DIN EN 14081-1-2016 Timber structures - Strength graded structural timber with rectangular cross section - Part 1 General requirements German version EN 14081-1 2016《木结构 矩形截面的强度分级结.pdf

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1、June 2016 English price group 19No part of this translation 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!%V“2512599www.din.deDIN EN 1

2、4081-1Timber structures Strength graded structural timber with rectangular cross section Part 1: General requirements;English version EN 14081-1:2016,English translation of DIN EN 14081-1:2016-06Holzbauwerke Nach Festigkeit sortiertes Bauholz fr tragende Zwecke mit rechteckigem Querschnitt Teil 1: A

3、llgemeine Anforderungen;Englische Fassung EN 14081-1:2016,Englische bersetzung von DIN EN 14081-1:2016-06Structures en bois Bois de structure section rectangulaire class pour sa rsistance Partie 1: Exigences gnrales;Version anglaise EN 14081-1:2016,Traduction anglaise de DIN EN 14081-1:2016-06Supers

4、edesDIN EN 14081-1:2011-05 andDIN EN 14081-4:2009-10See start of applicationwww.beuth.deDTranslation by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authoritative.Document comprises 43 pages 05.16 2 A comma is used as the decimal marker. Start of application

5、The start of application of this standard is 2016-06-01. It should be noted that, in Germany, CE conformity marking of construction products will be permitted once this standard has been listed in the Official Journal of the European Union and/or the Bundesanzeiger (German Federal Gazette) and from

6、the date given therein. For further information, users of this standard should refer to the websites of the European Commission or of the relevant building authority. The standard which this document replaces, DIN EN 14081-1:2011-05, may be used in parallel with this standard during a specified tran

7、sition period where such has been laid down in the Official Journal of the European Union and/or the Bundesanzeiger (German Federal Gazette). National foreword This document (EN 14081-1:2016) has been prepared by Technical Committee CEN/TC 124 “Timber structures” (Secretariat: AFNOR, France). The re

8、sponsible German body involved in its preparation was DIN-Normenausschuss Bauwesen (DIN Standards Committee Building and Civil Engineering), Working Committee NA 005-04-01 AA Holzbau (SpA zu CEN/TC 124, CEN/TC 250/SC 5, ISO/TC 165). Amendments This standard differs from DIN EN 14081-1:2011-05 and DI

9、N EN 14081-4:2009-10 as follows: a) a new Clause 6 for the assessment and verification of the constancy of performance in connection with the EU Construction Products Regulation has been added; b) Annex ZA has been adapted to the Construction Products Regulation; c) new clauses on fire resistance, r

10、elease of dangerous substances, geometrical data and environmental issues have been added; d) the marking codes for species combinations have been moved to Annex B; e) several definitions have been improved. Previous editions DIN EN 518: 1996-07 DIN EN 519: 1996-07 DIN EN 14081-1: 2006-03, 2011-05 D

11、IN EN 14081-4: 2006-02, 2007-05, 2007-12, 2008-09, 2009-06, 2009-10 DIN EN 14081-1:2016-06 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 14081-1 February 2016 ICS 79.040 Supersedes EN 14081-1:2005+A1:2011, EN 14081-4:2009English Version Timber structures - Strength graded structural timber wi

12、th rectangular cross section - Part 1: General requirements Structures en bois - Bois de structure section rectangulaire class pour sa rsistance - Partie 1 : Exigences gnrales Holzbauwerke - Nach Festigkeit sortiertes Bauholz fr tragende Zwecke mit rechteckigem Querschnitt - Teil 1: Allgemeine Anfor

13、derungen This European Standard was approved by CEN on 13 February 2016. 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 bibliogra

14、phical references concerning such national standards may be obtained on application to the CEN-CENELEC 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 translation under the responsibil

15、ity of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic

16、of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISAT

17、ION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2016 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 14081-1:2016 EEN 14081-1:2016 (E) 2 Contents Page European foreword 4 Introduc

