EN 14374:2004

Timber structures - Structural laminated veneer lumber - Requirements

This document specifies the requirements for laminated veneer lumber for structural applications. The tests to be used, methods to carry out the evaluation of conformity and content of the marking of the product are given.
This document does not cover laminated veneer lumber treated against biological attack or fire.

Holzbauwerke - Furnierschichtholz für tragende Zwecke - Anforderungen

Diese Europäische Norm legt die Anforderungen an Furnierschichtholz für tragende Zwecke fest. Die anzuwendenden Prüfverfahren, die Verfahren zur Bewertung der Konformität sowie die Kennzeichnung des Produktes sind angegeben.
Furnierschichtholz, das zum Schutz gegen biologischen Befall oder Feuer behandelt wurde, ist nicht Gegenstand dieser Europäischen Norm.

Structures en bois - LVL (Lamibois) - Exigences

Le présent document spécifie les exigences relatives au lamibois pour application en structure. Les essais à effectuer, les méthodes à utiliser pour évaluer la conformité et le contenu du marquage à appliquer sur le produit sont indiqués.
La présente Norme européenne ne traite pas du lamibois traité contre les attaques biologiques ou le feu.

Lesene konstrukcije – Furnirni slojnat les (LVL) za konstrukcije – Zahteve

General Information

• Status: Published
• Publication Date: 23-Nov-2004
• Withdrawal Date: 30-Aug-2006
• ICS: 79.080 - Semi-manufactures of timber
• ICS: 91.080.20 - Timber structures
• Technical Committee: CEN/TC 124 - Timber structures
• Drafting Committee: CEN/TC 124/WG 3 - Glued laminated timber
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 24-Nov-2004
• Completion Date: 24-Nov-2004
• Directive: 305/2011 - Regulation (eu) No 305/2011 of the European Parliament and of the Council of 9 march 2011 laying down harmonised conditions for the marketing of construction products and repealing council directive 89/106/eec
• Directive: 89/106/EEC - Construction products
• Mandate: M/112 - Mandate to CEN/CENELEC concerning the execution of standardization work for harmonized standards on structural timber products
• Ref Project: SIST EN 14374:2005 - Timber structures - Structural laminated veneer lumber - Requirements

Relations

• Revised: FprEN 14374 - Timber structures - Laminated veneer lumber (LVL) - Requirements
• Effective Date: 18-Jan-2023

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Timber structures - Structural laminated veneer lumber - RequirementsLesene konstrukcije – Furnirni slojnat les (LVL) za konstrukcije – ZahteveStructures en bois - LVL (Lamibois) - ExigencesHolzbauwerke - Furnierschichtholz für tragende Zwecke - AnforderungenTa slovenski standard je istoveten z:EN 14374:2004SIST EN 14374:2005en91.080.2079.080ICS:SLOVENSKI
STANDARDSIST EN 14374:200501-maj-2005

EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 14374November 2004ICS 91.080.20; 79.080English versionTimber structures - Structural laminated veneer lumber -RequirementsStructures en bois - LVL (Lamibois) - ExigencesHolzbauwerke - Furnierschichtholz für tragende Zwecke -AnforderungenThis European Standard was approved by CEN on 22 July 2004.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, 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© 2004 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14374:2004: E

(EN 14374:2004) has been prepared by Technical Committee CEN/TC 124 "Timber Structures", the secretariat of which is held by SFS. 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 May 2005, and conflicting national standards shall be withdrawn at the latest by May 2005. No existing European Standards are superseded. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s). For relationship with EU Directive(s), see informative annex ZA, which is an integral part of this document. 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, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

1 Scope This document specifies the requirements for laminated veneer lumber for structural applications. The tests to be used, methods to carry out the evaluation of conformity and content of the marking of the product are given. This document does not cover laminated veneer lumber treated against biological attack or fire. 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 314-1, Plywood – Bonding quality – Part 1: Test methods. EN 322, Wood-based panels – Determination of moisture content. EN 323, Wood-based panels – Determination of density. EN 350-2, Durability of wood and wood-based products – Natural durability of solid wood – Part 2: Guide to natural durability and treatability of selected wood species of importance in Europe. EN 408, Timber structures – Structural timber and glued laminated timber – Determination of some physical and mechanical properties. ENV 717-1, Wood-based panels – Determination of 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 1438:1998, Symbols for timber and wood-based products. EN 13501-1, Fire classification of construction products and building elements – Part 1: Classification using test data from reaction to fire tests. prEN 14358, Structural timber – Calculation of characteristic 5-percentile value.

(10 ± 2) %
a)b)tbtb Figure 1 – Thickness t and width b of cross section of laminated veneer lumber. Case a) is the cross section related to edgewise bending while case b) is the cross section related to flatwise bending 4 Requirements 4.1 Veneers The minimum number of veneers in the cross section shall be five. The maximum thickness of each veneer shall be 6 mm. 4.2 Bonding quality The bonding quality shall be determined in accordance with the method given in annex B. For each tested glueline the apparent cohesive wood failure percentage shall be at least 70 %.

α Figure 2 – Example of an angle αααα of a cross section of laminated veneer lumber 4.4 Strength 4.4.1 General The manufacturer of laminated veneer lumber shall declare fifth percentile characteristic strength values. NOTE The orientation of strength is given in annex A. The characteristic values shall be determined from tests given in 4.4.2 to 4.4.9 and evaluated in accordance w
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