DIN EN 1927-1-2008 Qualitative classification of softwood round timber - Part 1 Spruces and firs English version of DIN EN 1927-1 2008-06《圆软木的定性分类 第1部分 云杉和冷杉》.pdf

《DIN EN 1927-1-2008 Qualitative classification of softwood round timber - Part 1 Spruces and firs English version of DIN EN 1927-1 2008-06《圆软木的定性分类 第1部分 云杉和冷杉》.pdf》由会员分享，可在线阅读，更多相关《DIN EN 1927-1-2008 Qualitative classification of softwood round timber - Part 1 Spruces and firs English version of DIN EN 1927-1 2008-06《圆软木的定性分类 第1部分 云杉和冷杉》.pdf（11页珍藏版）》请在麦多课文档分享上搜索。

1、June 2008DEUTSCHE NORM English price group 8No part of this standard may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 79.040!$PAF“1453035www.din

2、.deDDIN EN 1927-1Qualitative classification of softwood round timber Part 1: Spruces and firsEnglish version of DIN EN 1927-1:2008-06Qualitts-Sortierung von Nadel-Rundholz Teil 1: Fichten und TannenEnglische Fassung DIN EN 1927-1:2008-06SupersedesDIN V ENV 1927-1:1999-03www.beuth.deDocument comprise

3、s 11 pagesDIN EN 1927-1:2008-06 2 National foreword This standard has been prepared by Technical Committee CEN/TC 175 “Round and sawn timber” (Secretariat: AFNOR, France). The responsible German body involved in its preparation was the Normenausschuss Holzwirtschaft und Mbel (Timber and Furniture St

4、andards Committee), Technical Committee NA 042-01-14 AA Spiegelaus-schuss zu CEN/TC 175 und ISO/TC 218 Rund- und Schnittholz. Amendments This standard differs from DIN V ENV 1927-1:1999-03 as follows: a) Prestandard DIN V ENV 1927-1 has been revised in substance. b) The content of clause 6 is now in

5、cluded in Annex A (informative) “Qualitative classification for which the intended use is known”. c) Normative references have been updated. d) In clause 3 “Terms and definitions” reference is made to standards associated with terminology. e) Some of the rules for grading specified in Table 1 have b

6、een supplemented or amended. Previous editions DIN V ENV 1927-1: 1999-03 EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 1927-1March 2008ICS 79.040 Supersedes ENV 1927-1:1998 English VersionQualitative classification of softwood round timber - Part 1:Spruces and firsEpicas et sapinsQualitts-Sortie

7、rung von Nadel-Rundholz - Teil 1: Fichtenund TannenThis European Standard was approved by CEN on 23 February 2008.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any al

8、teration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by tra

9、nslationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany,

10、 Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManageme

11、nt Centre: rue de Stassart, 36 B-1050 Brussels 2008 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 1927-1:2008: EClassement qualitatif des bois ronds rsineux - Partie 1:EN 1927-1:2008 (E) 2 Contents Page Foreword3 1 Scope 4 2 Normat

12、ive references 4 3 Terms and definitions .4 4 Qualitative classification for which the intended use is unknown.5 5 Rules for grading .6 6 Additional criteria 7 Annex B (informative) Adeviations.9 Annex A (informative) Qualitative classification for which the intended use is known8 DIN EN 1927-1:2008

13、-06 -1: - EN 1927-1:2008 (E) 3 Foreword This document (EN 1927-1:2008) 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 identica

14、l text or by endorsement, at the latest by September 2008, and conflicting national standards shall be withdrawn at the latest by September 2008. Attention 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

15、 responsible for identifying any or all such patent rights. This document will supersede ENV 1927-1:1998. EN 1927 consists of the following parts with the main title Qualitative classification of softwood round timber: EN 1927-1, Spruces and firs EN 1927-2, Pines EN 1927-3, Larches and Douglas fir A

16、ccording to the CEN/CENELEC Internal Regulations, 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, L

17、atvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. DIN EN 1927-1:2008-06 EN 1927-1:2008 (E) 4 1 Scope This European Standard specifies the qualitative classification for the roundwood of spruces

18、(Picea spp) and firs (Abies spp). The classification is made either using Clauses 4 and 5 or using Annex A. Clauses 4 and 5 describe the qualitative classification of round timber for which the intended use is unknown. Informative Annex A gives a list of characteristics which serves as a guideline f

19、or contracts describing qualities for round timber of spruces and firs where the intended use is known. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the

20、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 sawn timber EN 844-2:1997, Round and sawn timber Terminology Part 2: General terms relating to round timber EN 844-5:1997, R

21、ound and sawn timber Terminology Part 5: Terms relating to dimensions of round timber EN 844-7:1997, Round and sawn timber Terminology Part 7: Terms relating to anatomical structure of timber EN 844-8:1997, Round and sawn timber Terminology Part 8: Terms relating to features of round timber EN 844-9

22、: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 attack EN 844-12:2000, Round and sawn timber Terminology Part 12: Additional terms and general index EN 1309-2, Rou

23、nd and sawn timber Method of measurement of dimensions Part 2: Round timber - Requirements for measurement and volume calculation rules EN 1310, Round and sawn timber Method of measurement of features EN 1311, Round and sawn timber Method of measurement of biological degrade ISO 2036, Wood for manuf

24、acture of wood flooring Symbols for marking according to species 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 844-1:1995, EN 844-2:1997, EN 844-5:1997, EN 844-7:1997, EN 844-8:1997, EN 844-9:1997, EN 844-10:1998 and EN 844-12:2000 apply. DIN EN 192

25、7-1:2008-06 EN 1927-1:2008 (E) 5 4 Qualitative classification for which the intended use is unknown The qualitative grading has four classes: A, B, C and D. The grading is based on the following general description of quality classes: Quality class A First quality timber. Generally corresponding to

