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IS : 12049 - 1987(Reaffirmed 2001) Edition 1.3 (2003-03) Indian Standard DIMENSIONS AND TOLERANCES RELATING TO WOOD BASED PANEL MATERIALS (Incorporating Amendment Nos. 1, 2 & 3) UDC 691.116 : 674.816-41 © BIS 2003 BUREAU MANAK BHAVAN , 9 BAHADUR SHAH ZAFAR MARG NEW DELHI 110002 OF INDIAN STANDARDS Price Group 3 P. KADERKUTTY Western India Plywood Limited. Indurpuri. . New Delhi SHRI P. MOTAYED Calcutta SHRI N. MEHTA ( Alternate ) Ministry of Railways (RDSO). SINGH (RTD) ( Alternate ) Plywood Manufacturers’ Association of West Bengal. B. Calcutta SHRI B. CHANDRASEKHAR Directorate General of Civil Aviation. Baliapatam Ministry of Defence (R & D) SHRI U. R. NAYER Indian Academy of Wood Science. S. MOTAYED ( Alternate ) Ministry of Defence (DGI) SHRI D. New Delhi CHIEF CONSERVATOR OF FORESTS Forest Department. Dandoli LT-COL G. R. K. SHRI L. R. GHOSH SHRI J. M. Purushotham DR SATISH KUMAR ( Alternate ) ( Continued on page 2 ) © BIS 2003 BUREAU OF INDIAN STANDARDS This publication is protected under the Indian Copyright Act (XIV of 1957) and reproduction in whole or in part by any means except with written permission of the publisher shall be deemed to be an infringement of copyright under the said Act. M. Chachan ( Alternate ) In personnal capacity ( C-59.IS : 12049 . SINHA ( Alternate ) INDUSTRIAL ADVISER Directorate General of Technical Development. KANCHAN SHRI B. Government of Assam. Representing Indian Plywood Bangalore Industries Research Institute. New Delhi ) DR A. M. Ganapathy ) National Test House.1987 Indian Standard DIMENSIONS AND TOLERANCES RELATING TO WOOD BASED PANEL MATERIALS Wood Products Sectional Committee. K. BDC 20 Chairman DR P. B. Guwahati Federation of Indian Plywood and Panel Industry. Dharwad DR A. MEHTA ( Alternate ) SHRI K. N. LAULY Indian Plywood Manufacturing Co Ltd. B. SHRI M. GANAPATHY Members SHRI V.I) SHRI A. DOKANIA New Delhi SHRI M. C. SINVANANDA ( Alternate to Dr P. N. V. Bansal SHRI P. Lucknow JOINT DIRECTOR STANDARDS (CARRIAGE . Roorkee SHRI L. BIS ( Ex-officio Member ) SHRI G.IS : 12049 . R. Sitapur SHRI H. RAMAN. N. Trivandrum SHRI JOSEPH K. New Delhi MAJ D. SEN GUPTA ( Alternate ) SHRI P. New Delhi SHRI J. New Delhi SUPERINTENDING SURVEYOR OF WORKS (NZ) SURVEYOR OF WORKS (NZ) ( Alternate ) Sitapur Plywood Manufacturers Ltd. K. RAMACHANDRAN Representing South Indian Plywood Manufacturers’ Association. Dehra Dun Indian Tea Association. SINGH Central Building Research Institute (CSIR). Tinsukhia Forest Research Institute and Colleges (Timber SHRI S.1987 ( Continued from page 1 ) Members SHRI A. Calcutta SECRETARY Directorate General of Supplies and Disposals. KOHLI ( Alternate ) SHRI S. RAO National Buildings Organization. Army Headquarters. V. SHRI SHARAN SINGH New Delhi DR Y. SANGANERIA Assam Plywood Manufacturers’ Association. R. SANYAL Mechanics Branch). AGARWAL ( Alternate ) Central Public Works Department. K. R. KURIAN ( Alternate ) DR A. THOMSON Director General. K. DIRECTOR (Civ Engg) Secretary SHRI P. SATYANARAYANA Assistant Director (Civ Engg). BIS 2 . RIGHSINGHANI Engineer-in-Chief’s Branch. 1 This Indian Standard was adopted by the Bureau of Indian Standards on 28 May 1987. The number of significant places retained in the rounded off value should be the same as that of the specified value in this standard. shall be rounded off in accordance with IS : 2 .1960*. 3 (March 2003). interchangeability and minimizes wastage. F O R E W O R D 0.0 For the purpose of this standard. 2 (October 1992) and Amendment No. after the draft finalized by the Wood Products Sectional Committee had been approved by the Civil Engineering Division Council. 1 (May 1990). blockboard. 1. tolerances and method of measurement for wood based panel materials.2 The effective utilization of wood based panel materials calls for rationalization of their dimensions which brings in uniformity. observed or calculated. 0. hard-board. 0. particle board. veneered particle board. particle board for insulation and high density particle board which are covered in various Indian standard specifications given in Appendix A. such as length. width and thickness. 2. SCOPE 1.1 This standard covers the dimensions. expressing the result of a test or analysis. recommending various dimensions of wood based panel products and the tolerances with which these measurements are to be taken. 0.3 This edition 1. fibre insulation board. the final value. 