Mats

Bamboo mats required for the manufacture of BMCSshall be compactly woven in suitable pattern fromslivers of uniform thickness and width. Thicknessof slivers shall be in the range of 0.6 mm to 0.8 mm

and with a minimum width of 5 mm. Care shall betaken to exc Iude the slivers with epidermal andendoderrnal layer.

4.1.2 Prophylactic Treatment

If the storage time including the time of transportationis one month or more, the mats shall be givenprophylactic treatment as per Group 9 in Table 2 of1S401 andlS 1902.

4.2 Adhesive

Resin for BMCS shall be ofphenolic type conformingto BWP grade specified in IS 848. For the outermostlayers of mats of BMCS, resin admixed with suitablefiller shall be used.

4.3 Preservative

Preservative treatment shall be given by incorporatingthe suitable preservatives like sodium pentachlorophenate into the resin before soaking the mats to protectagainst biodegradation.

5 MANUFACTURE

5.1 Application of Adhesive

Adhesive shall be applied by soaking the mats in theadhesive as explained in 4.2. A second coat ofadhesive shall be applied on the soaked and driedmats which are used as outer layers, using a mechanicalglue spreader.

5.2 Conditioning of Adhesive Coated Bamboo Mats

Adhesive coated mats shall be conditioned to bringdown the moisture content to 12+2 percent.

5.3 Hot Pressing

Assembled mats shall be hot pressed to obtain thespecified properties.

5.4 Conditioning of BMCS

Afier hot pressing the finished bamboo mat corrugatedsheet shall be stored at ambient conditions at leastfor 24 h.

6 DIMENSIONS AND TOLERANCES

6.1 The sheets shall conform to the dimensions andtolerances given in Table 1 and Fig. f.

6.1.1 Any other dimension as agreed to between themanufacturer and the purchaser may also be used.

1S 15476:2004

I

P ------+

T Y4 II

FIG.1 PITCHAND DEPIH OFCORRUGATED SHEETS

Table 1 Dimensions and Tolerances

( Clause 6.1 )All dimensions in millimetre.

Length Width Thickness Depth d Pitch of(n Corrugation Corrugation

(D) (P)

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

I 800 1050 3.8 30 1202 140 1050 3.8 30 1202 440 1050 3.8 30 120

Tolerances

* 10 mm + IOmm * 10 +2 * 2 mmmm

percent -o (see Note 3)NOTES

1 The. thickness of the sheets shall be taken as the average of six measurements and shall be measured randomly alongthe width (except at the valleys) with a suitable screw gauge.2 The depth of each of the six corrugations shall be measured randomly and the deviation in any of the cases measuredshall not exceed the limits. specified in Table 1. The depth shall be measured with suitable depth gauge.

3 Tolerances given for pitch of corrugation relate to measurement over six pitches. The total length over six pitchesshall be mentioned and it shall not vary from six times the specified pitch with tolerance.

4 Any alternate design of corrugation may be used as per agreement between the manufacturer and the purchaserprovided all requirements of this standard are met. In such cases the manufacturer shall specify the corrugation detailsincluding a section specifying thickness, depth and pitch and tolerance thereon.

7 FINISH

7.1 The faces of bamboo mat corrugated sheet shallbe reasonably smooth and uniform in colour.

7.2 The cut edge of sheet shall be given a brush coatingwith a suitable preservative and edge sealed withsuitable resin.

8 TESTS AND REQUIREMENTS8.1 Requirements

BMCS shall conform to the requirements given inTable 2 when tested in accordance with the provisiongiven in col 4 of Tab]e 2.9 SAMPLING AND CRITERIA FORCONFORMITY

9.1 Scale of Sampling

9.1.1 Lot

in any consignment, all the sheets of the same size2

and manufactured under similar conditions ofproduction shall be grouped together to constitute alot.

9.1.2 All the sheets in the lot shall be inspected forfinish requirements as given in 7. The defective sheetsshall be removed from the lot.

9.1.3 The lot shall then be examined for dimensionalrequirements. For this purpose, the number of sheetsto be selected at random from the lot shall be inaccordance with col 2 and 3 of Table 3.

