1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationPlywood SpecificationsBS EN 636:2012Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted w
2、ithout license from IHS-,-,-National forewordThis British Standard is the UK implementation of EN 636:2012. It supersedes BS EN 636:2003 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee B/541, Wood based panels.A list of organizations represented on thi
3、s committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2013.Published by BSI Standards Limited 2013 ISBN 978 0 580 72801 3 IC
4、S 79.060.10Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 January 2013.Amendments issued since publicationDate Text affectedBRITISH STANDARDBS EN 636:2012Cop
5、yright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 636 September 2012 ICS 79.060.10 Supersedes EN 636:2003English Version Plywood -
6、 Specifications Contreplaqu - Exigences Sperrholz - Anforderungen This European Standard was approved by CEN on 11 August 2012. 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
7、 without any alteration. Up-to-date lists and bibliographical 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 o
8、ther language made by translation under the responsibility 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 Republi
9、c, 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, Turkey and United Kingdom. EUROPEAN CO
10、MMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 636:2012: EBS EN 636:2012Copyright
11、European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-EN 636:2012 (E) 2 Contents Page Foreword 31 Scope 42 Normative references 43 Terms and definitions .54 Symbols and subscripts .65 Classifica
12、tion system 66 General requirements 86.1 Tolerances on dimensions .86.2 Mechanical characteristics .86.2.1 General purpose (non-structural application) 86.2.2 Structural application 96.3 Formaldehyde release 96.3.1 Classification 96.3.2 Conditioning of test pieces 107 Requirements for plywood for us
13、e in dry conditions . 107.1 Bonding quality . 107.2 Biological durability . 108 Requirements for plywood for use in humid conditions 118.1 Bonding quality . 118.2 Biological durability . 119 Requirements for plywood for use in exterior conditions 119.1 Bonding quality . 119.2 Biological durability .
14、 1110 Supplementary properties . 1111 Verification of compliance . 1111.1 General . 1111.2 External control . 1111.3 Factory production control 1212 Marking, identification and documentation . 1212.1 Boards marketed within the European Economic area for construction applications . 1212.2 Other board
15、s . 12Annex A (normative) Supplementary properties 14Bibliography . 15BS EN 636:2012Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-EN 636:2012 (E) 3 Foreword This document (EN 6
16、36:2012) 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 March 2013, and conflicti
17、ng national standards shall be withdrawn at the latest by March 2013. 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 document su
18、persedes EN 636:2003. Compared to EN 636:2003, the following modifications have been made: a) classification system for bending strength and bending modulus completed with classes F 35 and E 35; b) limit values in Table 2 changed; c) letter indicating the intended application changed from “G“ to “NS
19、“; d) marking of formaldehyde release revised in accordance with EN 13986; According to the CEN/CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, De
20、nmark, 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, Turkey and the United Kingdom. BS EN 636:20
21、12Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-EN 636:2012 (E) 4 1 Scope This European Standard specifies the requirements for plywood, as defined in EN 313-2, for both genera
22、l purpose use (non-structural application) and structural application in dry, humid or exterior conditions. It also gives a classification system based on the bending properties. NOTE 1 This European Standard is referenced in EN 13986 for construction applications. NOTE 2 For additional guidance on
23、application, information is provided in CEN/TS 1099. The values listed under Clause 4 relate only to product properties; they are not characteristic values and are not to be used in design calculations. NOTE 3 Characteristic values (i.e. for use in design calculation according to EN 1995-1-1) are gi
24、ven either in EN 12369-2 which is based on the classification system given in this standard or by the manufacturer based on testing according to EN 789, EN 1058 and ENV 1156. Additional information on supplementary properties for certain applications is also given. 2 Normative references The followi
25、ng documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 310, Wood-based
26、 panels Determination of modulus of elasticity in bending and of bending strength EN 314-1, Plywood Bonding quality Part 1: Test methods EN 314-2, Plywood Bonding quality Part 2: Requirements EN 315, Plywood Tolerances for dimensions EN 318, Wood-based panels Determination of dimensional changes ass
27、ociated with changes in relative humidity EN 322, Wood-based panels Determination of moisture content EN 323, Wood-based panels Determination of density EN 324-1, Wood-based panels Determination of dimensions of boards Part 1: Determination of thickness, width and length EN 324-2, Wood-based panels
28、Determination of dimensions of boards Part 2: Determination of squareness and edge straightness EN 326-1, Wood-based panels Sampling, cutting and inspection Part 1: Sampling and cutting of test pieces and expression of test results EN 326-2, Wood-based panels - Sampling, cutting and inspection - Par
