BS EN 12369-3-2008 Wood-based panels - Characteristic values for structural design - Solid-wood panels《木质板材 结构设计特征值 实心木制板材》.pdf

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1、BS EN12369-3:2008ICS 79.060.99NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDWood-based panels Characteristic valuesfor structural designPart 3: Solid-wood panelsLicensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 16/12/2009 02:23, Uncontrolled Copy, (c) BSI

2、This British Standardwas published underthe authority of theStandards Policy andStrategy Committee on 30September 2009 BSI 2009ISBN 978 0 580 58221 9Amendments/corrigenda issued since publicationDate CommentsBS EN 12369-3:2008National forewordThis British Standard is the UK implementation of EN 1236

3、9-3:2008.The UK participation in its preparation was entrusted to TechnicalCommittee B/541, Wood based panels.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisionsof a contract. Users

4、 are responsible for its correct application.Compliance with a British Standard cannot confer immunityfrom legal obligations.Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 16/12/2009 02:23, Uncontrolled Copy, (c) BSIBS EN 12369-3:2008EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 12369-3N

5、ovember 2008ICS 79.060.99English VersionWood-based panels - Characteristic values for structural design- Part 3: Solid-wood panelsPanneaux base de bois - Valeurs caractristiques pour laconception des structures - Partie 3: Bois panneautsHolzwerkstoffe - Charakteristische Werte fr dieBerechnung und B

6、emessung von Holzbauwerken - Teil 3:MassivholzplattenThis European Standard was approved by CEN on 12 October 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 a

7、lteration. 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 tr

8、anslationunder 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

9、, 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 NORMUNGManagem

10、ent 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 12369-3:2008: ELicensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 16/12/2009 02:23, Uncontrolled Copy, (c) BSIBS EN 12369-3:2008

11、EN 12369-3:2008 (E) 2 Contents Page Foreword 3 1 Scope 4 2 Normative references 4 3 Terms and definitions and symbols 4 3.1 Terms and definitions .4 3.2 Symbols 5 3.2.1 Main Symbols .5 3.2.2 Subscripts 6 4 General 6 5 Characteristic values for solid wood panels 6 5.1 Introduction 6 5.2 Load-bearing

12、panels for use in all service classes 7 Annex A (informative) Presentation of characteristic values .9 Bibliography . 10 Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 16/12/2009 02:23, Uncontrolled Copy, (c) BSIBS EN 12369-3:2008EN 12369-3:2008 (E) 3 Foreword This document (EN 12369-3:2008)

13、 has been prepared by Technical Committee CEN/TC 112 “Wood-based panels”, the secretariat of which is held by DIN. 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 May 2009, and conflicting nationa

14、l standards shall be withdrawn at the latest by May 2009. 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 or all such patent rights. This European Standard is in

15、tended to be used in conjunction with EN 1995-1-1. This European Standard is one of a series specifying characteristic values of wood-based panels for structural design. The other parts of this series are listed in the Bibliography. Annex A is informative. According to the CEN/CENELEC Internal Regul

16、ations, 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, Nethe

17、rlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 16/12/2009 02:23, Uncontrolled Copy, (c) BSIBS EN 12369-3:2008EN 12369-3:2008 (E) 4 1 Scope This European Standard provides informa

18、tion on the characteristic values for use in designing structures incorporating wood-based panels. The characteristic values given are as defined in EN 1995-1-1. This European Standard includes the characteristic values of the mechanical properties and of the raw density for solid-wood panels comply

19、ing with EN 13353:2008 technical classes SWP/1 S, SWP/2 S, SWP/3 S. 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 latest edition of the referenced doc

20、ument (including any amendments) applies. EN 338, Structural timber Strength classes EN 789, Timber structures Test methods Determination of mechanical properties of wood based panels EN 1058, Wood-based panels Determination of characteristics values of mechanical properties and density EN 1995-1-1,

21、 Eurocode 5: Design of timber structures Part 1-1: General Common rules and rules for buildings EN 13017-1, Solid wood panels Classification by surface appearance Part 1: Softwood EN 13017-2, Solid wood panels Classification by surface appearance Part 2: Hardwood EN 13353:2008, Solid wood panels (SW