26、a butt log with clear timber, without defects or with only minor defects and with few restrictions to its use. Quality class B Timber of average to first quality, with no specific requirements for clear wood. Knots are permitted to such an extent as is considered to be average for each species. Qual

27、ity class C Timber of average to low quality, allowing all quality characteristics which do not seriously reduce the natural characteristics of the wood. Quality class D Timber which can be sawn into usable wood, which, because of its characteristics, falls into none of the quality classes A, B or C

28、. The classes are defined more precisely in Table 1. All the listed qualitative characteristics in Table 1 shall be taken into account when a class is assigned, and measurements shall be made according to EN 1309-2, EN 1310 and EN 1311. This classification shall be completed with the Latin name of t

29、he specified species. The abbreviation of this Latin name can also be used instead of the full name. EXAMPLE 1 Fir: Abies alba class B or ABIA-B1. EXAMPLE 2 Spruce: Picea abies class B or PICA-B1. 1Symbols given in ISO 2036 DIN EN 1927-1:2008-06 EN 1927-1:2008 (E) 6 5 Rules for grading Table 1 Gradi

30、ng of spruces and firs Classes Characteristics A B C D knots intergrown, sound not permitted a 4 cm 8 cm permitted dead not permitted 3 cm 6 cm permitted unsound not permitted not permitted 3 cm permitted resin pocket not permitted a1 per cross-section permitted permitted rate of growth 4 mm 7 mm un

31、limited unlimited growth spiral grain 3 cm/m 7 cm/m 10 cm/m unlimited eccentric pith 10 % 15 % unlimited unlimited reaction wood bnot permitted 10 % 33 % unlimited sweep c 20 cm no requirement 1 cm/m 1,5 cm/m 3 cm/m 20 cm to 35 cm 1 cm/m 1 cm/m 1,5 cm/m 3,5 cm/m 35 cm 1 cm/m 1,5 cm/m 2 cm/m 4,5 cm/m

32、 taperc 20 cm no requirement 1,25 cm/m 2 cm/m unlimited 20 cm to 35 cm unlimited 1,5 cm/m 2,5 cm/m unlimited 35 cm unlimited 2 cm/m 4 cm/m unlimited shakes 35 cm not permitted not permitted 1/2 permitted heart shakes (except check) c 35 cm 1/4 1/4 1/2 permitted ring shakes c 35 cm not permitted not

33、permitted not permitted 1/2 35 cm not permitted 1/4 1/3 1/2 insect attack 2 mm (e.g. Trypodendron lineatum) not permitted not permitted not permitted dpermitted 2 mm (e.g. Sirex, Cerambycidae) not permitted not permitted not permittedSmall-scale attack permittedDIN EN 1927-1:2008-06 EN 1927-1:2008 (

34、E) 7 Table 1 (continued) Classes Characteristics A B C D dote not permitted not permitted For mid diameters 35 cm permitted in the surface area up to 10 % of the mid diameter For mid diameters 35 cm permitted in the surface area up to 20 % of the mid diameter permitted rot not permitted not permitte

35、d not permitted e permitted fstain not permitted not permitted permitted in the sap area gpermitted aRefer to the general description of quality classes. bMethod of measurement: width of reaction wood as a function of the cross section diameter (in addition to EN 1310). cMid diameter under bark. dIn

36、itial stages of Trypodendron lineatum attack permitted. e Small areas of surface rot are permitted in the area of the butt swelling.f Provided that at least 80 % of the cross section is usable on the complete length.g Specific contract regulations are recommended. 6 Additional criteria In case of do

37、ubt, any externally visible or possible hidden flaws (e.g. knots under buckles, overgrown shakes, stripping damage) shall be laid bare and the revealed flaws assessed according to the quality specifications. Foreign bodies (e.g. shrapnel) are not dealt with in this Standard. Where some characteristi

38、cs of round wood of the classes A and B do not fulfil the quality criteria on agreement, they can be compensated by higher quality in other characteristics. Generally, the following characteristics cannot be compensated: insect attack (especially Trypodendron lineatum), rot and stain. If there is co

39、mpensation for minor rot of little consequence, an agreement is necessary. Each log can be graded either in a single class or in more than one class by using theoretical crosscut points. The minimum length, accepted for a theoretical crosscut point, is 3 m. DIN EN 1927-1:2008-06 EN 1927-1:2008 (E) 8

40、 Annex A (informative) Qualitative classification for which the intended use is known The following list of characteristics should be considered for contracts where the intended use is known. EN 1309-2, EN 1310 and EN 1311 shall be used as a reference. NOTE The following list is not exhaustive. Addi

41、tional characteristics may be considered. butt swelling; eccentric pith; foreign body; insect attack; knots; rate of growth; reaction wood; resin pocket; rot; shakes; spiral grain; stain; sweep; taper; tapping cut; undercut. DIN EN 1927-1:2008-06 EN 1927-1:2008 (E) 9 Annex B (informative) Adeviation

42、s A- deviation: National deviation due to regulations, the alteration of which is for the time being outside the competence of the CEN/ CENELEC national member. This European Standard does not fall under any Directive of the EU. In the relevant CEN/ CENELEC countries these A- deviations are valid in

43、stead of the provisions of the European Standard until they have been removed. Lithuania Apvaliosios medienos apskaitos tvarkos apraas Order of description for registration of round timber (in., (Official Gazette) 21-12-2007, No. 135-5502; valid since 01-01-2008). Apvaliosios medienos klasifikavimo ir enklinimo taisykls Rules for classification and marking of round timber (in., (Official Gazette) 13-07-2001, No. 61-2198; valid since 14-07-2001). DIN EN 1927-1:2008-06