EN 16351:2021
(Main)Timber structures - Cross laminated timber - Requirements
Timber structures - Cross laminated timber - Requirements
This document sets out provisions regarding the performance of characteristics of the following Types of cross laminated timber for use in buildings and bridges:
- Type 1: Straight or curved cross laminated timber comprising only timber layers but no large finger joints;
- Type 2: Straight cross laminated timber comprising only timber layers and large finger joints;
- Type 3: Straight cross laminated timber comprising timber and wood-based panel layers but no large finger joints.
This document covers cross laminated timber of all three Types of cross laminated timber:
- manufactured according to this document, which sets up provisions for:
- boundary conditions during manufacture of cross laminated timber;
- moisture content and temperature of timber to be bonded;
- production of finger joints and bonds between layers;
- to be used in service class 1 or 2 according to EN 1995-1-1;
- made of coniferous species and poplar listed in this document;
- which may be made of layers made of different species;
- bonded with phenolic or aminoplastic or moisture curing one-component polyurethane or emulsion polymer isocyanate adhesives of adhesive Type I according to the respective standard;
- made of timber laminations having a nominal width between 40 mm (including) and 300 mm (including);
- built up of at least three orthogonally bonded layers (at least two of them timber layers);
- which may have, depending on the number of layers, adjacent layers bonded parallel to the grain;
- made of timber layers which are made of strength graded timber according to EN 14081-1;
-made of timber layers having nominal thicknesses between 6 mm (including) and 47 mm (including);
- made of timber layers which may comprise edge bonds;
- having nominal overall thicknesses up to 500 mm.
Additional provisions of this document apply for straight cross laminated timber comprising only timber layers and comprising large finger joints (Type 2):
- made from cross laminated timber pieces having the same cross-section and layup;
- made from cross laminated timber pieces having nominal cross-sectional thicknesses from 51 mm (including) up to 345 mm (including) and nominal minimum thicknesses of the outer layers not less than 17 mm (including);
- made from cross laminated timber pieces solely comprising timber layers;
- made from plane cross laminated timber pieces;
- with parallel x-axes of the jointed components;
- with large finger joints having a finger length of at least 45 mm and fingers which are visible at the two narrow sides of the components;
- having large finger joints bonded with phenolic or aminoplastic or moisture curing one-component polyurethane adhesives of adhesive Type I according to the respective standard.
Additional provisions of this document apply for straight cross laminated timber comprising timber and wood-based panel layers but no large finger joints (Type 3):
- made of structural wood-based panels specified in this document;
- made of one panel per layer and;
- having thicknesses between 6 mm (including) and 45 mm (including).
This document applies to cross laminated timber untreated or treated against biological attack.
This document does not cover:
- cross laminated timber treated with fire retardants;
- cross laminated timber which is produced from re-used timber or wood-based panels comprising re-used timber.
It also lays down procedures for assessment and verification of constancy of performance (AVPC) of cross laminated timber.
Holzbauwerke - Brettsperrholz - Anforderungen
In diesem Dokument werden die Bestimmungen hinsichtlich der Leistungsmerkmale der folgenden Arten von Brettsperrholz festgelegt, die in Gebäuden und Brücken verwendet werden:
— Typ 1: ebenes oder gekrümmtes Brettsperrholz, das nur Brettlagen, aber keine Universal-Keilzinken-verbindungen umfasst;
— Typ 2: ebenes Brettsperrholz, das nur Brettlagen und Universal-Keilzinkenverbindungen umfasst;
— Typ 3: ebenes Brettsperrholz, das Bretter und Holzwerkstofflagen, aber keine Universal-Keilzinken-verbindungen umfasst.