18、tion . 5 1 Scope . 6 2 Normative references . 6 3 Terms and definitions 7 4 Symbols 8 5 Requirements for structural timber . 9 5.1 Mechanical resistance 9 5.1.1 General . 9 5.1.2 Visual strength grading 9 5.1.3 Machine strength grading . 9 5.2 Fire resistance (charring rate) 11 5.3 Reaction to fire

19、11 5.4 Release of dangerous substances . 12 5.5 Biological durability 12 5.5.1 Structural timber without preservative treatment . 12 5.5.2 Structural timber with preservative treatment 13 5.6 Geometrical data 13 6 Assessment and verification of constancy of performance AVCP 13 6.1 General . 13 6.2 T

20、ype testing 13 6.2.1 General . 13 6.2.2 Test samples, testing and compliance criteria 14 6.2.3 Test reports 15 6.2.4 Shared other party results 15 6.3 Factory production control (FPC) 15 6.3.1 General . 15 6.3.2 Requirements 16 6.3.3 Product specific requirements 19 6.3.4 Initial inspection of facto

21、ry and of FPC 20 6.3.5 Continuous surveillance of FPC . 20 6.3.6 Procedure for modifications 21 7 Marking 21 7.1 Marking methods . 21 7.2 Information on the timber (method A) or on the package (method B) 21 7.3 Information in the documents accompanying strength graded structural timber 22 8 Environm

22、ental issues . 23 Annex A (normative) Requirements for strength reducing characteristics for visual grading standards 24 A.1 Limitations for strength-reducing characteristics . 24 A.1.1 Knots . 24 A.1.2 Slope of grain . 24 DIN EN 14081-1:2016-06 EN 14081-1:2016 (E) 3 A.1.3 Density and rate of growth

23、 24 A.1.4 Fissures 25 A.2 Limitations for geometrical characteristics 25 A.2.1 Wane 25 A.2.2 Warp 25 A.3 Limitations for biological characteristics 26 A.4 Other characteristics . 26 A.4.1 Reaction wood . 26 A.4.2 Other criteria 26 Annex B (normative) Marking codes for species 27 B.1 Marking codes fo

24、r single species 27 B.2 Marking codes for species combination . 28 Annex C (normative) Measurement of moisture content 30 C.1 General . 30 C.2 Measurement of moisture content of timber during production 30 Annex ZA (informative) Clauses of this European Standard addressing the provisions of the EU C

25、onstruction Products Regulation . 31 ZA.1 Scope and relevant characteristics 31 ZA.2 Procedure for Assessment and Verification of the Constancy of Performance (AVCP) of strength graded structural timber with rectangular cross section . 33 ZA.2.1 System(s) of AVCP . 33 ZA.2.2 Declaration of performan

26、ce (DoP) . 34 ZA.2.2.1 General . 34 ZA.2.2.2 Content . 35 ZA.2.2.3 Example of DoP . 35 ZA.3 CE marking and labelling . 36 ZA.3.1 General . 36 ZA.3.2 CE marking 36 ZA.3.3 Marking on the product or on a label attached to the package 39 Bibliography . 41 DIN EN 14081-1:2016-06 EN 14081-1:2016 (E) 4 Eur

27、opean foreword This document (EN 14081-1:2016) has been prepared by Technical Committee CEN/TC 124 “Timber structures”, 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

28、 the latest by August 2016, and conflicting national standards shall be withdrawn at the latest by November 2017. 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 responsible for identifying any

29、 or all such patent rights. This document supersedes EN 14081-4:2009, EN 14081-1:2005+A1:2011. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Regulation n305/2011. For relation

30、ship with EU Regulation, see informative Annex ZA, which is an integral part of this document. EN 14081-4:2009 will be withdrawn and replaced by 5.1.3, paragraph 2 of this document. Compared to EN 14081-1:2005+A1:2011, the following modifications have been made: new Clause 6 for Assessment and Verif

