SIST EN 408:2010/kFprA1:2012

Timber structures - Structural timber and glued laminated timber - Determination of some physical and mechanical properties.

This European Standard specifies test methods for determining the following properties of structural timber and glued laminated timber: modulus of elasticity in bending; shear modulus; bending strength, modulus of elasticity in tension and tension strength parallel to the grain; modulus of elasticity in compression and compression strength parallel to the grain; modulus of elasticity in tension and tension strength perpendicular to the grain; modulus of elasticity in compression and compression strength perpendicular to the grain; and shear strength.

Holzbauwerke - Bauholz für tragende Zwecke und Brettschichtholz - Bestimmung einiger physikalischer und mechanischer Eigenschaften

Structures en bois - Bois de structure et bois lamellé-collé - Détermination de certaines propriétés physiques et mécaniques

Lesene konstrukcije - Konstrukcijski les in lepljeni lamelirani les - Ugotavljanje nekaterih fizikalnih in mehanskih lastnosti

General Information

• Status: Not Published
• Public Enquiry End Date: 28-Feb-2012
• ICS: 79.040 - Wood, sawlogs and sawn timber
• ICS: 91.080.20 - Timber structures
• Technical Committee: KON.005 - Timber structures
• Current Stage: 98 - Abandoned project (Adopted Project)
• Start Date: 11-Jun-2014
• Due Date: 16-Jun-2014
• Completion Date: 11-Jun-2014
• Ref Project: EN 408:2010/FprA1 - Timber structures - Structural timber and glued laminated timber - Determination of some physical and mechanical properties.

Relations

• Consolidated By: SIST EN 408:2010+A1:2012 - Timber structures - Structural timber and glued laminated timber - Determination of some physical and mechanical properties
• Effective Date: 30-May-2012

Overview

EN 408:2010/FprA1 is a CEN European standard (draft amendment A1 to EN 408:2010) that defines standardized laboratory test methods for determining key physical and mechanical properties of structural timber and glued laminated timber (glulam). Prepared by Technical Committee CEN/TC 124, the document is used to generate reproducible data for design, quality control, classification and certification of timber products used in load-bearing timber structures.

Key topics and technical requirements

The standard specifies methods to determine the following properties:

• Modulus of elasticity in bending and associated bending behaviour
• Shear modulus (G) and shear strength
• Bending strength (f m)
• Modulus of elasticity and strength in tension parallel to the grain
• Modulus of elasticity and strength in compression parallel to the grain
• Modulus of elasticity and strength in tension and compression perpendicular to the grain

Notable technical clarifications and amendments in FprA1:

• EN 384:2010 (determination of characteristic values and density) is referenced and integrated for strength-class allocation.
• Guidance on shear influence: the shear modulus G may be determined by the methods in the standard or taken as infinite when using EN 384 strength-class procedures; a typical mean shear modulus for coniferous species is indicated (reported in the amendment).
• Requirements for testing finger-jointed timber were updated: minimum specimen spans changed (e.g., from 12 to 19 times section depth in one clause; another span changed to 18 times depth) and the loading-head movement is prescribed so Fmax is reached within (300 ± 120) s.

Applications and users

Who uses EN 408:2010/FprA1:

• Test laboratories performing mechanical and physical testing on sawn timber and glulam
• Manufacturers and quality control teams for structural timber and glued laminated products
• Structural engineers and designers requiring validated material properties for calculations and safety checks
• Certification bodies and conformity assessment authorities for product classification to EN 384 strength classes
• Research organisations studying timber mechanics and new engineered wood products

Practical uses:

• Generating design values (E, G, strengths) for structural calculation and modelling
• Supporting product acceptance, production control and batch testing of glulam and sawn timber
• Providing data for strength class allocation and compliance with European timber construction rules

Related standards

• EN 384:2010 - Structural timber - Determination of characteristic values of mechanical properties and density (referenced in the amendment)
• Other CEN standards on timber testing and classification (see CEN/TC 124 publications)

Keywords: EN 408:2010/FprA1, timber structures, structural timber, glued laminated timber, modulus of elasticity, shear modulus, bending strength, EN 384, CEN.

Standards Content (Sample)

SLOVENSKI STANDARD
01-februar-2012
Lesene konstrukcije - Konstrukcijski les in lepljeni lamelirani les - Ugotavljanje
nekaterih fizikalnih in mehanskih lastnosti
Timber structures - Structural timber and glued laminated timber - Determination of some
physical and mechanical properties.
Holzbauwerke - Bauholz für tragende Zwecke und Brettschichtholz - Bestimmung einiger
physikalischer und mechanischer Eigenschaften
Structures en bois - Bois de structure et bois lamellé-collé - Détermination de certaines
propriétés physiques et mécaniques
Ta slovenski standard je istoveten z: EN 408:2010/FprA1
ICS:
79.040 Les, hlodovina in žagan les Wood, sawlogs and sawn
timber
91.080.20 Lesene konstrukcije Timber structures
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
FINAL DRAFT
EN 408:2010
NORME EUROPÉENNE
EUROPÄISCHE NORM
FprA1
December 2011
ICS 79.040; 79.060.99; 91.080.20
English Version
Timber structures - Structural timber and glued laminated timber
- Determination of some physical and mechanical properties.
Structures en bois - Bois de structure et bois lamellé-collé - Holzbauwerke - Bauholz für tragende Zwecke und
Détermination de certaines propriétés physiques et Brettschichtholz - Bestimmung einiger physikalischer und
mécaniques mechanischer Eigenschaften
This draft amendment is submitted to CEN members for unique acceptance procedure. It has been drawn up by the Technical Committee
CEN/TC 124.
This draft amendment A1, if approved, will modify the European Standard EN 408:2010. If this draft becomes an amendment, CEN
members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for inclusion of this amendment
into the relevant national standard without any alteration.

This draft amendment was established by CEN 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.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2011 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 408:2010/FprA1:2011: E
worldwide for CEN national Members.

EN 408:2011/FprA1:2011 (E)
Contents Page
Foreword .3
1 Modification to 2 .4
2 Modification to 10.3 .
...