EN 12369-2:2011

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Holzwerkstoffe - Charakteristische Werte für die Berechnung und Bemessung von Holzbauwerken - Teil 2: SperrholzPanneaux à base de bois - Valeurs caractéristiques pour la conception des structures - Partie 2: ContreplaquéWood-based panels - Characteristic values for structural design - Part 2: Plywood79.060.10Vezan lesPlywoodICS:Ta slovenski standard je istoveten z:EN 12369-2:2011SIST EN 12369-2:2011en,fr,de01-oktober-2011SIST EN 12369-2:2011SLOVENSKI
STANDARDSIST EN 12369-2:20041DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 12369-2
June 2011 ICS 79.060.10 Supersedes EN 12369-2:2004English Version
Wood-based panels -Characteristic values for structural design - Part 2: Plywood
Panneaux à base de bois - Valeurs caractéristiques pour la conception des structures - Partie 2: Contreplaqué
Holzwerkstoffe - Charakteristische Werte für die Berechnung und Bemessung von Holzbauwerken - Teil 2: Sperrholz This European Standard was approved by CEN on 11 May 2011.
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 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 other 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 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.
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B-1000 Brussels © 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12369-2:2011: ESIST EN 12369-2:2011

Format for the presentation of characteristic values . 12Annex B (informative)
Information about the conversion factors . 14B.1 Tension – Compression . 14B.1.1 General . 14B.1.2 Strength . 14B.1.3 Modulus of elasticity . 14B.2 Shear properties . 15Bibliography . 17 SIST EN 12369-2:2011

Where optimised values are needed, the characteristic values are determined directly by testing in accordance with EN 789 and EN 1058 or by combination of testing according to the latter two standards and calculation according to prEN 14272.
This European Standard applies to panels complying with the three following conditions:  5 layers or more and 6 mm overall thickness and more;  the ratio of the cumulative thickness of veneers in alternate directions does not exceed 2,5;  wood species with a mean density greater than 350 kg/m3 and not exceeding 750 kg/m3. 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 310, Wood-based panels
Determination of modulus of elasticity in bending and of bending strength EN 323, Wood-based panels
Determination of density
EN 326-2, Wood-based panels
Sampling, cutting and inspection
Part 2: Initial type testing and factory production control EN 635-2, Plywood — Classification by surface appearance — Part 2: Hardwood EN 635-3, Plywood — Classification by surface appearance — Part 3: Softwood EN 636:2003, Plywood
Specifications EN 1995-1-1:2004, Eurocode 5: Design of timber structures — Part 1-1: General — Common rules and rules for buildings ISO 3131, Wood — Determination of density for physical and mechanical tests SIST EN 12369-2:2011

3.2.2 service class 2 conditions of exposure resulting in moisture content in the materials corresponding to a temperature of 20 °C and the relative humidity of the surrounding air exceeding 85 % for only a few weeks per year NOTE
In these conditions the moisture content of coniferous plywood can be expected not to exceed 18 %.
3.2.3 service class 3 conditions of exposure resulting in higher moisture content in the materials than in service class 2
NOTE In these conditions the moisture content of coniferous plywood can be expected to exceed 18 %.
3.3 load duration class class characterized by the effect of a constant load acting for a certain period of time in the life of the structure NOTE 1 For a variable action, the appropriate class is determined on the basis of an estimate of the interaction between the typical variation of the load with time and the rheological properties of the materials. NOTE 2 For strength and stiffness calculations, actions are assigned to one of the load-duration classes given in Table 1, derived from EN 1995-1-1. SIST EN 12369-2:2011

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 Medi
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