FprEN 14374
(Main)Timber structures - Laminated veneer lumber (LVL) - Requirements
Timber structures - Laminated veneer lumber (LVL) - Requirements
This document sets out requirements regarding the performance of characteristics of the following Types of laminated veneer lumber (LVL):
- Type 1: LVL for structural applications in buildings and bridges in dry, humid and exterior conditions;
- Type 2: Multiple glued LVL for structural applications in buildings and bridges in dry, humid and exterior conditions;
- Type 3: LVL for non-structural internal and external applications in construction.
This document covers laminated veneer lumber of all Types:
- made of at least five veneers having a maximum veneer thickness of 6 mm;
- which may comprise veneers made from different species;
- solely made of parallel veneers or symmetrically build up with at least two crossband veneers.
This document also covers multiple glued LVL (Type 2) which is produced by face gluing several panels according to this standard.
This document covers laminated veneer lumber of any Type being either preservative treated or untreated against biological attack or treated to improve the reaction to fire performance.
This document also lays down procedures for assessment and verification of constancy of performance (AVCP) and specifies marking and labelling of laminated veneer lumber.
This document does not cover laminated veneer lumber which is produced from re-used timber.
Holzbauwerke - Furnierschichtholz (LVL) - Anforderungen
Diese Europäische Norm legt Bestimmungen bezüglich der Leistungsmerkmale von Furnierschichtholz für tragende Zwecke (LVL), zur Verwendung in Gebäuden und Brücken, und von Furnierschichtholz für nicht tragende Zwecke, für Innen- und Außenanwendungen im Bau, fest.
Sie legt ebenfalls Verfahren fest, für Bewertung und Überprüfung der Leistungsbeständigkeit von Furnierschichtholz.
Diese Europäische Norm deckt Furnierschichtholz ab,
- das aus mindestens fünf Furnieren, mit einer maximalen Furnierdicke von 6 mm, hergestellt ist;
- welches Absperrfurniere enthalten kann;
- welches Furniere aus unterschiedlichen Holzarten enthalten kann;
- der gegen biologischen Befall mit Holzschutzmittel behandelt oder unbehandelt oder zur Verbesserung des Brandverhaltens behandelt ist.
Diese Europäische Norm legt Bestimmungen für Haftfestigkeit und Beständigkeit von Haftfestigkeit, unter trockenen, feuchten und Außenbedingungen, fest. Sie deckt LVL für tragende Zwecke, zur Verwendung unter allen Bedingungen und LVL für nicht tragende Zwecke, zur Verwendung unter den jeweiligen Bedingungen, für die Haftfestigkeitsprüfungen ausgeführt wurden, ab.
Diese Europäische Norm legt Festigkeitsklassen für Furnierschichtholz für tragende Zwecke fest.
Structures en bois - Lamibois (LVL) - Exigences
Le présent document définit les exigences relatives aux caractéristiques de performance des types suivants de lamibois (LVL) :
- type 1 : LVL pour les applications structurelles dans les immeubles et ponts en milieu sec, humide et extérieur ;
- type 2 : LVL contrecollé pour les applications structurelles dans les immeubles et ponts en milieu sec, humide et extérieur ;
- type 3 : LVL non structurel dans des applications de construction intérieures et extérieures.
Le présent document traite du lamibois de tous types :
- constitué d’au moins cinq plis et présentant une épaisseur de pli maximale de 6 mm ;
- pouvant comprendre des plis d’essences différentes ;
- fait uniquement de plis parallèles ou placés symétriquement avec au moins deux plis croisés.
Le présent document traite également du LVL contrecollé (Type 2) qui est produit par collage des faces de plusieurs panneaux conformément à la présente norme.
Le présent document traite du lamibois de tout type qu’il ait ou non subi un traitement de préservation contre les attaques biologiques ou qu’il soit traité pour améliorer la performance de réaction au feu.
Le présent document établit également des modes opératoires d’évaluation et de vérification de la constance des performances (EVCP) et spécifie le marquage et l’étiquetage du lamibois.
Le présent document ne traite pas du lamibois qui est produit à partir de bois recyclé.
Lesene konstrukcije - Slojnat furnirni les (LVL) - Zahteve
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
oSIST prEN 14374:2016
01-julij-2016
Lesene konstrukcije - Slojnat furnirni les (LVL) - Zahteve
Timber structures - Laminated veneer lumber (LVL) - Requirements
Holzbauwerke - Furnierschichtholz (LVL) - Anforderungen
Structures en bois - Lamibois (LVL) - Exigences
Ta slovenski standard je istoveten z: prEN 14374
ICS:
79.080 Polizdelki iz lesa Semi-manufactures of timber
91.080.20 Lesene konstrukcije Timber structures
oSIST prEN 14374:2016 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
oSIST prEN 14374:2016
oSIST prEN 14374:2016
DRAFT
EUROPEAN STANDARD
prEN 14374
NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2016
ICS 79.080; 91.080.20 Will supersede EN 14279:2004+A1:2009,
EN 14374:2004
English Version
Timber structures - Laminated veneer lumber (LVL) -
Requirements
Structures en bois - Lamibois (LVL) - Exigences Holzbauwerke - Furnierschichtholz (LVL) -
Anforderungen
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 124.
