1、BRITISH STANDARD BS EN 12369-1:2001 Wood-based panels Characteristic values for structural design Part 1: OSB, particleboards and fibreboards The European Standard EN 12369-1:2001 has the status of a British Standard ICS 79.060.20 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LA
2、WBS EN 12369-1:2001 This British Standard, having been prepared under the direction of the Sector Committee for Building and Civil Engineering, was published under the authority of the Standards Committee and comes into effect on 15 March 2001 BSI 03-2001 ISBN 0 580 36993 5 National foreword This Br
3、itish Standard is the official English language version of EN 12369-1:2001. The UK participation in its preparation was entrusted to Technical Committee B/541, Wood-based panels, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its
4、secretary. Users should note that the terminology and notation used in EN 12369-1 is different from that used for solid timber and different from that previously used in the UK for wood-based panels in BS 5268-2. The symbols used are explained in 3.2 and users should note that the subscripts “0” and
5、 “90” are used to denote the major and minor axes of OSB. Bending properties are for flatwise bending, and for OSB the “0” is with the major axis parallel to the span and “90” is with the minor axis parallel to the span. No corresponding values are given for edgewise bending. The tension and compres
6、sion properties given are both for in-plane stresses. No values are given for perpendicular to the plane of the panel. The term panel shear is for in-plane shear which tends to transform a rectangular section of a panel into a lozenge shape, as in the web of an I-beam. The term planar shear is also
7、in-plane and occurs in flatwise bending and between glued components. It refers to stresses tending to cause layers of the panel to slide over one another. In BS 5268-2, this property is referred to as rolling shear. Cross-references The British Standards which implement international or European pu
8、blications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary p
9、rovisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible European committee any enquiries on the in
10、terpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 14, an inside back cover and
11、a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12369-1 January 2001 ICS 79.060.00 English version Wood based panels Characteris
12、tic values for structural design Part 1: OSB, particleboards and fibreboards Panneaux base de bois Valeurs caractristiques pour la conception des structures Partie 1: OSB, panneaux de particules et panneaux de fibres Holzwerkstoffe Charakteristiche Werte fr die Berechnung und Bemessung von Holzbauwe
13、rken Teil 1: OSB, Spanplatten und Faserplatten This European Standard was approved by CEN on 3 December 2000. 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 alter
14、ation. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the 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 translat
15、ion under the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy
16、, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2001 CEN All rights of exploitation in any form and
17、by any means reserved worldwide for CEN national Members. Ref. No. EN 12369-1:2001 EPage 2 EN 12369-1:2001 BSI 03-2001 Contents Page Foreword . 2 1 Scope . 3 2 Normative references . 3 3 Terms and definitions and symbols 4 3.1 Terms and definitions . 4 3.2 Symbols . 5 4 General . 5 5 Characteristics
18、 values 6 5.1 Introduction . 6 5.2 OSB (EN 300) . 6 5.3 Particleboards (EN 312) 7 5.4 Fibreboards (EN 622 parts 2 and 3) . 10 5.5 MDF (EN 622-5) 12 Annex A (informative) Format for the presentation of the characteristic values 14 Foreword This European Standard has been prepared by Technical Committ
19、ee 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 July 2001, and conflicting national standards shall be withdrawn at the l
20、atest by July 2001. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Neth
21、erlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. This standard is intended to be used in conjunction with ENV 1995-1-1. No existing European Standard is superseded. Annex A is informative.Page 3 EN 12369-1:2001 BSI 03-2001 1 Scope This European Standard provides informat
22、ion on the characteristic values for use in designing structures incorporating wood based panels. The characteristic values given are as defined in ENV 1995-1-1. This standard includes the characteristic values of both the mechanical properties and density for the panels set out below: OSB/2, OSB/3
23、and OSB/4, complying with EN 300; Particleboard, P4, P5, P6, P7 complying with EN 312 Parts 4 to 7; Hardboard, HB.HLA2 complying with EN 622-2; Medium board, MBH.LA2 complying with EN 622-3; MDF.LA and MDF.HLS complying with EN 622-5. Characteristic values for plywood, solid wood panels, laminated v
24、eneer lumber (LVL) and cement bonded particleboards will be provided in one or more further parts of this standard. 2 Normative references This European Standard incorporates, by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate p
25、laces in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any 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 r
26、eferred to applies (including amendments). EN 300, Oriented Strand Boards (OSB) Definitions, classification and specifications. EN 312-4, Particleboards Specifications Part 4: Requirements for load-bearing boards for use in dry conditions. EN 312-5, Particleboards Specifications Part 5: Requirements
27、 for load-bearing boards for use in humid conditions. EN 312-6, Particleboards Specifications Part 6: Requirements for heavy duty load-bearing boards for use in dry conditions. EN 312-7, Particleboards Specifications Part 7: Requirements for heavy duty load-bearing boards for use in humid conditions
28、. EN 323, Wood-based panels Determination of density. EN 622-2, Fibreboards Specifications Part 2: Requirements for hardboards. EN 622-3, Fibreboards Specifications Part 3: Requirements for medium boards. EN 622-5, Fibreboards Specifications Part 5: Requirements for dry process boards (MDF). EN 789,
