BS EN 1313-2-1999 Round and sawn timber - Permitted deviations and preferred sizes - Hardwood sawn timber《圆形木材和锯材 允许偏差和优选尺寸 硬木锯材》.pdf

1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 1313-2:1999 Incorpo

2、rating Corrigendum No. 1 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 Round and sawn timber Permitted deviations and preferred sizes Part 2: Hardwood sawn timberBS EN 1313-2:1999 This Briti

3、sh 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 0 580 32079 0 Amendments issued since publication Amd. No. Date Text

4、affected 10981 Corrigendum No. 1 August 2000 Indicated by a sideline. 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 It supersedes BS 5450:1977 which is withdrawn.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

5、Technical Committee B/543, Round and sawn timber, to Subcommittee B/543/2, Sawn timber, which has the responsibility to: aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informe

6、d; 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-ref

7、erences 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 “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Cat

8、alogue. 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 d

9、oes 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 2 to 4, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last is

10、sued.CEN European Committee for Standardization Comite Europe en de Normalisation Europa isches Komitee fu r 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-

11、2:1998 E EUROPEAN STANDARD EN 1313-2 NORME EUROPE ENNE EUROPA ISCHE 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 Permitted

12、 deviations and preferred sizes Part 2: Hardwood sawn timber Bois ronds et bois scie s Ecarts admissibles et dimensions pre fe rentielles Partie 2: Bois scie s feuillus Rund- und Schnittholz Zula ssige Abweichungen und Vorzugsmae Teil 2: Laubschnittholz This European Standard was approved by CEN on

13、8 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

14、 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 Cent

15、ral 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 Kingdo

16、m.Page 2 EN 1313-2:1998 BSI 08-2000 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 te

17、xt 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,

18、 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 standar

19、d is: EN 1313-1, Round and sawn timber Permitted deviations and preferred sizes Part 1: Softwood sawn timber. Contents Page Foreword 2 1 Scope 3 2 Normative references 3 3 Definitions 3 4 Moisture content 3 5 Change in size due to changes in moisture content 3 6 Permitted deviations 3 7 Preferred si

20、zes 3 Annex A (informative) Complementary national sizes 4Page 3 EN 1313-2:1998 BSI 08-2000 1 Scope This European Standard specifies permitted deviations and preferred sizes of European hardwood sawn timber at a moisture content of 20 %. 2 Normative references This European Standard incorporates, by

21、 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 Stand

22、ard 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 Coniferous and poplar Sizes, permissible deviations. EN 844-1, Round and sawn timber Terminology Part 1: General terms common to rou

23、nd timber and sawn timber. EN 844-3, Round and sawn timber Terminology Part 3: General terms relating to sawn timber. EN 844-4, Round and sawn timber Terminology Part 4: Terms relating to moisture content. EN 844-6, Round and sawn timber Terminology Part 6: Terms relating to dimensions of sawn timbe

24、r. EN 1309-1, Round and sawn timber Method of measurement of dimensions Part 1: Sawn timber. prEN 13183-1, Round and sawn timber Method of measurement of moisture content Part 1: Method for determining moisture content of a piece of sawn timber (Oven-dry method). prEN 13183-2, Round and sawn timber

25、Method of measurement of moisture content Part 2: Method for estimating moisture content of a piece of sawn timber (Electrical method). 3 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. 4 Moisture content The measurement of

26、 moisture content shall be carried out according to prEN 13183-1 or prEN 13183-2. The reference moisture content is 20 %. 5 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 0,2

27、5 % for every 1 % of moisture content higher than 20 % up to 30 %, and will decrease by 0,25 % for every 1 % of moisture content lower than 20 %. The above values are independent of the species. | | | 6 Permitted deviations For a specified number of pieces of hardwood sawn timber of the same target

28、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. 6.1 On th

29、icknesses (t) t# 32 mm: 21 mm, +3 mm t 3 2m m : 2 2 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: 22 mm, +6 mm 100 mm 200 mm: 24 mm, +12 mm 6.3 On lengths (l) For unedged timber and boules: 0, +3 % of the target l

30、ength but no more than 90 mm. For square edged timber: 0, +3 % of the target length but no more than 90 mm. 7 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.

31、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 wh

32、ere l 1,00 mPage 4 EN 1313-2:1998 BSI 08-2000 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 6

33、3 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 France (FR) Thicknesses (in millimetres): 35, 55 Complementary preferred sizes in the United Kingdom (GB)

34、 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):

35、 15, 18, 26, 34, 41, 45, 52, 54, 63, 75 Complementary preferred sizes in Norway (NO) Widths (in millimetres): 63, 75, 125, 150, 250 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

36、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

37、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 unli

38、kely 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

39、, the permitted deviations specified in BS EN 336 apply. Table NA.1 Recommended reductions from sawn size to finished target size by processing of two opposite faces Dimensions in millimetres End use or product Reduction from sawn size to finished target size For target sizes of width or thickness 1

40、5 to 25 26 to 50 51 to 100 101 to 150 151 to 300 Floorings, matchings and interlocked boarding and planed all round 56777 Trim 6 7 8 9 10 Joinery and cabinet wood 791 01 21 4BS EN 1313-2:1999 BSI 389 Chiswick High Road London W4 4AL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |

41、 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BSI British Standards Institution BSI is the independent national body responsible for preparing British Standard

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