BS EN 975-1-2009 Sawn timber — Appearance grading of hardwoods Part 1 Oak and beech.pdf
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1、BS EN 975-1:2009 ICS 79.040 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BRITISH STANDARD Sawn timber Appearance grading of hardwoods Part 1: Oak and beech This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 April 200
2、9 BSI 2009 ISBN 978 0 580 60399 0 Amendments/corrigenda issued since publication DateComments BS EN 975-1:2009 National foreword This British Standard is the UK implementation of . It supersedes BS EN 975-1:1996 which is withdrawn. The UK participation in its preparation was entrusted to Technical C
3、ommittee B/543, Round and sawn timber. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a Brit
4、ish Standard cannot confer immunity from legal obligations. EN 975-1:2009 BS EN 975-1:2009BS EN 975-1:2009 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 975-1 March 2009 ICS 79.040Supersedes EN 975-1:1995 English Version Sawn timber - Appearance grading of hardwoods - Part 1: Oak and beech Bo
5、is scis - Classement daspect des bois feuillus - Partie 1: Chne et htre Schnittholz - Sortierung nach dem Aussehen von Laubholz - Teil 1: Eiche und Buche This European Standard was approved by CEN on 24 January 2009. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which sti
6、pulate 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 CEN Management Centre or to any CEN member. This European Standar
7、d 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 CEN Management Centre has the same status as the official versions. CEN members are the national stand
8、ards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kin
9、gdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2009 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 975-1:2009: E BS EN
10、 975-1:2009BS EN 975-1:2009 EN 975-1:2009 (E) 2 Contents Page Foreword 3? 1?Scope 4? 2?Normative references 4? 3?Terms and definitions .5? 4?Method of determination of sawn timber quality 5? 4.1?Rules for grading .5? 4.2?Grading principles .6? 4.2.1?Assessment of the quality 6? 4.2.2?Cases of un-edg
11、ed boards 6? 4.3?Criteria to be taken into account 6? 4.3.1?General 6? 4.3.2?Criteria linked to the structure of the timber 7? 4.3.3?Sawing characteristics 7? 4.3.4?Warp 7? 4.3.5?Fungal and insect attacks .7? 4.3.6?Stains 7? 4.3.7?Other characteristics .8? 5?Denomination of grades 8? 5.1?General 8?
12、5.2?Oak (Q) 8? 5.3?Beech (F) .9? 6?Acceptance of batches 9? 6.1?Un-edged boards .9? 6.2?Square edged timber .9? 7?Grading rules 9? 7.1?Grading face .9? 7.2?Un-edged boards .9? 7.2.1?Grading area .9? 7.2.2?Presence of a solitary feature (only one) . 10? 7.3?Strips and square edged timber 10? 7.3.1?Kn
13、ots 10? 7.3.2?Other features . 10? 7.4?Baulks 10? 7.5?Appearance grading Tables . 11? Bibliography . 35? w w w . b z f x w . c o m BS EN 975-1:2009BS EN 975-1:2009 EN 975-1:2009 (E) 3 Foreword This document (EN 975-1:2009) has been prepared by Technical Committee CEN/TC 175 “Round and sawn timber”,
14、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 September 2009, and conflicting national standards shall be withdrawn at the latest by September 2009. At
15、tention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 975-1:1995. According to the CEN/CENELEC Internal Regulation
16、s, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherland
17、s, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. w w w . b z f x w . c o m BS EN 975-1:2009BS EN 975-1:2009 EN 975-1:2009 (E) 4 1 Scope This European Standard specifies the rules determining the quality of appearance graded sawn timber. It
18、describes various grades of temperate hardwood rough sawn timber and regularized timber for which it lays down denominations and definitions. It also gives rules for composition and acceptance of batches. This standard gives minimum requirements for each grade classification. Sawn timber not include
19、d within limits given in this standard may be defined, if necessary, by contract specifications established on the basis of this standard. This standard applies to grading of green and dried timber. Characteristics apply at the time of grading. This standard does not apply to the strength grading of
20、 structural timber or to sawn timber for pallets. This standard is applicable to the following products: a) Oak sawn timber, in the following categories: 1) Un-edged boards: individual selected pieces and boules; 2) Square edged timber and strips (not exceeding 41 mm thickness); 3) Baulks (sum of th
21、ickness + width 200 mm and thickness 80 mm). b) Beech sawn timber, in the following categories: 1) Un-edged boards: individual selected pieces and boules; 2) Square edged timber and strips; 3) Prepared timber (dried timber). 2 Normative references The following referenced documents are indispensable
22、 for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 844-1:1995, Round and sawn timber Terminology Part 1: General terms common to round timber and saw
23、n timber EN 844-3:1995, Round and sawn timber Terminology Part 3: General terms relating to sawn timber EN 844-4:1997, Round and sawn timber Terminology Part 4: Terms relating to moisture content EN 844-6:1997, Round and sawn timber Terminology Part 6: Terms relating to dimensions of sawn timber EN
24、844-7:1997, Round and sawn timber Terminology Part 7: Terms relating to anatomical structure of timber EN 844-9:1997, Round and sawn timber Terminology Part 9: Terms relating to features of sawn timber EN 844-10:1998, Round and sawn timber Terminology Part 10: Terms relating to stain and fungal atta
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