Dieses Dokument gilt für alle drei Arten von Brettsperrholz:
— das nach diesem Dokument hergestellt wurde, das folgende Bestimmungen festlegt:
— Randbedingungen bei der Herstellung von Brettsperrholz;
— Feuchtegehalt und Temperatur der zu verklebenden Bretter;
— Herstellung von Keilzinkenverbindungen und Klebverbindungen zwischen Lagen;
— das in der Nutzungsklasse 1 oder 2 nach EN 1995 1 1 angewendet wird;
— das aus Pappel oder Nadelholzarten besteht, die in diesem Dokument aufgeführt sind;
— das aus Lagen bestehen darf, die aus verschiedenen Holzarten hergestellt sind;
— das mit Phenoplast und Aminoplast-Klebstoffen oder einem feuchtigkeitsvernetzenden Einkomponenten-Klebstoff auf Polyurethanbasis oder Emulsion-Polymer-Isocyanat-Klebstoffen vom Typ I nach der jeweiligen Norm verklebt ist;
— das aus Brettlamellen mit Nennbreiten von 40 mm (einschließlich) bis 300 mm (einschließlich) besteht;
— das aus mindestens drei rechtwinklig zueinander verklebten Lagen (mindestens zwei Lagen sind Brettlagen) besteht;
— bei dem je nach Anzahl der Lagen aneinandergrenzende Lagen parallel zur Faser verklebt werden dürfen;
— das aus Lagen aus Vollholz (Bretter oder Bohlen, im Folgenden als Bretter bezeichnet) besteht, das entsprechend EN 14081 1 nach Festigkeit sortiert ist;
— das aus Brettlagen mit Nenndicken von 6 mm (einschließlich) bis 47 mm (einschließlich) besteht;
— das aus Brettlagen mit oder ohne Schmalseitenverklebung besteht;
— das Gesamt-Nenndicken von bis zu 500 mm hat.
Zusätzliche Bestimmungen dieses Dokuments gelten für ebenes Brettsperrholz, das nur Brettlagen und Universal-Keilzinkenverbindungen (Typ 2) enthält:
— das aus Brettsperrholzstücken mit gleichem Querschnitt und Aufbau besteht;
— das aus Brettsperrholzstücken mit Querschnitts-Nenndicken von 51 mm (einschließlich) bis 345 mm (einschließlich) besteht, wobei die Mindest-Nenndicken der äußeren Lagen mindestens 17 mm (einschließlich) betragen;
— das aus Brettsperrholzstücken besteht, die ausschließlich Brettlagen enthalten;
— das aus ebenen Brettsperrholzstücken besteht;
— mit parallelen x-Achsen der verbundenen Bauteile;
— das große Keilzinkenverbindungen mit einer Keilzinkenlänge von mindestens 45 mm enthält, wobei die Keilzinken an den beiden Schmalseiten der Komponenten sichtbar sind;
— das große Keilzinkenverbindungen enthält, die mit Phenoplast oder Aminoplast-Klebstoffen oder einem feuchtigkeitsvernetzenden Einkomponenten-Klebstoff auf Polyurethanbasis vom Typ I nach der jeweiligen Norm verklebt sind.
Zusätzliche Bestimmungen dieses Dokuments gelten für ebenes Brettsperrholz, das Bretter und Holzwerk-stofflagen, aber keine Universal‑Keilzinkenverbindungen (Typ 3) enthält:
— das aus den in diesem Dokument festgelegten Holzwerkstoffen für tragende Zwecke besteht;
— das aus einer Platte je Lage besteht und;
— mit Dicken zwischen 6 mm (einschließlich) und 45 mm (einschließlich).
Dieses Dokument gilt für Brettsperrholz, das unbehandelt ist oder gegen biologischen Befall behandelt wurde.
Dieses Dokument gilt nicht für:
— mit Feuerschutzmittel behandeltes Brettsperrholz;
— Brettsperrholz, das aus Altholz oder aus Holzwerkstoffen besteht, die Altholz enthalten.
Darüber hinaus legt die Norm auch Verfahren zur Bewertung und Überprüfung der Leistungsbeständigkeit (AVCP) von Brettsperrholz fest.
Structures en bois - Bois lamellé croisé - Exigences
Le présent document établit les dispositions relatives à la performance des caractéristiques pour les types suivants de bois lamellé croisé, destinés à être utilisés dans les bâtiments et les ponts :
- Type 1 : bois lamellé croisé, droit ou courbe, constitué uniquement de couches de bois et sans aboutage à entures multiples de grandes dimensions ;
- Type 2 : bois lamellé croisé droit, constitué uniquement de couches de bois et comprenant des aboutages à entures multiples de grandes dimensions ;
- Type 3 : bois lamellé croisé droit, constitué de couches de bois et de couches en panneaux à base de bois, sans aboutage à entures multiples de grandes dimensions.