9.1.3.1 These sheets shall be selected from the lotat random. In order to ensure the randomness of selection. the procedure given in IS 4905 may befollowed.

9.2 Criteria for Conformity

9.2.1 All the sheets selected in accordance withCOI2 and 3 of Table 3, shall be subjected to dimensional

- ...

IS 15476:2004

Table 2 Requirements of BMCS

( Clause 8.1 )S1 No. Properties Requirements Method of Test,

Ref to Annexof this Standard

(1) (2) (3) (4)

i) Density, g/cmii) Load bearing capacity, N/mm:

1) Dry state2) Wet state

iii) Impermeability

iv) Water absorption, Percent ( after24 h soaking )

v) Cyclic testvi) Resistance to falling weight

vii) Resistance to fire:l) Flame penetration2) Rate of burning3) Surface spread of flame,

maximum area of char in mmz

0.75, Mirr Bc

4.0, Min3.0, MinThe lower surface shall not show Dany formation of drops of waterexcept for traces of moisture15, Max E

No delamination FThe test piece shall not break or Gshow any crack or tear

H

Not less than 10 minNot less than 20 min4500

requirements. A sheet failing to satisfi this requirementshall be termed as defective. The lot shall be consideredas conforming to dimensional requirements, if thenumber of defective found in the sample is less thanor equal to the corresponding acceptance number givenin CO14 of Table 3; otherwise the lot shall be rejectedwithout further testing.

9.2.2 The lot which has been found as conformingto the dimensional requirements shall be tested as perTable 2. For this purpose, the sample size shall be inaccordance with co] 2 and 5 of Table 3.9.2.3 A lot shall be considered as conforming to therequirements of this standard, if 9.2.1 and 9.2.2 aresatisfied.

10 MARKING

10.1 Each bamboo mat corrugated sheet shall be legiblyand indelibly marked or stamped with the following:

a) Indication of the source of manufacture,b) Nominal dimensions,c) Year of manufacture, andd) Batch No.

10.1.1 All markings shall be done on the face of thesheet near one edge.

10,2 BIS Certification Marking

The bamboo mat corrugated sheet may also be markedwith Standard Mark.

10.2,1 The use of the Standard Mark is governed bythe provisions of Bureau of Indian Standards A et,1986 and the Rules and Regulations made there under.The details of conditions under which the licensefor the use of the Standard Mark maybe granted tothe manufacturers or producers maybe obtained fromthe Bureau of Indian Standards.

Table 3 Sample Size and Acceptance Number

( Clauses 9.1.3,9.2.1 and9.2.2 )S1 No. Lot Size Sample Size for Acceptance Sample Size

Dimensional Number for OtherRequirement Requirement

(1) (2) (3) (4) (5)i) up to 500 20 I 3

ii) 501 to 1000 32 2 5iii) 1001 to 3000 50 3 7iv) 3001 and above 80 5 10

3

IS 15476:2004

ANNEX A

( Clause 2 )LIST OF REFERRED INDIAN STANDARDS

IS No. Title

321:1964 Specification for absolute alcohol( revised)

401:2001 Preservation of timber Code ofpractice (fourth revision )

707:1976 Glossary of terms applicable to timbertechnology and utilization ( secondrevision )

848:1974 Specification for synthetic resinadhesives for plywood ( pnenolic

IS No. Title

and aminoplastic ) (first revision )1902:1993 Code of practice for preservation of

bamboo and cane for non-structuralpurposes ( fh-st revision )

4905:1968 Method of random sampling

6874:1973 Methods for tests for round bamboos

13958:1994 Bamboo mat board for generalpurposes Specification

ANNEX B

[ Table 2, S1 No. (i)]METHOD OF TEST AND CALCULATION OF DENSITY OF BMCS

B-1 SPECIMEN

Three test specimen each of size 300 mm x 300 mmshall be taken and preconditioned to a constant massat a relative humidity of65 + 5 percent and a temperatureof 27 k 2C.