1.3 incorporates Amendment No.2 The wood based panels considered are plywood.4 For the purpose of deciding whether a particular requirement of this standard is complied with. With this in view. *Rules for rounding off numerical values ( revised ). Side bar indicates modification of the text as the result of incorporation of the amendments. this standard has been brought out to guide the industry. Amendment No. TERMINOLOGY 2. †Glossary of terms applicable to timber technology and utilization ( second revision ). 3 . the definitions given in IS : 707 1976† shall apply.1987 Indian Standard DIMENSIONS AND TOLERANCES RELATING TO WOOD BASED PANEL MATERIALS 0.IS : 12049 . 3.2 Hardboard 3. the second width and the third thickness.1.2.2.1 Size — Hardboards shall be of the sizes specified below : Length Width mm mm 4 800 3 600 3 000 2 400 2 100 2 100 1 800 1 800 1 200 × × × × × × × × × 1 200 1 200 1 200 1 200 1 200 900 1 200 900 1 200 3.1.1 Size — Plywood panels shall be of the sizes specified below : Length Width mm mm 2 400 × 1 200 2 100 × 1 200 2 100 × 900 1 800 × 1 200 1 800 × 900 3. blockboard and veneered particle board. the dimension parallel to the grain of the face is taken as the length.1 The first dimension shall represent the length.1987 2.3.2 Thickness — The thicknesses shall be as given in the specification listed in A-1. In the case of plywood.1 Size — Blockboards shall be of the sizes specified below: 4 .IS : 12049 .1 Plywood 3.2.1. 3. DIMENSIONS 3.3 Blockboard 3. 3.2 Thickness — The thicknesses shall be as given in the specifications listed in A-1. IS : 12049 .4.2 Thickness — The thicknesses shall be as given in the specification listed in A-1.4 Fibre Insulation Board 3.1 Size — Fibre insulation boards shall be of the sizes specified below: Length Width mm mm 3 600 × 1 200 3 000 × 1 200 2 400 × 1 200 2 100 × 1 200 2 100 × 900 1 800 × 1 200 1 800 × 900 3. 3.4.5.2 Thickness — The thicknesses shall be as given in the specification listed in A-1.4.5 Wood Particle Board (Medium Density) and Prelaminated Particle Board 3.1987 Length mm 2 400 2 100 2 100 1 800 1 800 Width mm 1 200 1 200 900 1 200 900 × × × × × 3.3.3.1 Size — Wood particle boards (medium density) and prelaminated particle boards shall be of the sizes specified below: Length Width mm mm 4 800 × 1 800 3 600 × 1 200 3 000 × 1 800 3 000 × 1 200 2 400 × 1 800 2 400 × 1 200 2 100 × 1 200 2 100 × 900 1 800 × 1 800 1 800 × 1 200 1 800 × 900 5 . 3. 3.2 Thickness — The thicknesses shall be as given in the specification listed in A-1.5.7 Particle Board for Insulation 3.1 Size — Veneered particle boards shall be of the sizes specified below: Length mm 2 400 2 100 2 100 1 800 1 800 Width mm 1 200 1 200 900 1 200 900 × × × × × 3.1 Size — Particle boards for insulation shall be of the sizes specified below: Length mm 2 400 2 100 2 100 1 800 1 800 Width mm 1 200 1 200 900 1 200 900 × × × × × 3.7.5. 3.7.1 Size — Wood particle boards (high density) shall be of the sizes specified below: Length mm 2 400 2 100 2 100 1 800 1 800 Width mm 1 200 1 200 900 1 200 900 × × × × × 6 .2 Thickness — The thicknesses shall be as given in the specification listed in A-1.6.6 Veneered Particle Board 3.7.8. 3.8 Wood Particle Board (High Density) 3.6.6.IS : 12049 .2 Thickness — The thicknesses shall be as given in the specification listed in A-1.1987 3. 4.4 Variation in Thickness on a Board Thickness variation between any two points on a board shall not be more than 0.5 mm.1 The following tolerances for the dimensions shall be permitted. MEASUREMENT 5. 1 MEASURING PLACES FOR LENGTH AND WIDTH 7 . 4. TOLERANCES 4.2 Thickness — The thicknesses shall be as given in the specification listed in A-1. 4.3 Squareness — 2 mm per 1 000 mm 4.1 Length and Width — The length and width of the panel shall be measured at two positions as shown in Fig.IS : 12049 .1 Length + 6 mm – 0 mm 4.2 Width + 3 mm – 0 mm 4.8.1.1987 3.3 Thickness — The tolerance on thickness shall be as given in the specification listed in A-1.1.1. 1.8. 5. parallel to and 100 mm FIG.2 Edge Straightness — 2 mm per 1 000 mm 4. veneered particle board. namely. 5. The pressure applied to the slide calipers during measurement shall be contact pressure. hardboard. plywood. 