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1、BRITISH STANDARD BS EN 12871:2001 Wood-based panels Performance specifications and requirements for load bearing boards for use in floors, walls and roofs The European Standard EN 12871:2001 has the status of a British Standard ICS 79.060.01; 91.060.01 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PER
2、MITTED BY COPYRIGHT LAW Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 08:57:05 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 12871:2001 This British Standard, having been prepared under the direction of the Sector Committee for Building and Civil Engineering, was published under the auth
3、ority of the Standards Committee and comes into effect on 15 July 2001 BSI 07-2001 ISBN 0 580 37291 X National foreword This British Standard is the official English language version of EN 12871:2001. The UK participation in its preparation was entrusted to Technical Committee B/541, Wood-based pane
4、ls, which has the responsibility to: 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 found in the BSI Standards Catalog
5、ue 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 provisions of a contract. Users of British Standards are responsible for their cor
6、rect 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 interpretation, or proposals for change, and keep the UK interests informed; monito
7、r 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 26, an inside back cover and a back cover. The BSI copyright date displayed in this document indicates when th
8、e document was last issued. Amendments issued since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 08:57:05 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12871 May 2001 ICS 79.060.01 English version Wood-base
9、d panels - Performance specifications and requirements for load bearing boards for use in floors, walls and roofs Panneaux base de bois - Spcifications et exigences fonctionnelles pour panneaux travaillants utiliss en planchers, murs et toitures Holzwerkstoffe - Leistungsspezifikationen und Anforder
10、ungen fr tragende Platten zur Verwendung in Fubden, Wnden und Dchern This European Standard was approved by CEN on 19 February 2001. 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 sta
11、ndard without any alteration. 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 la
12、nguage made by translation 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,
13、Iceland, Ireland, Italy, 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 CENAll rights of exploit
14、ation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12871:2001 E Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 08:57:05 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 2 EN 12871:2001 Contents Page Foreword . . . . . . . . . . . . . . . . . . . . . .
15、. . . . . . . . . . . . . . . . . . . . . . . . . . .2 1 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 2 Normative references . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 3 Terms and definitions . . . . . . . . .
16、. . . . . . . . . . . . . . . . . . . . . . . . . . . .3 4 Symbols and subscripts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 5 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 6 Performance requirements . . . . . . . . .
17、. . . . . . . . . . . . . . . . . . . . . . . .10 7 Sampling and evaluation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19 8 Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19 9 Documentation . . . . . . . . . . . . . . .
18、. . . . . . . . . . . . . . . . . . . . . . . . . . .20 10 Report . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20 Annex A (normative) Normative references . . . . . . . . . . . . . . . . . . . . . . . .21 Annex B (informative) Guidance of installatio
19、n . . . . . . . . . . . . . . . . . . . . .24 Annex C (normative) Wood-based panels Structural roof decking on joists Performance test method . . . . . . . . . . . . . . . . . . . . . . . . . . . .25 Bibliography . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
20、 . .26 Foreword This European Standard 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 lates
21、t by November 2001, and conflicting national standards shall be withdrawn at the latest by November 2001. This European Standard combines the drafts published as prEN 12869-1:1997, prEN 12869-2:1997, prEN 12870-1:1997, prEN 12870-2:1997, prEN 12871-1:1997, prEN 12872-2:1997 and prEN 12871-3:1997. In
22、 the structural use of wood-based panels there are two methods of achieving satisfactory performance of the completed structure. The first approach is to design the structure by calculation using structural characteristic values (contained in EN 12369 or derived accoridng to EN 1058 and EN 789), whe
23、re there are no requirements for impact and concen- trated loads, or where compliance with these requirements can be demonstrated. Subject to the above limitations, the method can be applied to any structure, but because of the method of generation of the various assumptions used in design calculati
24、on, the derived design may not be optimized in terms of performance. The second approach is to design the structure by prototype testing in order to satisfy the requirements for both impact and concentrated loading. This test work is complemented by calculation in order to satisfy the requirement fo
25、r uniformly distributed load. This approach yields a more optimised design, the results from the testing apply only to that one specific design. This standard relates specifically to the second approach, namely, design by prototype testing. Thus, this standard sets out the specifications and require
26、ments for load bearing wood-based panels used as structural floor or roof decking or wall sheathing. No existing European Standard is superseded. The annexes A and C are normative. Annex B is informative. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the
27、following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Licensed Copy: sheffieldun sheffieldu
28、n, na, Sat Oct 28 08:57:05 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 3 EN 12871:2001 1 Scope This European Standard sets out the performance specifications and requirements for load bearing wood-based panels used as structural decking and sheathing in floors, roofs and walls, and provides a me
29、thod of demonstrating compliance based on prototype testing. Reference is also made to general performance requirements for loads not defined in ENV 1991-1, ENV 1991-2-1 or ENV 1995-1-1. Uniformly distributed loads in accordance with ENV 1991-2-1 are not included in this standard; but can be verifie
