1、BRITISH STANDARDBS EN 300:2006Oriented Strand Boards (OSB) Definitions, classification and specificationsThe European Standard EN 300:2006 has the status of a British StandardICS 79.060.20g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51
2、g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 300:2006This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 August 2006 BSI 2006ISBN 0 580 49105 6National forewordThis British Standard was publishe
3、d by BSI. It is the UK implementation of EN 300:2006. It supersedes BS EN 300:1997 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee B/541, Wood based panels.A list of organizations represented on B/541 can be obtained on request to its secretary.This pu
4、blication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.Amendments issued since publicationAmd. No. Date CommentsEUROPEAN STANDARDNORME EUROPEN
5、NEEUROPISCHE NORMEN 300July 2006ICS 79.060.20 Supersedes EN 300:1997 English VersionOriented Strand Boards (OSB) - Definitions, classification andspecificationsPanneaux de lamelles minces, longues et orientes (OSB)- Dfinitions, classification et exigencesPlatten aus langen, flachen, ausgerichteten S
6、pnen (OSB)- Definitionen, Klassifizierung und AnforderungenThis European Standard was approved by CEN on 24 May 2006.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
7、 alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat 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 Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hu
9、ngary, 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 NORMUNGManagement Centre:
10、rue de Stassart, 36 B-1050 Brussels 2006 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 300:2006: E2 Contents Page Foreword4 1 Scope 5 2 Normative references 5 3 Terms and definitions .6 4 Classification of boards 7 5 General requir
11、ements for all OSB types .7 6 Requirement values.9 7 Requirements for non load-bearing boards, general purpose boards and boards for interior fitments for use in dry conditions (Type OSB/1) 9 8 Requirements for load-bearing boards for use in dry conditions (Type OSB/2) 10 9 Requirements for load-bea
12、ring boards for use in humid conditions (Type OSB/3) .11 9.1 General11 9.2 Mechanical and swelling properties 11 9.3 Moisture resistance .11 10 Requirements for heavy duty load-bearing boards for use in humid conditions (Type OSB/4) .12 10.1 General12 10.2 Mechanical and swelling properties 13 10.3
13、Moisture resistance .13 11 Verification of compliance 14 11.1 General14 11.2 External control, and inspection of an isolated lot 14 11.3 Factory production control.15 12 Marking .15 12.1 Boards marketed within the European Economic Area for construction applications15 12.2 Other boards 16 Annex A (n
14、ormative) EN 1087-1 (Modified procedure) 17 Annex B (normative) Voluntary colour coding system for OSB.18 Annex C (normative) Supplementary properties19 Bibliography 20 Tables Table 1 General requirements for all OSB types 8 Table 2 Non load-bearing boards, general purpose boards and boards for inte
15、rior fitments for use in dry conditions Requirements for specified mechanical and swelling properties .9 Table 3 Load-bearing boards for use in dry conditions Requirements for specified mechanical and swelling properties10 Table 4 Load-bearing boards for use in humid conditions Requirements for spec
16、ified mechanical and swelling properties11 Table 5 Load-bearing boards for use in humid conditions Requirements for moisture resistance .12 EN 300:20063 Table 6 Heavy duty load-bearing boards for use in humid conditions Requirements for specified mechanical and swelling properties.13 Table 7 Heavy d
17、uty load-bearing boards for use in humid conditions Requirements for moisture resistance.14 Table 8 Maximum intervals between tests for each production line15 Table B.1 Voluntary colour coding for OSB .17 Table C.1 - Supplementary properties and test methods.18 EN 300:20064 Foreword This document (E
18、N 300:2006) has been prepared by Technical Committee CEN/TC 112 “Wood-based pan-els”, 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 January 2007, and con
19、flicting national standards shall be withdrawn at the latest by January 2007. This document supersedes EN 300:1997. The following principal modifications have been made: a) thickness ranges for board types OSB/2, OSB/3 and OSB/4 have been extended; b) requirements for moisture resistance have been a
20、dapted; c) requirements for the marking of boards have been simplified, taking account of the fact that EN 13986 now describes the detailed requirements for CE marking of boards for use in construction; d) former Annexes E (list of approval numbers for option 2 board types with certain adhesives or
21、adhesive systems) and F (A-deviations) have been deleted. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Den-mark, Estonia, Finland, France, Ge
22、rmany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxem-bourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzer-land and United Kingdom. EN 300:20065 1 Scope This European Standard applies to Oriented Strand Boards (OSB). It defines
23、terms, establishes a classification and specifies requirements. The values listed in this European Standard relate to product properties but they are not characteristic values to be used in design calculations. NOTE Test methods for determination of mechanical properties for structural purposes are
24、given in EN 789. Determination of characteristic values of mechanical properties and density for structural purposes is given in EN 1058. Design characteristic values for OSB are given in EN 12369-1. Information on supplementary properties is given in Annex C. 2 Normative references The following re
25、ferenced 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 document (including any amendments) applies. EN 120, Wood-based panels - Determination of formaldehyde content
26、 - Extraction method called the perforator method EN 310, Wood-based panels - Determination of modulus of elasticity in bending and of bending strength EN 317, Particleboards and fibreboards - Determination of swelling in thickness after immersion in water EN 318, Wood-based panels - Determination o
27、f dimensional changes associated with changes in relative hu-midity EN 319, Particleboards and fibreboards - Determination of tensile strength perpendicular to the plane of the board EN 320, Fibreboards - Determination of resistance to axial withdrawal of screws EN 321, Wood based panels - Determina