22、P) Requirements 3 Terms and definitions and symbols 3.1 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1.1 characteristic values 3.1.1.1 characteristic strength value population 5-percentile value obtained from the results of tests with a durati

23、on of 300 s at an equilibrium moisture content of the test pieces relating to a temperature of 20 C and a relative humidity of 65 % 3.1.1.2 characteristic stiffness value either the population 5-percentile or the mean value obtained of tests with a duration of 300 s at an equilibrium moisture conten

24、t of the test pieces relating to a temperature of 20 C and a relative humidity of 65 % NOTE The stiffness values given in the Tables are mean values as these are most commonly used in design. A note in Annex A explains how to calculate the 5-percentile value. 3.1.1.3 characteristic density populatio

25、n 5-percentile value with mass and volume corresponding to equilibrium moisture content at a temperature of 20 C and a relative humidity of 65 % Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 16/12/2009 02:23, Uncontrolled Copy, (c) BSIBS EN 12369-3:2008EN 12369-3:2008 (E) 5 3.1.2 service cl

26、asses NOTE Three service classes are defined in EN 1995-1-1 as follows. 3.1.2.1 service class 1 class characterized by a moisture content in the materials corresponding to a temperature of 20 C and the relative humidity of the surrounding air exceeding 65 % only for a few weeks per year 3.1.2.2 serv

27、ice class 2 class characterized by a moisture content in the materials corresponding to a temperature of 20 C and the relative humidity of the surrounding air exceeding 85 % for a only few weeks per year 3.1.2.3 service class 3 climatic conditions leading to higher moisture contents than in service

28、class 2 3.1.3 load duration class class characterized by the effect of a constant load acting for a certain period of time in the life of the structure NOTE 1 For a variable action, the appropriate class is determined on the basis of an estimate of the interaction between the typical variation of th

29、e load with time and the rheological properties of the materials. NOTE 2 For strength and stiffness calculations, actions are assigned to one of the load-duration classes given in Table 1. Table 1 Load duration classes Load duration class Order of accumulated duration of characteristic load Examples

30、 of loading Permanent more than 10 years self weight Long-term 6 months to 10 years storage Medium-term 1 week to 6 months imposed load Short-term less than one week snowaand wind Instantaneous accidental load aIn areas which have a heavy snow load for a prolonged period to time, part of the load sh

31、ould be regarded as medium-term. 3.2 Symbols In the Tables the following symbols are used: 3.2.1 Main Symbols f Strength E Modulus of elasticity (defined as stiffness in EN 1995-1-1) G Modulus of rigidity Density Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 16/12/2009 02:23, Uncontrolled C

32、opy, (c) BSIBS EN 12369-3:2008EN 12369-3:2008 (E) 6 k Retention in strength (kmod) or stiffness (kdef) after a period of time relative to initial values. Values are included in EN 1995-1-1. / or 0 Parallel to the grain direction of the outer layer of SWP or 90 Perpenticular to the grain direction of

33、 the outer layer of SWP 3.2.2 Subscripts mBending, panel tTension cCompression pBending, planar vPanel shear rPlanar shear nomNominal modStrength defDeflection 4 General The characteristic values given in this European Standard are the minimum values applicable to products conforming to EN 13353. Th

34、ese values may be presented in the format as shown in Annex A or similar to it. Alternatively, characteristic values other than those contained in this standard shall be determined using sampling techniques as set out in EN 1058 and testing procedures given in EN 789, and declared in a format as sho

35、wn in Annex A or similar to it. Additionally, these characteristic values shall be supported by the following information: product description; requirement standard; service class or classes in which the panel can be used; particulars regarding the kind of wood and the appearance class as well as th

36、e panel structure. 5 Characteristic values for solid wood panels 5.1 Introduction This clause of this European Standard gives information on the characteristic values of both mechanical properties and density for those solid wood panels the values of which, unless specified to the contrary, have Lic

37、ensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 16/12/2009 02:23, Uncontrolled Copy, (c) BSIBS EN 12369-3:2008EN 12369-3:2008 (E) 7 been determined using the sampling techniques as set out in EN 1058 and the testing procedures given in EN 789. The minimum appearance class of the panels shall be