31、ication of Constancy of Performance linked to the CPR; Annex ZA has been adapted to the CPR; new clauses on Fire Resistance, release of dangerous substances, geometrical data and environmental issues have been added; marking codes for species combinations have been moved to Annex B; improvement of s

32、everal definitions. Other parts of the series of EN 14081 are: EN 14081-2, Timber structures - Strength graded structural timber with rectangular cross section - Part 2: Machine grading; additional requirements for initial type testing; EN 14081-3, Timber structures - Strength graded structural timb

33、er with rectangular cross section - Part 3: Machine grading; additional requirements for factory production control. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bul

34、garia, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, T

35、urkey and the United Kingdom. DIN EN 14081-1:2016-06 EN 14081-1:2016 (E) 5 Introduction There are basically two methods of strength grading: visual grading and machine grading. Machine grading is in common use in a number of countries. The countries use two basic systems, referred to as output contr

36、ol and machine control. Both systems require a visual override inspection to cater for strength-reducing characteristics that are not automatically sensed by the machine. Output control is suitable for use where the grading machines are situated in manufacturing units grading limited sizes, species

37、and grades in repeated production runs. This enables the system to be controlled by testing timber specimens from the daily output. These tests, together with statistical procedures, are used to monitor and adjust the machine settings to maintain the required strength properties for each strength cl

38、ass. With this system it is permissible for machine approval requirements to be less demanding and for machines of the same type to have non-identical performance. Machine control was developed in Europe. Because of the large number of sizes, species and grades used it was not possible to carry out

39、quality control tests on timber specimens drawn from production. Machine control relies, therefore, on the machines being strictly assessed and controlled, and on considerable research effort to derive the machines settings, which remain constant for all machines of the same type. Visual grading is

40、also in common use in a number of countries. There are many different visual strength grading standards for timber in use in Europe. These have come into existence to allow for: different species or groups of species; geographic origin; different dimensional requirements; varying requirements for di

41、fferent uses; quality of material available; historic influences or traditions. Because of the diversity of existing visual grading standards in use in different countries, it is currently impossible to lay down a single standard for all Member States. The requirements given in this European Standar

42、d on visual strength grading are therefore basic principles, which should be followed when drawing up requirements for limits for some of the characteristics. The assignments to strength classes are based on grading reports. When these grading reports are evaluated and approved by CEN/TC 124/WG2/TG1

43、, they become Approved Grading Reports (AGR) which are required for assigning visual grades to EN 1912 and for machine control. DIN EN 14081-1:2016-06 EN 14081-1:2016 (E) 6 1 Scope This European Standard specifies requirements for strength graded structural timber with rectangular cross-sections eit

44、her visual or machine graded, shaped by sawing, planning or other methods and with cross-sectional dimensions complying with EN 336 (referred to as structural timber in the following clauses). This European Standard includes provisions for test methods, Assessment and Verification of Constancy of Pe

45、rformance and marking of structural timber. NOTE 1 For machine strength graded timber additional provisions for type testing (TT) are given in EN 140812 and for factory production control (FPC) in EN 140813. NOTE 2 An acceptance procedure for verification of a lot is given in EN 14358 which may be u

46、sed for a delivery of structural timber. This European Standard identifies characteristics for which limits have to be given in visual grading standards. This European Standard covers structural timber, untreated or treated against biological attack. This European Standard does not cover: timber tre

47、ated by fire retardant products to improve its fire performance; thermally and/or chemically modified timber; structural finger jointed timber. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application.

48、For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 338, Structural timber Strength classes EN 350-1, Durability of wood and wood-based products Natural durability of solid wood Part 1: Gui

49、de to the principles of testing and classification of the natural durability of wood EN 350-2, Durability of wood and wood-based products Natural durability of solid wood Part 2: Guide to natural durability and treatability of selected wood species of importance in Europe EN 384, Structural timber Determination of characteristic values of mechanical properties and density EN 844-7, Round and sawn timber Terminolo