28、tion of moisture resistance under cyclic test conditions 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 32
29、4-2, Wood-based panels - Determination of dimension 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
30、, cutting and inspectionPart 2: Quality control in the factory EN 326-3, Wood-based panels - Sampling, cutting and inspection - Part 3: Inspection of an isolated lot of panels EN 594, Timber structures - Test methods - Racking strength and stiffness of timber frame wall panels EN 300:20066 EN 596, T
31、imber structures - Test methods - Soft body impact test of timber framed walls EN 717-1, Wood-based panels - Determination of formaldehyde release - Part 1: Formaldehyde emission by the chamber method EN 789, Timber structures - Test methods - Determination of mechanical properties of wood-based pan
32、els EN 1058, Wood-based panels - Determination of characteristic values of mechanical properties and density EN 1087-1, Particleboards - Determination of moisture resistance - Part 1: Boil test ENV 1156, Wood-based panels - Determination of duration of load and creep factors EN 1195, Timber structur
33、es - Test methods - Performance of structural floor decking EN 12369-1, Wood-based panels - Characteristic values for structural design - Part 1: OSB, particleboards and fibreboards EN 12871, Wood-based panels - Performance specifications and requirements for load bearing boards for use in floors, w
34、alls and roofs EN 13986:2004, Wood-based panels for use in construction - Characteristics, evaluation of conformity and marking 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 13986:2004 and the following apply. 3.1 Oriented Strand Board (OSB) multi-l
35、ayered board mainly made from strands of wood together with a binder. The strands in the external layer are aligned and parallel to the board length or width. The strands in the internal layer or layers can be randomly orientated or aligned, generally at right angles to the strands in the external l
36、ayers 3.2 strand piece of wood of a predetermined shape with a length of more than 50 mm and a typical thickness of less than 2 mm 3.3 major axis direction in the plane of the board in which the bending properties have the higher values 3.4 minor axis direction in the plane of the board at right ang
37、les to the major axis 3.5 dry conditions conditions corresponding to service class 1 of EN 1995-1-1 which is 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 EN 300:2
38、0067 3.6 humid conditions conditions corresponding to service class 2 of EN 1995-1-1 which is 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 85 % for a few weeks per year 4 Classification of boa
39、rds Four types of board are classified and are distinguished as follows: OSB/1 general purpose non load-bearing boards, and boards for interior fitments for use in dry conditions; OSB/2 load-bearing boards for use in dry conditions; OSB/3 load-bearing boards for use in humid conditions; OSB/4 heavy
40、duty load-bearing boards for use in humid conditions. NOTE Load-bearing boards are intended for use in the design and construction of load-bearing or stiffening building elements e.g. walls, flooring, roofing and I-beams (see EN 1995-1-1 and/or performance standards) for use in dry or humid conditio
41、ns 5 General requirements for all OSB types Oriented Strand Boards shall comply with the general requirements listed in Table 1 when dispatched from the producing factory. NOTE On delivery of OSB panels, their moisture content should be determined prior to use, and allowed to come into equilibrium w
42、ith the ambient climatic conditions. EN 300:20068 Table 1 General requirements for all OSB types No. Property Testmethod Requirement 1 a bTolerances on nominal dimensions: thickness (sanded within and between boards; thickness (un-sanded) within and between boards; length and width EN 324-1 0,3 mm 0
43、,8 mm 3,0 mm 2 a bEdge straightness tolerance EN 324-2 1,5 mm/m 3 a bSquareness tolerance EN 324-2 2,0 mm/m 4 aMoisture content EN 322 2 % to 12 % 5 bTolerance on the mean density within a board EN 323 15 % 6 eFormaldehyde release according to EN 13986 Class E 1Perforator value fSteady state emissio
44、n value cEN 120 EN 717-1 Content 8 mg/100 g oven dry board d Release 0,124 mg/m3air Class E 2Perforator value fSteady state emission value EN 120 EN 717-1 Content 8 mg/100 g oven dry board d 30 mg/100 g oven dry board Release 0,124 mg/m3air aCertain users of OSB can require other tolerances (see sep
45、arate performance standards, e.g. EN 12871). bThese values are characterised by a moisture content in the material corresponding to a relative humidity of 65 % and a temperature of 20 C. cExperience has shown that to ensure compliance with the limit for class E1 the rolling average of the EN 120 val
46、ues found from the factory production control over a period of six months should not exceed 6,5 mg formaldehyde 100 g panel mass for OSB. dInitial type testing may be carried out for formaldehyde class E1 (established products only) on the basis of existing data with either EN 120 or pr EN 717-1 tes
47、ting, either from factory production control or from external inspection, see EN 13986. eFor more detail concerning the formaldehyde classes and requirements, see EN 13986. fThe perforator values apply to boards with moisture content H of 6,5 %. In the case of boards with different moisture content
48、(in the range of 3 % H 10 %) the perforator value shall be multiplied by a factor F which can be calculated from the following equation: F= 0,133 H + 1,86. EN 300:20069 6 Requirement values The values which are given in Tables 2 to 7, determined by the relevant test methods as listed in Clauses 7 to
49、 10, are to be used for factory production control (FPC) purposes only and shall not be used in design calculations. With the exception of the moisture resistance requirements in Tables 5 and 7 and the swelling in thickness requirements given in Tables 2 to 4 and 6, the values given in Tables 2 to 7 are characterised by a moisture content in the material corresponding to a relative humidity of 65 % and a temperature of 20 C. The values for the moisture resistance requirements in Tables 5 and 7 and swelling in thic