B-2 PROCEDURE

After conditioning, each test specimen shall beweighed to an accuracy of 1 g. This is followed

by determination of dimension of specimen withregard to:

Thickness: average of 6 readings randomly takenexcepting val Iey portion;Length: average of 6 readings randomly taken;Width: average of 6 readings randomly taken. Theactual width is derived by multiplying with a factorof 1.3767 for sinusoidal corrugation and thereafterthe density is calculated.

ANNEX C

[ Table 2, SINO. (ii) ]LOAD BEARING CAPACITY TEST FOR BMCS

C-1 SPECIMEN

The full sheet shall be cut into two halves across thewidth, one half sheet shall be tested in dry state andthe other half in wet state ( after 24 h soaking in waterat ambient temperature).C-2 PROCEDURE

Each specimen shall be freely and evenly supportedon parallel rigid hardwood, cast iron or steel bearers50 mm wide and of a length at least as great as thewidth of the specimen, and set at right angles to thecorrugations as shown in Fig. 2. The bearers shall

be placed one meter from centre to centre. The sheetsshall be loaded at mid span by means of a self aligningrigid flat beam 230 + 5 mm wide, parallel to the supports.

Alternatively the test shall be carried out in UTM usingroller supports to the full width of the specimen. Theload shall be applied in increments of 20 kg at uniformrate not greater than 2000 N/rein.

C-3 REPORTING OF RESULT

The load at which the sheet breaks shall be recordedand the load, in N/mm, width of the specimen shallbe computed.

4

IS 15476:2004

FIG.2 LOAD REARINGCAPACITYTEST FORCORRUGATED SHEE-I

All dimensions in millimetres.

FIG. 3 PERMEABILITYTESTFORCORRUGATED SHEETS

ANNEX D

[ Table 2, SINO. (iii) ]TEST FOR IMPERMEABILITY

D-1 SPECIMEN

Thk test k carried out on a whole sheet with a minimumlength of 1.20 m, which has been kept for at least5 days in a controlled environment at a temperatureof 27 * 2C and relative humidity 65 * 5 percent.

D-2 PROCEDURE

A frame, the form and dimensions of which are givenin Fig, 3 shall be scaled on the test piece. After sealingthe frame onto the sheet, fill up with water until thelevel is 20 rnm above the top of the corrugations. Then

5

IS 15476:2004

place the whole assembly in a controlled environment reported to have passed the test, if drops of waterat 27 * 2C and at a relative humidity of 65 + 5 percent. are not formed at the lower surface of the sheets.

D-3 REPORTING OF RESULTSAppearance of the traces of moisture at the lowersurface is permissible.

Examine the under-face after 24 h. The specimen is

ANNEX E

[ Table 2, S1 No. (iv)]WATER ABSORPTION TEST

E-1 SPECIMEN

Three test specimens each of size 300 mm x 300 mmshall be taken and preconditioned to a constant massat a relative humidity of 65 * 5 percent and at temperatureof27 * 2c.

E-2 PROCEDURE

After conditioning, each test specimen shall beweighed to an accuracy of 0.1 g. Then specimen shallthen be submerged horizontally under 25 mm freshclean water maintained at a temperature of27 + 2C.

The test specimen shall be separated by at least15 mm from each other and from the bottom and sidesof the container. After 24 h submersion specimensshall be suspended to drain for 10 min at the end ofwhich time the excess surface water shall be removedand the specimen immediately weighed.

E-3 REPORTING OF RESULTS

The amount of water absorbed shall be calculated fromthe increase in mass of the specimen during thesubmersion, and the water absorption shall beexpressed as the percentage based on the initial mass.

ANNEX F

[ Table 2,,91 No. (v)]CYCLIC TEST

F-1 SPECIMEN 4 h and then dried for 16 h at a temperature of

Three test specimens each of size 150 mm x 150 mm 65+ 2C and then followed by 2 more cycles of boiling

shall be taken and preconditioned to a constant mass and drying under the same conditions describedabove.

at a relative humidity of 65 + 5 percent and attemperature of27 + 2C. F-3 REPORTING OF RESULTSF-2 PROCEDURE The specimens shall be examined for delamination afterSpecimens shall be submerged in boiling water for each cycle.