2 MEASURING PLACES FOR THICKNESS APPENDIX A ( Clause 1.2 ) SPECIFICATIONS CONCERNING WOOD BASED PANELS A-1. particle board for insulation. blockboard.2 Thickness — The thickness of the panel shall be measured at the middle points of each side at least 5 mm from the cut edge as shown in Fig. FIG. 2.IS : 12049 . to an accuracy of 0. wood particle board (high density) for which reference is made in this specification. fibre insulation board. using a slide calipers.02 mm and their average shall be taken as the thickness of the panel. wood particle board (medium density).1987 from the edges using a metre scale or a tape to an accuracy of 1 mm and their average shall be taken as the length and width of the panel. 8 . are listed below. All specifications concerning wood based panels. 9 .8 Specifications Covering Wood Particle Boards (High Density) — IS : 3478-1976 High density wood particle boards.5 Specifications Covering Wood Particle Boards (Medium Density) — IS : 3087-1985 Wood particle boards (medium density) and IS : 12823-1990 Prelaminated particle boards (under print).1987 A-1. A-1. A-1. k) IS : 5539-1969 Preservative treated plywood. e) IS : 3513 (Parts 1 to 3)-1989 Specification for resin treated compressed wood laminates (compregs) ( first revision ) f) IS : 4834-1968 Veneered wood boards for packing cases. following a) IS : 303-1989 Specification for plywood for general purposes ( third revision ) b) IS : 709-1974 Medium strength aircraft plywood.4 Specifications Covering Fibre Insulation Boards — IS : 3348-1965 Fibre insulation boards.1 Specifications Concerning Plywood—The specifications cover different varieties of plywood.6 Specifications Covering Veneered Particle Boards — IS : 3097-1980 Specification for veneered particle boards ( first revision ). c) IS : 710-1976 Marine plywood.IS : 12049 .7 Specifications Covering Particle Boards for Insulation — IS : 3129-1985 Low density particle boards ( first revision ). A-1.3 Specifications Covering Blockboards — IS : 1659-1990 Specification for blockboards ( third revision ).2 Specifications Covering Hardboards — IS : 1658-1977 Fibre hardboards ( second revision ). g) IS : 4859-1968 High strength aircraft plywood. h) IS : 4990-1993 Plywood for concrete shuttering work — Specification j) IS : 5509-1980 Fire retardant plywood. m) IS : 7316-1974 Decorative plywood with plurality of veneers. A-1. A-1. d) IS : 1328-1982 Veneered decorative plywood. A-1. A-1. CHENNAI 600113 Western : Manakalaya. T. 323 94 02 Regional Offices: Central Eastern : Manak Bhavan. 337 85 61   337 86 26. I. BIS. BHOPAL. HYDERABAD. LUCKNOW. GUWAHATI. NAGPUR. Enquiries relating to copyright be addressed to the Director (Publications). of necessary details. type or grade designations. This Indian Standard has been developed by Technical Committee : BDC 20 and amended by CED 20 Amendments Issued Since Publication Amend No. it is taken up for revision. RAJKOT. E9 MIDC. GHAZIABAD. JAIPUR. 1 Amd. Telephones: 323 01 31. marking and quality certification of goods and attending to connected matters in the country. FARIDABAD. NALAGARH. PUNE. V. 235 04 42   235 15 19. Scheme VII M. T. 832 78 58   832 78 91. 235 23 15  832 92 95. Marol. Standards are also reviewed periodically. No. Campus. COIMBATORE.Bureau of Indian Standards BIS is a statutory institution established under the Bureau of Indian Standards Act. THIRUVANANTHAPURAM. 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 Catalogue’ and ‘Standards : Monthly Additions’. PATNA. 1986 to promote harmonious development of the activities of standardization. Andheri (East) MUMBAI 400093 BANGALORE. IV Cross Road. This does not preclude the free use. 9 Bahadur Shah Zafar Marg. such as symbols and sizes. Road. P. a standard along with amendments is reaffirmed when such review indicates that no changes are needed. 337 91 20  60 38 43   60 20 25  235 02 16. 3 Date of Issue May 1990 October 1992 March 2003 BUREAU OF INDIAN STANDARDS Headquarters: Manak Bhavan. Kankurgachi KOLKATA 700054 Telegrams: Manaksanstha (Common to all offices) Telephone  323 76 17   323 38 41  337 84 99. 832 78 92 Northern : SCO 335-336. No part of these publications may be reproduced in any form without the prior permission in writing of BIS. CHANDIGARH 160022 Southern : C. No. Branches : AHMEDABAD. 9 Bahadur Shah Zafar Marg NEW DELHI 110002 : 1/14 C. New Delhi 110002. I. KANPUR. 2 Amd. No. in the course of implementing the standard. BHUBANESHWAR. if the review indicates that changes are needed. I. Review of Indian Standards Amendments are issued to standards as the need arises on the basis of comments. Sector 34-A. 323 33 75. Copyright BIS has the copyright of all its publications. Amd. VISHAKHAPATNAM .