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BRITISH STANDARD Round and sawn timber Ð Permitted deviations and preferred sizes Ð Part 2: Hardwood sawn timber The European Standard EN 1313-2:1998 has the status of a British Standard ICS 79.040 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW | BS EN | | | 1313-2:1999 | | | | Incorporating | Corrigendum No | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BS EN 1313-2:1999 National foreword This British Standard is the English language version of EN 1313-2:1998, including corrigendum August 2000 It supersedes BS 5450:1977 which is withdrawn The UK participation in its preparation was entrusted by Technical Committee B/543, Round and sawn timber, to Subcommittee B/543/2, Sawn timber, which has the responsibility to: Ð aid enquirers to understand the text; Ð present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; Ð monitor related international and European developments and promulgate them in the UK A list of organizations represented on this subcommittee can be obtained on request to its secretary National annex NA (informative) contains the recommended reduction of sawn hardwood by processing Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled ªInternational Standards Correspondence Indexº, or by using the ªFindº facility of the BSI Standards Electronic Catalogue Informative reference BS 5756:1997, Specification for visual strength grading of hardwood A British Standard does not purport to include all the necessary provisions of a contract Users of British Standards are responsible for their correct application Compliance with a British Standard does not of itself confer immunity from legal obligations Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages to 4, an inside back cover and a back cover The BSI copyright notice displayed in this document indicates when the document was last issued This British Standard, having been prepared under the direction of the Sector Committee for Building and Civil Engineering, was published under the authority of the Standards Committee and comes into effect on 15 March 1999 BSI 08-2000 ISBN 580 32079 Amendments issued since publication Amd No Date Text affected 10981 August 2000 Indicated by a sideline Corrigendum No EN 1313-2 EUROPEAN STANDARD NORME EUROPÊENNE EUROPẰISCHE NORM November 1998 ICS 79.040 Incorporating corrigendum June 1999 Descriptors: wood, sawlogs, sawn timber, hardwood, dimensional deviations, dimensional stability, humidity, dimensions English version Round and sawn timber Ð Permitted deviations and preferred sizes Ð Part 2: Hardwood sawn timber Bois ronds et bois scieÂs Ð Ecarts admissibles et dimensions preÂfeÂrentielles Ð Partie 2: Bois scieÂs feuillus Rund- und Schnittholz Ð ZulaÈssige Abweichungen und Vorzugsmaûe Ð Teil 2: Laubschnittholz This European Standard was approved by CEN on November 1998 CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member This European Standard exists in three official versions (English, French, German) A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom CEN European Committee for Standardization Comite EuropeÂen de Normalisation EuropaÈisches Komitee fuÈr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1998 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members Ref No EN 1313-2:1998 E Page EN 1313-2:1998 Foreword This European Standard has been prepared by Technical Committee CEN/TC 175, Round and sawn timber, the Secretariat of which is held by AFNOR This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by May 1999, and conflicting national standards shall be withdrawn at the latest by May 1999 According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom This standard is one of two concerning permitted deviations and preferred sizes of sawn timber The other standard is: EN 1313-1, Round and sawn timber Ð Permitted deviations and preferred sizes Ð Part 1: Softwood sawn timber Contents Foreword Scope Normative references Definitions Moisture content Change in size due to changes in moisture content Permitted deviations Preferred sizes Annex A (informative) Complementary national sizes Page 3 3 3 BSI 08-2000 Page EN 1313-2:1998 Scope Permitted deviations This European Standard specifies permitted deviations and preferred sizes of European hardwood sawn timber at a moisture content of 20 % For a specified number of pieces of hardwood sawn timber of the same target thickness and/or width, the average thickness and/or width shall not be less than the target thickness and/or width If the timber is for structural use, the permitted deviations shall be those specified in EN 336 The permitted deviations, at a moisture content of 20 %, are the following Normative references This European Standard incorporates, by dated or undated reference, provisions from other publications These normative references are cited at the appropriate places in the text and the publications are listed hereafter For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision For undated references, the latest edition of the publication referred to applies EN 336, Structural timber Ð Coniferous and poplar Ð Sizes, permissible