IS 15476:2004

ANNEX G

[ Table 2, S/ No. (vi)]FALLING WEIGHT TEST

G-1 SPECIMEN

This test is carried out on a whole sheet with a minimumlength of 1.20 m, which has been kept for at least5 days in a controlled environment at a temperatureof 27 + 20C and at a relative humidity of 65 + 5 percent.

G-2 APPARATUS

G-2.1 Shot put iron ball of weight 6.36 kg.

G-2.2 Straight tube of length 460 mm and of sufficientinternal dialmeter to easily drop the iron ball.

G-2.3 Plumb line which enables the ball to be aimedto strike the desired portion of the test piece.

G-2.4 Two purlins 1000 mm apart fixed to the rigidframe.

G-3 PROCEDURE

Fix the sheet rigidly to the purl ins. Drop the ball freelyfrom a height of 1.8 m, in such a way that it strikesthe sheet at the desired place. Repeat the test at least10 times to cover the entire area between two purl ins.The set up is shown in Fig. 4.

G-4 REPORTING OF RESULTS

The test piece shall not break or show any crack ortear.

4STEEL BALL

L

d

(636 kg)

\@

STRAIGHTTUBE

rADJUSTABLESTANDPu

FIG. 4 FALLINGWEIGHT TEST

1S 15476:2004

ANNEX H

[ Table 2, S1 No. (vii) ]RESISTANCE TO FIRE

H-O The following three fire resistance tests areintended to evaluate performance of BMCS againstits resistance to fire.

H-1 FLAME PENETRATION TEST

ii-1.l Specimen

Three test specimens each of size 125mm x 125 mmshall be taken and pre-condit ioned to a constant massat a relative humidity of65 + 5 percent and at temperatureof2!7* 2C.

H-1.2 Procedure

The test specimen is held horizontally 50 mm abovethe nozzle of blow-pipe/welding torch. In order to getcontinuous flame, a gentle flame of length around30 mm from another burner is needed as shown inFig, 5, The test specimen is rotated in horizontal plane75 rev/rein in such a way that the centre of the flamedescribes a circle of25 mm diameter.

GASBURNER

\

H-1.3 Reporting of Results

The time taken for the flame to penetrate the thicknessof BMCS is recorded.

H-2 RATE OF BURNING TEST

H-2.1 Specimen

Three test specimens shall be of the full thicknessof the material and size 100 mm x 12.5 mm. Thespecimen shall be pre-conditioned to a constantmass at a relative humidity of 65 + 5 percent and attemperature of27 * 2C.

H-2.2 Procedure

The test specimen is suspended in a fire tube andadjusted at a height of 30 mm from the flame of theburner as shown in Fig. 6. The test specimen is ignitedby a standardized gas flame and time taken for each10 percent loss in mass is recorded.

P LECTRIC MOTOR

SPECIMEN

Y

HOLDER

FSPECIMENLAMEWELDING TORCHOR BLOW PIPExOMPRESSED) AIRCOOKING GAS

FIG.5 SCHEMATICDIAGRAM FORFLAME PENETRATIONTEST

8

IS 15476:2004

ALUMINIUM

YPIPE

rLAMEAS BURNERI I -r fimn Ah,

FIG. 6 SCHEMATICDIAGRAMFORRATEOFBURNINGTEST

H-2.3 Reporting of Results

The time taken from 30 percent to 70 percent loss inmass is recorded.

H-3 TEST FOR SURFACE SPREAD OF FLAME

H-3. 1 Apparatus and Materials

H-3. 1.1 Specimen Support

Suitable means shall be provided for supporting thespecimen during the test at an angle of45, with theupper and lower edges of the plane of support beinghorizontal. This may be accomplished by resting thespecimen on four points; but it is necessary, whatevermethod of support be employed, that:

a) Central portion of the specimen shall not beshielded from the flame,

b) Support shall not prevent access of air forcombustion, and

c) Apparatus shall be such that the progressof the test can be observed. A suitableapparatus is shown in Fig. 7.