29、 Timber structures Test methods Determination of mechanical properties of wood based panels. EN 1058, Wood based panels Determination of characteristic values of mechanical properties and density. ENV 1995-1-1 Eurocode 5 Design of timber structures Part 1-1: General rules and rules for buildings.Pag
30、e 4 EN 12369-1:2001 BSI 03-2001 3 Terms and definitions and symbols 3.1 Terms and definitions For the purposes of this European Standard, the following terms and definitions apply: 3.1.1 characteristic values Characteristic strength values are defined as the population 5-percentile values obtained f
31、rom 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 %. Characteristic stiffness values are defined as either the population 5-percentile or the mean values obtained under the same test
32、 conditions as defined above. The stiffness values given in the tables are mean values as these are most commonly used in design. A note below each of the tables explains how to calculate the 5-percentile value. The characteristic density is defined as the population 5-percentile value with mass and
33、 volume corresponding to equilibrium moisture content at a temperature of 20 C and a relative humidity of 65 %. This value is used in the design of joints in association with ENV 1995-1-1. 3.1.2 service classes three service classes are defined in ENV 1995-1-1. These are: service class 1: characteri
34、zed by a moisture content in the materials corresponding to a temperature of 20 C and the relative humidity of the surrounding air only exceeding 65 % for a few weeks per year. service class 2: characterized by a moisture content in the materials corresponding to a temperature of 20 C and the relati
35、ve humidity of the surrounding air only exceeding 85 % for a few weeks per year. service class 3: climatic conditions leading to higher moisture contents than in service class 2. 3.1.3 load-duration classes For strength and stiffness calculations, actions are assigned to one of the load-duration cla
36、sses given in Table 1 (see ENV 1995-1-1). The load-duration classes are characterized by the effect of a constant load acting for a certain period of time in the life of the structure. For a variable action the appropriate class is determined on the basis of an estimate of the interaction between th
37、e typical variation of the load with time and the rheological properties of the materials. Table 1 Load-duration classes Load-duration class Order of accumulated duration of characteristic load Examples of loading Permanent more than 10 years self weight Long-term 6 months to 10 years storage Medium
38、-term 1 week to 6 months imposed load Short-term less than on week snow aand wind Instantaneous accidental load aIn areas which have a heavy snow load for a prolonged period of time, part of the load should be regarded as medium-termPage 5 EN 12369-1:2001 BSI 03-2001 3.2 Symbols In the tables the fo
39、llowing symbols are used: 3.2.1 main symbols f strength; E modulus of elasticity (defined as stiffness in ENV 1995-1-1); G modulus of rigidity; k retention in strength (k mod ) or stiffness (k def ) after a period of time relative to initial values. Values are included in ENV 1995-1-1; t thickness;
40、density as measured according to EN 323; / or 0 in the direction of the major axis of OSB; or 90 in the direction of the minor axis of OSB. 3.2.2 subscripts m bending; t tension; c compression; v panel shear; r planar shear; nom nominal; mod strength; def deflection. 4 General The characteristic val
41、ues given in this standard are the minimum values applicable to products conforming to the appropriate EN specification standards. Suppliers may present these values in a format similar to that in annex A. Alternatively, characteristic values other than those contained in this standard shall be dete
42、rmined using sampling techniques set out in EN 1058 and testing procedures given in EN 789, and declared in a format similar to that in annex A. These characteristic values shall be supported by the following information: the product description; the product specification and part number; the servic
43、e class or classes in which the panel can be used. The characteristic values given in this standard are either different from the requirements given in the specification standard for each type of panel product, due to differences in test methodology or size of test piece used (as in the case of bend
44、ing strength and modulus of elasticity), or are absent from the specification standards (as in the case of shear, in plane tension and compression).Page 6 EN 12369-1:2001 BSI 03-2001 5 Characteristic values 5.1 Introduction This clause gives information on the characteristic values of both mechanica
45、l properties and density for those wood based panels the values of which, unless specified to the contrary, have been determined using the sampling techniques set out in EN 1058 and the testing procedures given in EN 789. 5.2 OSB (EN 300) This subclause gives the minimum characteristic values for OS
46、B complying with EN 300. 5.2.1 EN 300: OSB/2: Load-bearing boards for use in dry conditions and OSB/3: Load-bearing boards for use in humid conditions When OSB/2 and OSB/3 are used structurally under service class 1 conditions, the characteristic values of the mechanical properties and density given
47、 in Table 2 shall apply. These require to be modified according to ENV 1995-1-1 for duration of load (k mod , k def ). When OSB/3 is used structurally under service class 2 conditions, the characteristic values of the mechanical properties and density given in Table 1 shall be modified according to
48、ENV 1995-1-1 for both service class and duration of load (k mod , k def ). Table 2 Characteristic values of boards complying with EN 300: OSB/2: Load bearing boards for use in dry conditions, and OSB/3: Load bearing boards for use in humid conditions Thickness, mm Characteristic density (kg/m 3 ) an
49、d strength (N/mm 2 ) values Density Bending Tension Compression Panel Shear Planar Shear t nom f m f t f c f v f r 09 009 009 0 6 to 10 550 18,0 9,0 9,9 7,2 15,9 12,9 6,8 1,0 10 to 18 550 16,4 8,2 9,4 7,0 15,4 12,7 6,8 1,0 18 to 25 550 14,8 7,4 9,0 6,8 14,8 12,4 6,8 1,0 Thickness, mm Mean stiffness values, N/mm 2 Bending Tension Compression Panel Shear Planar Shear t nom E m E t E c G v G r 09 009 009 0 6 to 10 4 930 1 980 3 800 3 000 3 800 3 000 1 080 50 10 to 18 4 930 1 980