deviations EN 844-1, Round and sawn timber Ð Terminology Ð Part 1: General terms common to round timber and sawn timber EN 844-3, Round and sawn timber Ð Terminology Ð Part 3: General terms relating to sawn timber EN 844-4, Round and sawn timber Ð Terminology Ð Part 4: Terms relating to moisture content EN 844-6, Round and sawn timber Ð Terminology Ð Part 6: Terms relating to dimensions of sawn timber EN 1309-1, Round and sawn timber Ð Method of measurement of dimensions Ð Part 1: Sawn timber prEN 13183-1, Round and sawn timber Ð Method of measurement of moisture content Ð Part 1: Method for determining moisture content of a piece of sawn timber (Oven-dry method) prEN 13183-2, Round and sawn timber Ð Method of measurement of moisture content Ð Part 2: Method for estimating moisture content of a piece of sawn timber (Electrical method) Definitions For the purposes of this standard, the definitions contained in EN 844-1, EN 844-3, EN 844-4 and EN 844-6 apply Moisture content The measurement of moisture content shall be carried out according to prEN 13183-1 or prEN 13183-2 The reference moisture content is 20 % Change in size due to changes in moisture content Unless there is evidence to the contrary, it is assumed that the thickness and width of a piece of timber will increase by 0,25 % for every % of moisture content higher than 20 % up to 30 %, and will decrease by 0,25 % for every % of moisture content lower than 20 % The above values are independent of the species BSI 08-2000 6.1 On thicknesses (t) | | t # 32 mm: 21 mm, +3 mm t > 32 mm: 22 mm, +4 mm The permitted deviations of thicknesses apply to all thicknesses, not only to preferred ones 6.2 On widths (b) b # 100 mm: 100 mm < b # 200 mm: b > 200 mm: 22 mm, +6 mm 23 mm, +9 mm 24 mm, +12 mm 6.3 On lengths (l) Ð For unedged timber and boules: Ð For square edged timber: 0, +3 % of the target length but no more than 90 mm 0, +3 % of the target length but no more than 90 mm Preferred sizes Sizes are measured according to EN 1309-1 at a moisture content of 20 % 7.1 Preferred thicknesses 20 mm, 27 mm, 32 mm, 40 mm, 50 mm, 60 mm, 65 mm, 70 mm, 80 mm and 100 mm 7.2 Preferred widths 10 mm intervals for widths between 50 mm and 90 mm 20 mm intervals for widths of 100 mm or more 7.3 Preferred lengths For unedged timber and boules: 0,10 m intervals for lengths between 2,00 m and 6,00 m For square edged timber: 0,05 m intervals where l # 1,00 m 0,10 m intervals where l > 1,00 m | Page EN 1313-2:1998 Annex A (informative) Complementary national sizes Complementary preferred sizes in Germany (DE) Thicknesses (in millimetres): 18 22 Thickness of the board for all standardized pallets 24 Standardized thickness of the industrial packages 25 30 35 45 52 63 78 Thickness of the blocks for all the standardized pallets Width (in millimetres): 145 Width of the boards in standardized pallets, especially in Euro-pallets Complementary preferred sizes in the United Kingdom (GB) Thicknesses (in millimetres): 19, 26, 38, 52, 63, 75 Complementary preferred sizes in Ireland (IR) Thicknesses (in millimetres): 25, 38, 63, 75 Complementary preferred sizes in Italy (IT) Width (in millimetres): 250 Complementary preferred sizes in the Netherlands (NL) Thicknesses (in millimetres): 15, 18, 26, 34, 41, 45, 52, 54, 63, 75 Complementary preferred sizes in Norway (NO) Widths (in millimetres): 63, 75, 125, 150, 250 Complementary preferred sizes in France (FR) Thicknesses (in millimetres): 35, 55 BSI 08-2000 BS EN 1313-2:1999 National annex NA (informative) Reduction of sawn hardwoods by processing NA.1 General Processing of hardwoods to accurate finished sizes involves reductions in size which vary with the size, the process and the product The figures in Table NA.1 have been established in the United Kingdom as being economic, workable and not wasteful NA.2 Reductions The recommended reductions appropriate to some end uses and products appear in Table NA.1 Any finished sizes in British Standards covering particular hardwood products and components will take precedence over those in Table NA.1 For other end uses not specifically mentioned, the same figures as those for one of the end uses listed may be adopted Intermediate figures would be unlikely to achieve any greater accuracy and would tend to confuse If the timber is for structural use, the reduction limits specified in BS 5756 apply NA.3 Permitted deviations For all finished sizes after processing, permitted deviations of ±0,5 mm are recommended If the timber is for structural use, the permitted deviations specified in BS EN 336 apply Table NA.1 Ð Recommended reductions from sawn size to finished target size by processing of two opposite faces Dimensions in millimetres Reduction from sawn size to finished target size End use or product For target sizes of width or thickness 15 to 25 Floorings, matchings and interlocked boarding and planed all round Trim Joinery and cabinet wood BSI 08-2000 26 to 50 51 to 100 101 to 150 151 to 300 7 7 10 12 10 14 BS EN 1313-2:1999 BSI 389 Chiswick High Road London W4 4AL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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