H-3. 1.2 Flame Support

A flat bottom cup of 22 mm internal diameter and7 mm depth shall be placed on a support. The cupshall be made of sheet iron about 0.8 mm thick. It shallbe supported so that the centre of its base is 25 mm

*

vertically below the crown portion of the test specimen,75 mm from its lower horizontal edge, and midwaybetween the inclined edges.

H-3.1.3 Alcohol

Absolute ethyl alcohol confirming to IS 321.

H-3.2 Specimen

Three test specimens each of size 300 mm x 300 mmshall be taken and pre-conditioned to a constant massat a relative humidity of 65 + 5 percent and at temperatureof 27 * 2c.

H-3.3 Procedure

H-3.3.1 Place the specimen on the test apparatus asdetailed in H-3.1.2. Pipette 1 ml of absolute ethylalcohol into the cup. Ignite the alcohol in the cup( with the test specimen in place ) by a suitable smallsource of flame, which shall be removed as soon asthe alcohol is ignited. The cup shall be at roomtemperature before each test.

M-3.3.2 One minute after the fuel had been exhausted,extinguish any flame/glow on the specimen. Calculatethe area of char by measuring the length of char (a)and projected width of the charred curved surface (b)in mm using the following formula ( see Fig. 7 ) :

nabArea of char =

49

HORIZONTAL

ASUPPORTTO

20 --I ~ SPECIMEN

o

0.8mm THICK

\CUP

II!15

1.

. SUPPORT TO NSPECIMEN

CUP STAND20X 20 WOODEN

SECTION~

PIAN DETAILS OF CUP STAND

r SPECIMEN

/ SUPPORT TOecf.,. .-I

L- f

. .

4F

. IN

It I n

SECTIONAL ELEVATION

kaASECTIONAL VIEW AT YY

DETAILS OF CHARRED AREA

\/u5d - L---, sl--l tU20 x20VERTICALWOODENsuppoRT $

SIDE VIEW FRONT VIEW ISOMETRIC VIEW

All dimensions in millimetres.

FIG. 7 TESTINGBMCS FORSURFACESPREADOFFLAME

.--L.-A

IS 15476:2004

I

ANNEX J( Foreword)

COMMITTEE COMPOSITION

Wood and Other Lignocellulosic Products Sectional Committee, CED 20

Organization

Indian Plywood Industries Research and Training Institute, Bangalore

All lnditr Agro-Board Association, Pune

Building Materials & Technology Promotion Council, New Delhi

Central Building Research Institute, Roorkee

Central Public Works Department, New Delhi

Civil Aviation Department ( Technical Centre ), New Delhi

Coir Board, Bangalore

Council of Architecture, New Delhi

Directorate General of Supplies and Disposals, Hyderabad

Directorate of Standardization, New Delhi

Engineer-in-chiefs Branch, New Delhi

Federation of Indian Plywood and Panel Industry, New Delhi

Forest Research Institute, Debra Dun

[ndiarr Academy of Wood Science, Debra Dun

Indian Plywood Industries Research and Training Institute,Bangalore

Institute of Wood Science and Technology, Barrgalore

Jolly Board, Mumbai

Kutty Flush Door and Furniture Co Pvt Limited, Chennai

Tilmpack Pvt Limited, Byrnihat

Mangalam Timber Products Limited, Barrgalore

Ministry of Defence ( DGQA ), Kanpur

Ministry of Defence ( R & D ), New Delhi

Representative(s)DR C. N. PANDEY (Chairman)

SHRI V. S. RAWRIiPRI:SHNTATIVE( Alternate )

SHRI J. K. PRASADSHKI A. K. TIWARI ( Ahernate )

DR Y. SINCiHDR L. K. AGARWAL( Alternate )

SHRI &rRriwMiRKUMARSURIS. K. VERMA( Alternate )

SHRI B. V. JOSHISHRI N. M. WALECHA ( Alternate )

JOINT DIRIXTCNI

REPRESENTATIVE

SHRI M. GANCiA~ANJ

DR ( SHtUMATI) INDU GOPTASHRI G. K. SHARMA ( Alternate )

