1、STD-BSI BS EN 1311-ENGL 1997 H 1b24bb9 b37255 2011 BRITISH STANDARD - Round and sawn timber- Method of measurement of biological degrade The European Standard EN 1311 : 1997 has the status of a British Standard ICs 79.040 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGH LAW BS EN 13
2、11 : 1997 STD-BSI BS EN 1311-ENGL 1777 1b24bb7 Ob3725b 140 Amd. No. BS EN 1311 : 1997 Date Text affected National foreword This British Standard is the English language version of EN 1311 : 1997. The LJK participation in its preparation was entrusted by Technical Committee B/543, Round and sawn timb
3、er, to Subcommittee B/543/1, %ber terminology and measurement, which has the responsibdity to: - aid enquirem to understand the text; - present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK intmests informed; - monitor related int
4、emational and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be foun
5、d in the BSI Standards Catalogue under the section entitled International standards Correspondence Index, or by using the Find faciiity of the BSI Standards Electronic Catalogue. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This docum
6、ent comprises a front cover, an inside front cover, the EN title page, pages 2 to 4, an inside back cover and a back cover. This British Standard, having been prepared under the direction of the Sector Board for Building and Civil Engineering, was published under the authority of the Standards Board
7、 and comes into effect on 15 September 1997 O BSI 1997 ISBN O 680 28347 X * M * STD-BSI BS EN 13LL-ENGL 1997 lb24bb9 Ob39257 087 U EUROPEAN STANDARD NORME EUROPENNE EUROPmCHE NORM EN 1311 April 1997 ICs 79.040 Descriptors: Wood, sawlogs, sawn timber, measurements, biodegradability English version Ro
8、und and sawn timber - Method of measurement of biological degrade Bois ronds et bois scis - Mthode de mesure des dtkrations biologiques von Schadhgsbefail Rund- und Schnittholz - Verfahren zur Messung This European Standard was approved by CEN on 1997-03-05. CEN members are bound to comply with the
9、CENKENELEC Internai Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date and bibliographicd references concerning such national standards may be obtained on application to the Central Secretanat or to any CE
10、N member. This European Standard exids 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 me
11、mbeis are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, I, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches
12、 Komitee fr Normung Centrd Secretariat: rue de Stassart 36, B-1060 Brussels O 1997 CEN - All rights of xploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1311 : 1997 E STD-BSI BS EN L31L-ENGL 1777 Lb2qbbS Ob37258 TL3 Page 2 EN 1311 : 1997 Foreword This
13、European Standard has been prepared by Technical Committee CEN/rC 175, Round and sawn timber, the secretariat of which is held by AFNOR. This standard is one of a series, being methods of measurement for round timber and sawn timber. other standards in this series are: EN 13041 Round and sawn timber
14、- Method of measurement of dimensions - Part 1: Sawn timber Round and sawn timber- Method of measurement of dimensions - Part 2: Round timber Round and sawn timber- Method of measurement of features prEN 13092 EN 1310 This European standard shall be given the status of a national standard, either by
15、 publication of an identical text or by endorsement, at the latest by October 1997, and conflicting national standards shall be withdrawn at the latest by October 1997. According to the CENKENELEC internai Regulations, the national standards organizations of the following countries are bound to impl
16、ement this European Standard: Austria, Belgium, Denmark, Finiand, hce, Germanx Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norwax Portugal, Spain, Sweden, Switzerland and the United Kingdom. Contents Foreword 1 Scope 2 Nonnative references 3 Defmitions 4 Sawntimber 4.1 Degrade by insec
17、ts 4.2 Fungal degrade 5 Roundtimber 6.1 Degrade by insects 5.2 Fungai degrade 5.3 Hollow 6.4 Other degrade page 2 3 3 3 3 3 3 4 4 4 4 4 O BSI 1997 STD-BSI BS EN 1311-ENGL 1777 1b24bb9 Ob37259 75T 1 scope This European Standard specifies the methods of measuring biological degradations (caused by ins
18、ects, fungi etc.) that are taken into account in the visual gradmg of sawn timber and round timber for appearance or to assess its mechanical properties. It does not apply to the strength graduig of stsuctural timber (see EN 518 and EN 519). This standard applies to hardwood and softwood sawn timber
19、, both square edged and unedged, to processed timber and to round timber. This standard does not apply to tropical timber. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These nomative references are cited at the appropri
20、ate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions 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 ref
21、erred to applies. EN 844-1 EN 844-2 EN 844-3 EN 844-4 EN 84-44 EN 844-6 EN 844-7 EN 844-8 EN 844-9 Round and sawn timber - Tminology - Part 1: General temzs common to round timber and sawn timber Round and sawn tirnber- Terminology - Part 2: General temns relating to mnd timber Round and sawn timber
22、- Tminology - Pa,rt 3: General temns relating to sawn timber Round and sawn timber- Terminology - Part O: Terms relating to moisture content Round a,nd sawn timber- Terminology - Part 5: Terms relating to dimensions of round timber Round and sawn timber- Tminology - Part 6: Terms relating to dimensi
23、ons of sawn timber Round and sawn timber- Terminology - Part ?: Terms relating to anatomical stmture of timber Round and sawn timber- Tminobgy - Part 8: Tm relating to features of round timber Round a?nd sa.m timber- Terminology - Part 9: Terms relating to features of sawn timber prEN 844-10 prEN 84
24、4-11 EN 518 EN 519 Page 3 EN 1311 : 1997 Round and sawn timber- Terminology - Part 1 O: Tm relating to stain and fungal attack Round and sawn timber- Terminology - Part 11: Terms relating to degrade by insects Structural timber- Grading - Requirements for visual streng% pruling Sta or b) measure the
25、 width and/or the length of the rectangle enclosing it, expressed in centimetres or as a percentage of the width and/or the length of the face or edge affected. if there are several affected areas on a face or edge, the respective dimensions shall be totalled. O BSI 1907 STD-BSI BS EN L3LL-ENGL L977
26、 LbZLibbS Ub3SZbU b7L Page 4 EN 1311 : 1997 6 Round timber 6.1 Degrade by insects Depending on the grading nile used a) note the presence of insect holes; their diameter may be stated in millimetres, and also the species of insect causing them; or b) state the degree of degrade: - if local, by the l
27、ength of the affected area, expressed in centimetres or metres or as a percentage of the length of the round timber; - if scattered, by the number of insect holes per metre length. 6.2 Fungal degrade 6.2.1 Stain Not measured note its presence. 6.2.2 Rot 6.2.2.1 Sapwood rot Not measured note its pres
28、ence. 6.2.2.2 Heartwood rot Depending on the grading nile used a) note its presence; or b) measure by stating the diameter of a circle enclosing the area affected, expressed in centimetres or as a percentage of the diameter of the end surface of the round timber. 6.3 Hollow Depending on the grading
29、rule used a) note its presence; or b) measure by stating the diameter of a circle enclosing the area affected, expressed in centimetres or as a percentage of the diameter of measurement of the round timber. 6.4 Other degrade Depending on the type of degrade, the more appropriate method described abo
30、ve shall be applied. The method used shall be specified in the gradmg rules. O BSI 1997 _ STD=BSI BS EN L3LL-ENGL 1997 Lb24bb7 Ob372bL 508 BS EN 1311 : 1997 BSI 389 Chiswick High Road London Y4 4AL BSI - British Standards Institution BSI is the independent national body responsible for preparing Bri
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