EN 300:2006

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.VSHFLILNDFLMHPlatten aus langen, flachen, ausgerichteten Spänen (OSB) - Definitionen, Klassifizierung und AnforderungenPanneaux de lamelles minces, longues et orientées (OSB) - Définitions, classification et exigencesOriented Strand Boards (OSB) - Definitions, classification and specifications79.060.20Fibre and particle boardsICS:Ta slovenski standard je istoveten z:EN 300:2006SIST EN 300:2006en01-december-2006SIST EN 300:2006SLOVENSKI
STANDARDSIST EN 300:19981DGRPHãþD

EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 300July 2006ICS 79.060.20Supersedes EN 300:1997
English VersionOriented Strand Boards (OSB) - Definitions, classification andspecificationsPanneaux de lamelles minces, longues et orientées (OSB)- Définitions, classification et exigencesPlatten aus langen, flachen, ausgerichteten Spänen (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 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 translationunder 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, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2006 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 300:2006: E

EN 1087-1 (Modified procedure).17 Annex B (normative)
Voluntary colour coding system for OSB.18 Annex C (normative)
Supplementary properties.19 Bibliography.20
Tables Table 1 — General requirements for all OSB types.8 Table 2 — Non load-bearing boards, general purpose boards and boards for interior 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 properties.10 Table 4 — Load-bearing boards for use in humid conditions — Requirements for specified
mechanical and swelling properties.11 Table 5 — Load-bearing boards for use in humid conditions — Requirements for moisture
resistance.12

specified mechanical and swelling properties.13 Table 7 — Heavy duty load-bearing boards for use in humid conditions — Requirements for
moisture resistance.14 Table 8 — Maximum intervals between tests for each production line.15 Table B.1 — Voluntary colour coding for OSB .17 Table C.1 - Supplementary properties and test methods.18

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, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxem-bourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzer-land and United Kingdom.

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 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 referenced 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 - 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 of 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 - Determination 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 324-2, 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, 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

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, walls 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-layered 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 layers 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 angles 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

exceeding 85 % for a few weeks per year 4 Classification of boards 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 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 conditions 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 with the ambient climatic conditions.

boards; — length and width EN 324-1
± 0,3 mm ± 0,8 mm
± 3,0 mm 2 a b Edge straightness tolerance EN 324-2 1,5 mm/m 3 a b Squareness tolerance EN 324-2 2,0 mm/m 4 a Moisture content EN 322 2 % to 12 % 5 b Tolerance on the mean density within a board EN 323 ± 15 % 6 e Formaldehyde release according to EN 13986
— Class E 1
Perforator value f
Steady state emission value c
EN 120
EN 717-1
Content ≤ 8 mg/100 g oven dry board d
Release ≤ 0,124 mg/m3 air
— Class E 2
Perforator value f
Steady 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/m3 air a Certain users of OSB can require other tolerances (see separate performance standards, e.g. EN 12871). b These values are characterised by a moisture content in the material corresponding to a relative humidity of 65 % and a temperature of 20 °C. c Experience has shown that to ensure compliance with the limit for class E1 the rolling average of the EN 120 values 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. d Initial 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 testing, either from factory production control or from external inspection, see EN 13986. e For more detail concerning the formaldehyde classes and requirements, see EN 13986. f The perforator values apply to boards with moisture content H of 6,5 %. In the case of boards with different moisture content (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.

calculations. With the exception of the mo
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