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 panelsThis British Standardwas published underthe authority of theStandards Policy andStrategy Committee
2、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 12369-3:2008.The UK participation in its preparation was entrusted to TechnicalCommittee B/541, Wood ba
3、sed 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 are responsible for its correct application.Compliance with a British Standard cannot confer immun
4、ityfrom legal obligations.BS EN 12369-3:2008EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 12369-3November 2008ICS 79.060.99English VersionWood-based panels - Characteristic values for structural design- Part 3: Solid-wood panelsPanneaux base de bois - Valeurs caractristiques pour laconception de
5、s structures - Partie 3: Bois panneautsHolzwerkstoffe - Charakteristische Werte fr dieBerechnung und Bemessung 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 sti
6、pulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. 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 e
7、xists in three official versions (English, French, German). A version in any other language made by translationunder 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 b
8、odies 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 Kingdom.EUR
9、OPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement 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: EBS EN 12369-3:2
10、008EN 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-beari
11、ng panels for use in all service classes 7 Annex A (informative) Presentation of characteristic values .9 Bibliography . 10 BS EN 12369-3:2008EN 12369-3:2008 (E) 3 Foreword This document (EN 12369-3:2008) has been prepared by Technical Committee CEN/TC 112 “Wood-based panels”, the secretariat of whi
12、ch 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 national standards shall be withdrawn at the latest by May 2009. Attention is drawn to the possibility
13、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 intended to be used in conjunction with EN 1995-1-1. This European Standard is one of a series spe
14、cifying 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 Regulations, the national standards organizations of the following countries are bound to implement t
15、his European Standard: 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 th
16、e United Kingdom. BS EN 12369-3:2008EN 12369-3:2008 (E) 4 1 Scope This European Standard provides information 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 t
17、he characteristic values of the mechanical properties and of the raw density for solid-wood panels complying 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 ref
18、erences, 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 789, Timber structures Test methods Determination of mechanical properties of wood based panels EN 1058, Wo
19、od-based panels Determination of characteristics values of mechanical properties and density EN 1995-1-1, 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, Sol
20、id wood panels Classification by surface appearance Part 2: Hardwood EN 13353:2008, Solid wood panels (SWP) 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 cha
21、racteristic strength value population 5-percentile value obtained from the results of tests with a duration 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-
22、percentile or the mean value obtained of tests with a duration 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 % NOTE The stiffness values given in the Tables are mean values as these are most commonly used in design. A n
23、ote in Annex A explains how to calculate the 5-percentile value. 3.1.1.3 characteristic density population 5-percentile value with mass and volume corresponding to equilibrium moisture content at a temperature of 20 C and a relative humidity of 65 % BS EN 12369-3:2008EN 12369-3:2008 (E) 5 3.1.2 serv
24、ice classes 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.
25、2 service 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 se
26、rvice 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
27、 of the 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 Ex
28、amples 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 l
29、oad should 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 BS EN 12369-3:2008EN 12369-3:2008 (E) 6 k Retention in strength (kmod) or stiffne
30、ss (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 the outer layer of SWP 3.2.2 Subscripts mBending, panel tTension cCompression pBending, plan
31、ar 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. These values may be presented in the format as shown in Annex A or similar to it. Alternatively
32、, 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 shown in Annex A or similar to it. Additionally, these characteristic values shall be supported
33、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 the panel structure. 5 Characteristic values for solid wood panels 5.1 Introduction This clause
34、 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 BS EN 12369-3:2008EN 12369-3:2008 (E) 7 been determined using the sampling techniques as set out
35、 in EN 1058 and the testing procedures given in EN 789. The minimum appearance class of the panels shall be 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 characteris
36、tic values of the mechanical properties and of the density as specified in Tables 2 and 3 apply. The mechanical 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
37、mechanical properties as specified in Tables 2 and 3 require to be modified (kmod, kdef) to EN 1995-1-1 for 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 t
38、he modification factors of plywood shall be applied. For chemically or thermally treated wood the kmodand kdeffactors 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
39、 Thickness, mm Characteristic density (kg/m) and strength (N/mm) values, mean modulus of elasticity (N/mm) tnomDensity 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
40、2. Other properties not given in Table 2 shall comply with the requirements given in EN 13353. For bending perpendicular to the grain, tension, compression and shear the characteristic values of C24 according to EN 338 shall be applied. BS EN 12369-3:2008EN 12369-3:2008 (E) 8 Table 3 Characteristic
41、values of 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
42、20 to 30 410 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
43、 550 4 700 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 value
44、s given in Table 3. Other properties not given in Table 3 shall comply with the requirements given in EN 13353. BS EN 12369-3:2008EN 12369-3:2008 (E) 9 Annex A (informative) Presentation of characteristic values Solid wood panels complying with EN 13986 according to the technical class SWP/ _ for us
45、e 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 is inapplicable.) Thickness (mm) Number of layers Characteristic strength (N/mm2) and dens
46、ity (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 % chara
47、cteristic values for stiffness should be taken as 0,85 times the above specified mean values. The mean density of the panel should be taken as 1,1 times the above specified characteristic values. The other properties are stipulated in EN 13353. BS EN 12369-3:2008EN 12369-3:2008 (E) 10 Bibliography 1
48、 EN 310, Wood-based panels Determination of modulus of elasticity in bending and of bending strength 2 EN 323, Wood-based panels Determination of density 3 EN 1072, Plywood Description of bending properties for structural plywood 4 EN 12369-1, Wood-based panels Characteristic values for structural d
49、esign Part 1: OSB, particleboards and fibreboards 5 EN 12369-2, Wood-based panels Characteristic values for structural design Part 2: Plywood 6 prEN 13354, Solid wood panels Bonding quality Test method 7 EN 13986, Wood-based panels for use in construction Characteristics, evaluation of conformity and marking BS EN 12369-3:2008This page has been intentionally left blank