30、d by calculation according to ENV 1995-1-1, see clause 6. The concept of punching shear is included within this standard. This European Standard also specifies requirements for additional properties for load bearing wood-based panels used as structural decking and sheathing in floors, roofs and wall
31、s, which are not given in other European Standards. 2 Normative references See annex A. 3 Terms and definitions For the purposes of this standard the following terms and definitions apply: 3.1 service classes 3.1.1 service class 1 is characterized by a moisture content in the materials corresponding
32、 to a temperature of 20 C and the relative humidity of the surrounding air only exceeding 65 % for a few weeks per year ENV 1995-1-1 3.1.2 service class 2 is characterized by a moisture content in the materials corresponding to a temperature of 20 C and the relative humidity of the surrounding air o
33、nly exceeding 85 % for a few weeks per year ENV 1995-1-1 3.1.3 service class 3 climatic conditions leading to higher moisture contents than in service class 2 ENV 1995-1-1 3.2 serviceability limit state see ENV 1995-1-1 and ENV 1991-1 3.3 ultimate limit state see ENV 1995-1-1 and ENV 1991-1 3.4 char
34、acteristic value see ENV 1995-1-1 and ENV 1991-1 Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 08:57:05 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 4 EN 12871:2001 3.5 hazard classes see EN 335-1 3.6 load category see ENV 1991-2-1 3.7 structural floor decking an assembly of wood-based p
35、anels supported on joists over which the decking spans. The characteristic of the decking is that it is supported by joists and, when subjected to load, is free to deflect between the joists 3.8 structural wall sheathing wood-based panel capable of providing mechanical resistance to a wall structure
36、 3.9 structural roof decking an assembly of wood-based panels supported on joists over which the roof decking spans. The characteristic of the decking is that it is supported by joists and, when subjected to load, is free to deflect between the joists 3.10 warm roof roof design in which the panels s
37、upported on joists are placed below the insulation. The panels are considered to be under conditions corresponding to service class 1 3.11 cold roof roof design in which the panels and some of the supporting joists are placed above the insulation. The panels are considered to be under conditions cor
38、responding to service class 2 3.12 set residual deformation of the test floor, wall or roof after the removal of the applied load 3.13 sub-floor structural panel meant to be covered by overlays 3.14 racking resistance capacity of a component to resist an in-plane load 3.15 racking stiffness secant s
39、tiffness of a component when it is in-plane loaded to approximately 40 % of its maximum racking resistance Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 08:57:05 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 5 EN 12871:2001 3.16 punching shear the performance of a panel under a concentrat
40、ed load excluding the effect of bending 4 Symbols and subscripts 4.1 Symbols Fdirect action, force (load) applied to structure, in kilonewtons kfaktor Lcentre to centre distance (span) of the joists or studs, in millimetres Qvariable action, concentrated load (imposed load), in kilonewtons Rstiffnes
41、s of the structural decking or sheathing, in kilonewtons per millimetre udeflection, in millimetres partial safety factor 4.2 Subscripts Qactions kcharacteristic mmaterial property defdeformation disdistribution (concentrated load contact area) maxmaximum modmodification serserviceability 055-percen
42、tile 1, 2, 3 service class 1, 2 or 3 in accordance with ENV 1995-1-1 roof slope (angle) ppanel 5 Specifications 5.1 General The specification and parameters included in tables 1 and 2 shall be used for load bearing wood-based panels for structural decking and sheathing in floors, roofs and walls. Li
43、censed Copy: sheffieldun sheffieldun, na, Sat Oct 28 08:57:05 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 6 EN 12871:2001 Table 1 Panel product specification for structural decking and sheathing in floors, roofs and walls CharacteristicsRelevant EN Particleboard service class and gradeEN 312-4/5
44、/6/7 OSB service class and grade main load bearing direction EN 300-OSB/2/3/4 Plywood lay-up wood species and surface appearance class service class main load bearing direction EN 313-1/2 EN 635-1/2/3 EN 636-1/2/3 Solid-wood-panelb Fibreboard service class, type and gradeEN 622-2/3/5 Cement-bonded p
45、articleboarda service classEN 634-2 a Cement-bonded particleboards shall only be used for structural design provided values of kmod and kdef have been determined in accordance with ENV 1156 b To be included when EN specifications are available. Table 2 Parameters to be specified for structural decki
46、ng and sheathing in floors, roofs and walls Design parameterRelevant ENExplanation Span (joist spacing) for floorsEN 1195Determined from the performance test Span (stud spacing) for wallsEN 594 EN 596 Determined from the performance test Span (joist spacing) for roofsAnnex DDetermined from the perfo
47、rmance test Joints the method of supporting the panel edges EN 324-1/2Dimensions According to that used in the performance test type of panel to panel joints (e.g. tongued uis the mean requirement deflection, in millimetres; Rmeanis the mean stiffness of the structural floor or roof decking in kilon
48、ewtons per millimetre found by testing at a specified span in accordance with EN 1195 (floors) or Annex C (roofs); kdef, yis a modification factor for short-term load duration under test. Normally for service class 1 given in ENV 1995-1-1; kdef, xis a modification factor for load duration in service
49、 (kdef, 1; kdef, 2; kdef, 3) depending on the type of wood-based panel, end-use and service class (1, 2 or 3) according to ENV 1995-1-1. Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 08:57:05 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 13 EN 12871:2001 6.2.2.3.4 Roofing covered with bitumen felts or single-ply membrane The usual cause of cracking in roofing felts is that the joints between the panels above supports open up due to loading or drying. u (L e) / 3tfor load category H(3) where: u is the deflection, in millimetre
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