38、class S and C according to EN 13017-1 and -2 respectively. 5.2 Load-bearing panels for use in all service classes For load-bearing purposes under conditions of service class 1, the characteristic values of the mechanical properties and of the density as specified in Tables 2 and 3 apply. The mechani

39、cal properties require to be modified to EN 1995-1-1 for duration of load (kmod, kdef). For load-bearing purposes under conditions of service classes 2 and 3, the characteristic values of the mechanical properties as specified in Tables 2 and 3 require to be modified (kmod, kdef) to EN 1995-1-1 for

40、the service class as well as for the load duration. In case of single-layer solid wood panels the modification factors of solid wood shall be applied In case of multi-layer solid wood panels the modification factors of plywood shall be applied. For chemically or thermally treated wood the kmodand kd

41、effactors of EN 1995-1-1 can not be used. The factors have to be found by testing according to ENV 1156. Table 2 Characteristic values of single-layer solid-wood panels complying with EN 13353 Thickness, mm Characteristic density (kg/m) and strength (N/mm) values, mean modulus of elasticity (N/mm) t

42、nomDensity Panel bending parallel to the grain direction mEm0 0 20 to 30 410 40 10 000 The 5 % characteristic values for stiffness should be taken as 0,85 times the mean values given in Table 2. Other properties not given in Table 2 shall comply with the requirements given in EN 13353. For bending p

43、erpendicular to the grain, tension, compression and shear the characteristic values of C24 according to EN 338 shall be applied. Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 16/12/2009 02:23, Uncontrolled Copy, (c) BSIBS EN 12369-3:2008EN 12369-3:2008 (E) 8 Table 3 Characteristic values of

44、 multi-layer solid wood panels complying with EN 13353 Thickness, mm Density Characteristic density (kg/m3) und strength (N/mm2) Panel bending Planar bending Tension Compression Panel shear Planar shear tnom mptcvr0 90 0 90 0 90 0 90 0 90 0 90 12 to 20 410 35 5 25 12 16 6 16 10 4 5 1,6 1,4 20 to 30

45、410 30 5 14 12 9 6 16 10 4 3,5 1,6 1,4 30 to 42 410 16 9 12 12 6 6 10 16 3,5 2,5 1,2 1,4 42 410 12 9 10 12 6 6 10 16 2,5 2 1,2 1,4 Thickness, mm Mean stiffness values (N/mm2) Panel bending Planar bending Tension Panel shear Planar shear tnomEmEpEtGvGr0 90 0 90 0 90 0 90 0 90 12 to 20 10 000 550 4 70

46、0 3 500 4 700 2 900 470 470 41 41 20 to 30 8 200 550 2 900 3 500 3 500 2 900 470 470 41 41 30 to 42 7 600 1 500 2 400 4 700 2 400 2 900 470 470 41 41 42 7 100 1 500 1 800 4 700 2 400 2 900 470 470 41 41 The 5 % characteristic values for stiffness should be taken as 0,85 times the mean values given i

47、n Table 3. Other properties not given in Table 3 shall comply with the requirements given in EN 13353. Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 16/12/2009 02:23, Uncontrolled Copy, (c) BSIBS EN 12369-3:2008EN 12369-3:2008 (E) 9 Annex A (informative) Presentation of characteristic value

48、s Solid wood panels complying with EN 13986 according to the technical class SWP/ _ for use in service class. according to EN 1995-1-1 manufactured by . The characteristic values specified below have been determined pursuant to EN 789 and EN 1058 or they are as specified in EN 12369-3 (Delete which

49、is inapplicable.) Thickness (mm) Number of layers Characteristic strength (N/mm2) and density (kg/m3) Raw density Panel Bending Planar Bending Tension Com-pression Panel Shear Planar Shear fmfpftfcfvfr0 90 0 90 0 90 0 90 0 90 0 90 Thickness (mm) Mean stiffness values (N/mm2) Panel bending Planar bending Tension Panel Shear Planar ShearEmEpEtGvGr0 90 0 90 0 90 0 90 0 90 NOTE The 5 % characteristic values for stiffness should be taken as 0,85 times the above specified mean values. The mean density o