SHIUMATI MIXNAKSHISHRthmTl AMITA RAI ( Alternate )

SHRI JAYADIXP CHITLANGIASHRI S. P. GOENKA ( A1~ernate )

DIRIXTORREPRESENTATIVE( Alternate )

SIKKFiTARYJOINT SMXETARY ( Alternate )

SHRI K. SHYAMASUNDARSHRI S. PAVMANABHAN( Alternate )

DR K. S. RAO

SHRI ARVIND JOLLYSHRI P. K. DAS GUPTA ( Alternate )

Cm Y. G. KRISHNAN

RIWRRSENTATIVI;

SHRI K. SRIUHARSHRI ANIL TALWAR( Alternate )

SHRI RAM CHANDRASHRI J. K. SINHA ( Alternate )

SHIU RAVINtNiti KOMAR

11

IS 15476:2004

Organization

Ministry of Railways, Lucknow

National Test House ( ER ), Kolkata

Northern India Plywood Manufacturers Association, Jalandhar

Novopan India Limited, Hyderabad

Nuchem Limited. New Delhi

Permalli Wallace Limited, Bhopal

The South Indian Plywood Manufacturers Association, Chennai

The Western India Plywood Limited, Cannanore

In personal capacity ( H. Na. 12, HIG, Ist Stage, K.H.B. Colony,Basaveshwara Nagar, Bangalore 560079 )

BIS Directorate General

Representative(s)

DIRK!TOR STANDARDS( CARRIACiE)Asstsmwr DIRUCTOii ( Alternate )

SHRI D. K. KANUNCiOER RAJINDER KAPUR ( Alternate )

SHtU N. K. TIWARISHRI ANIL GOEL ( Alternate )

SHRI S. A. NAQUISHRI A. V. V. RAGHAVACHARYA( Alternate)

SHRI Suorw BA~ARSHRIPRAVEENKUMAR( Alternate )

SHM S. K. KADESIASHRI B. S. PARMAR ( Alternate )

SHRIK. SANKARAKRISHNAN

SHRI P. K. MOHAMED

SHRI S. S. ZOOLAGUD

SHRIS. K. JAIN,Director & Head ( CED )[ Representing Director General ( ,!k-officio ) ]

Member SecretarySHRI J. C. ARORA

Director ( CED ), BIS

12

Bureau of Indian Standards

B 1S is a statutory institution established under the Bureau of Indian Standard$ Act, 1986 to promoteharmonious development of the activities of standardization, marking and quality certification of goods andattending to comlected matters in the country.

Copyright

131Shas the copyright of all its publications. No part of these publications maybe reproduced k any form withoutthe prior permission in writing of BIS. This does not preclude the free use, in the course of implementing thestandard, of necessary details, such as symbols and sizes, type or grade designations. Enquiries relating tocopyright be addressed to the Director (Publications), BIS.

Review of Indian Standards

Amendments are issued to standards as the need arises on the basis of comments. Standards are also reviewedperiodical Iy; a standard along with amendments is reaffirmed when such review indicates that no changes areneeded; if the review indicates that changes are needed, it is taken up for revision. Users of Indian Standardsshould ascertain that they are in possession of the latest amendments or edition by referring to the latest issueof BIS Catalogue and Standards : Monthly Additions.

This Indian Standard has been developed from Doc :No. CED20(7186 ).

Amendments Issued Since Publication

Amend No. Date of Issue Text Affected

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Manak Bhavan, 9 Bahadur Shah Zafar Marg, New Delhi 110002Telephones: 23230131,23233375,2323 9402

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Title PageForeword1. Scope2. References3. Terminology4. Materials5. Manufacture6. Dimensions and TolerancesFig. 1Table 1

7. Finish8. Tests and Requirements9. Sampling and Criteria for ConformityTable 2

10. MarkingTable 3

Annex AAnnex BAnnex CFig. 2Fig. 3

Annex DAnnex EAnnex FAnnex GFig. 4

Annex HFig. 5Fig. 6Fig. 7

Annex J