If this draft becomes a European Standard, 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.
This draft European Standard 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey 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 NORMALISATIO N
EUROPÄISCHES KOMITEE FÜR NORMUN G
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2016 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 14374:2016 E
worldwide for CEN national Members.
oSIST prEN 14374:2016
prEN 14374:2016 (E)
Contents Page
European foreword . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 8
4 Symbols . 10
4.1 Main symbols . 10
4.2 Subscripts . 11
5 Classification. 11
6 Material characteristics and testing, assessment and sampling methods . 12
6.1 Modulus of elasticity, bending, compressive, tensile and shear strength of structural
LVL . 12
6.2 Strength and stiffness under point load of structural LVL (punching shear) . 12
6.3 Racking resistance of structural LVL . 12
6.4 Impact resistance of structural LVL . 13
6.5 Embedment strength of fasteners in structural LVL . 13
6.6 Mechanical durability (i.e. duration of load and creep) of structural LVL . 13
6.7 Bonding strength and durability of bonding strength (also covering moisture
resistance) of structural and non-structural LVL . 13
6.8 Dimensional stability of structural and non-structural LVL (also covering durability-
swelling in thickness) . 14
6.9 Durability of other characteristics against biological attack of structural and non-
structural LVL . 15
6.10 Resistance to fire of structural LVL . 16
6.11 Reaction to fire of structural and non-structural LVL . 16
6.12 Fire protection ability . 19
6.13 Release of formaldehyde of structural and non-structural LVL . 19
6.14 Release/content of other dangerous substances (also covering release/content of
pentachlorphenol (PCP)) of structural and non-structural LVL . 20
6.15 Water vapour permeability of structural and non-structural LVL . 20
6.16 Airborne sound insulation (surface mass) of structural and non-structural LVL . 20
6.17 Sound adsorption of structural and non-structural LVL . 21
6.18 Thermal conductivity of structural and non-structural LVL . 21
6.19 Air permeability of structural and non-structural LVL . 21
6.20 Supplementary properties of structural and non-structural LVL . 21
7 Assessment and Verification of Constancy of Performance (AVCP) . 21
7.1 General. 21
7.2 Type testing . 22
7.3 Factory production control (FPC) . 30
8 Marking and labelling . 42
Annex A (normative) Testing of strength, stiffness and density properties of laminated
veneer lumber . 43
A.1 General. 43
oSIST prEN 14374:2016
prEN 14374:2016
A.2 Edgewise bending strength and edgewise modulus of elasticity in bending parallel to
the grain of the face veneers . 45
A.3 Edgewise bending strength, edgewise modulus of elasticity and edgewise shear
strength in bending perpendicular to the grain of the face veneers . 45
A.4 Flatwise bending strength and flatwise modulus of elasticity in bending parallel to
the grain of the face veneers . 46
A.5 Flatwise bending strength and flatwise modulus of elasticity in bending
perpendicular to the grain of the face veneers . 46
A.6 Tension strength and modulus of elasticity in tension parallel to the grain of the face
veneers . 46
A.7 Edgewise tension strength in plane of the veneers and perpendicular to the grain of
the face veneers . 46
A.8 Compression strength and modulus of elasticity in compression parallel to the grain
of the face veneers . 47
A.9 Edgewise compression strength and edgewise modulus of elasticity in compression
in plane of the veneers and perpendicular to the grain of the face veneers . 47
A.10 Flatwise compression strength and flatwise modulus of elasticity perpendicular to
the plane of the veneers . 47
A.11 Edgewise shear strength and edgewise shear modulus parallel to the grain of the
face veneers . 47
A.12 Flatwise shear strength and flatwise shear modulus parallel to the grain of the face
veneers . 47
A.13 Flatwise shear strength and flatwise shear modulus perpendicular to the grain of
the face veneers . 48
A.14 Density . 48
A.15 Moisture content . 48
Annex B (normative) Strength classes for structural laminated veneer lumber . 49
B.1 General . 49
B.2 LVL without cross-band veneers . 49
B.3 LVL with crossband veneers . 51
Annex C (normative) Layup factors for laminated veneer lumber with cross-band veneers . 53
C.1 General . 53
C.2 Determination of layup factors for LVL made from one species. 54
C.3 Layup factors for LVL made of different species. 55
Annex D (normative) Testing of bonding quality for structural LVL . 56
D.1 Specimens . 56
D.2 Tests . 56
D.3 Report . 56
Annex E (normative) Testing of bonding strength for non-structural LVL . 57
E.1 General . 57
oSIST prEN 14374:2016
prEN 14374:2016 (E)
E.2 Test pieces . 57
E.3 Apparatus . 64
E.4 Procedure . 64
E.5 Evaluation of test results . 64
Annex F (normative) Release of formaldehyde .
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.