29、t 2: Initial type testing and factory production control EN 326-3, Wood based panels Sampling, cutting and inspection Part 3: Inspection of an isolated lot of panels BS EN 636:2012Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or
30、networking permitted without license from IHS-,-,-EN 636:2012 (E) 5 EN 335-3:1995, Durability of wood and wood-based products Definition of hazard classes of biological attack Part 3: Application to wood-based panels EN 594, Timber structures Test methods Racking strength and stiffness of timber fra
31、me wall panels EN 596, Timber structures Test methods Soft body impact test of timber framed walls EN 635-1, Plywood Classification by surface appearance Part 1: General EN 635-2, Plywood Classification by surface appearance Part 2: Hardwood EN 635-3, Plywood Classification by surface appearance Par
32、t 3: Softwood CEN/TS 635-4, Plywood Classification by surface appearance Part 4: Parameters of ability for finishing, Guideline EN 635-5, Plywood Classification by surface appearance Part 5: Methods for measuring and expressing characteristics and defects EN 717-1, Wood-based panels Determination of
33、 formaldehyde release Part 1: Formaldehyde emission by the chamber method EN 717-2, Wood-based panels Determination of formaldehyde release Part 2: Formaldehyde release by the gas analysis method EN 789, Timber structures Test methods Determination of mechanical properties of wood based panels EN 10
34、58, Wood-based panels Determination of characteristic 5-percentile values and characteristic mean values ENV 1156, Wood-based panels Determination of duration load and creep factors EN 1195, Timber structures Test methods Performance of structural floor decking EN 12369-2, Wood-based panels Characte
35、ristic values for structural design Part 2: Plywood EN 13446, Wood-based panels Determination of withdrawal capacity of fasteners EN 13810-1, Wood-based panels Floating floors Part 1: Performance specifications and requirements CEN/TS 13810-2, Wood-based panels Floating floors Part 2: Test methods E
36、N 13986, Wood-based panels for use in construction Characteristics, evaluation of conformity and marking EN 14272, Plywood Calculation method for some mechanical properties 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 plywood for use in dr
37、y conditions plywood to be used in conditions characterised by a moisture content in the material corresponding to a temperature of 20 C and a relative humidity of the surrounding air only exceeding 65 % for a few weeks per year Note 1 to entry: These conditions correspond with Service Class 1 accor
38、ding to EN 1995-1-1. BS EN 636:2012Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-EN 636:2012 (E) 6 Note 2 to entry: Boards of this type are suitable for use in Use Class 1 of E
39、N 335-3. 3.2 plywood for use in humid conditions plywood to be used in conditions characterised by a moisture content in the material corresponding to a temperature of 20 C and relative humidity of the surrounding air only exceeding 85 % for a few weeks per year Note 1 to entry: These conditions cor
40、respond with Service Class 2 according to EN 1995-1-1. Note 2 to entry: Boards of this type are suitable for use in Use Class 1 and 2 of EN 335-3. Note 3 to entry: This type of plywood is appropriate for protected external applications (e.g. behind cladding or under roof coverings), but is also capa
41、ble of resisting weather exposure for short periods (e.g. when exposed during the construction). It is also suitable for interior situations where the service moisture condition is raised above humidity of dry conditions. 3.3 plywood for use in exterior conditions plywood to be used in climatic cond
42、itions leading to higher moisture contents than in service class 2 Note 1 to entry: These conditions correspond with Service Class 3 according to EN 1995-1-1. Note 2 to entry: Boards of this type are suitable for use in Use Class 1, 2 and 3 of EN 335-3. Note 3 to entry: This type of plywood is capab
43、le of withstanding exposure to weathering conditions and liquid water, or water vapour in a damp but ventilated location, under consideration of 9.2. 4 Symbols and subscripts E modulus of elasticity (defined as stiffness in EN 1995-1-1), in Newton per square millimetre E class of modulus of elastici
44、ty in bending f strength in Newton per square millimetre F class of bending strength m bending 0 in the direction of the grain of the outer layer of plywood 90 perpendicular to the grain of the outer layer of plywood 5 Classification system All plywood, independent of composition factors (e.g. speci
45、es, number of plies, thickness of plies) can be classified under this system based on bending properties. The classification system may be used as an alternative to the full-scale testing as required by EN 789, for the derivation of characteristic values for plywood, by cross-referencing with EN 123
46、69-2 for the characteristic values of each class listed in Tables 1 and 2. The lower limit values given in Tables 1 and 2 for bending strength and modulus of elasticity in bending correspond to 5 percentile values based on the mean values, determined according to EN 310 and EN 326-2 for individual b
47、oards and calculated in accordance with EN 326-1. These values shall not be used for structural design. BS EN 636:2012Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-EN 636:2012
48、(E) 7 For the determination of the bending properties, see 6.2. Table 1 Bending strength classes for plywood Bending strength Class Lower limit value N/mm2fm, 0fm, 90F 3 5 F 5 8 F 10 15 F 15 23 F 20 30 F 25 38 F 30 45 F 35 52 F 40 60 F 50 75 F 60 90 F 70 105 F 80 120 BS EN 636:2012Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,