Le présent document couvre le bois lamellé croisé appartenant à l'ensemble des trois types de bois lamellé croisé :
- fabriqué conformément au présent document, qui établit les dispositions pour :
- les conditions limites pendant la fabrication du bois lamellé croisé ;
- la teneur en humidité et la température du bois à coller ;
- la production des aboutages à entures multiples et du collage entre les couches ;
- destiné à être utilisé en classe de service 1 ou 2 conformément à l'EN 1995-1-1 ;
- constitué des essences de bois de résineux et de peuplier énumérées dans le présent document ;
- qui peut être constitué de couches composées de différentes essences ;
- collé avec des adhésifs de nature phénolique ou aminoplaste ou des adhésifs polyuréthane monocomposants durcissant à l'humidité ou des adhésifs à base d'isocyanate et de polymère en émulsion de Type I conformément à la norme correspondante ;
- constitué de lamelles de bois avec une largeur nominale comprise entre 40 mm (inclus) et 300 mm (inclus) ;
- constitué d'au moins trois couches collées orthogonalement (au moins deux d'entre elles étant des couches de bois) ;
- pouvant comporter, en fonction du nombre de couches, des couches contigües collées parallèlement au fil ;
- comportant des couches de bois constituées de bois classé pour sa résistance conformément à l'EN 14081-1 ;
- constitué de couches de bois avec une épaisseur nominale comprise entre 6 mm (inclus) et 47 mm (inclus) ;
- constitué de couches de bois pouvant comporter des collages sur chant ;
- ayant des épaisseurs totales nominales inférieures ou égales à 500 mm.
[...]
Lesene konstrukcije - Križno lamelirani les - Zahteve
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-julij-2021
Nadomešča:
SIST EN 16351:2015
Lesene konstrukcije - Križno lamelirani les - Zahteve
Timber structures - Cross laminated timber - Requirements
Holzbauwerke - Brettsperrholz - Anforderungen
Structures en bois - Bois lamellé croisé - Exigences
Ta slovenski standard je istoveten z: EN 16351:2021
ICS:
79.060.10 Vezan les Plywood
91.080.20 Lesene konstrukcije Timber structures
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN 16351
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2021
EUROPÄISCHE NORM
ICS 79.060.10 Supersedes EN 16351:2015
English Version
Timber structures - Cross laminated timber -
Requirements
Structures en bois - Bois lamellé croisé - Exigences Holzbauwerke - Brettsperrholz - Anforderungen
This European Standard was approved by CEN on 4 January 2021.
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, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 16351:2021 E
worldwide for CEN national Members.
Contents Page
European foreword . 4
Introduction . 5
1 Scope . 7
2 Normative references . 8
3 Terms, definitions and symbols .10
3.1 Terms and definitions .10
3.2 Symbols .16
3.2.1 Main symbols .16
3.2.2 Subscripts .17
4 Characteristics .19
4.1 Modulus of elasticity, bending strength, compressive strength, tensile strength and
shear strength .19
4.1.1 General .19
4.1.2 Geometrical data of cross laminated timber .21
4.1.3 Strength, stiffness and density properties of layers .22
4.1.4 Bending strength of large finger joints .24
4.1.5 Rolling shear strength, compression strength perpendicular to grain and density of
cross laminated timber .24
4.2 Bonding strength .25
4.2.1 General .25
4.2.2 Bonding strength of glue lines between layers .25
4.2.3 Bonding strength of structural edge bonds .26
4.2.4 Bonding strength of large finger joints .26
4.3 Resistance to fire .26
4.4 Reaction to fire .27
4.4.1 General .27
4.4.2 Classification without further testing .27
4.4.3 Classification based on testing .29
4.5 Dimensional stability .30
4.6 Emission of formaldehyde .30
4.7 Durability .31
4.7.1 Durability of bonding strength .31
4.7.2 Durability of other characteristics .32
5 Assessment and Verification of Constancy of Performance (AVCP) .33
5.1 General .33
5.2 Type testing .33
5.2.1 General .33
5.2.2 Test samples, testing and compliance criteria .34
5.2.3 Test reports .41
5.3 Factory production control (FPC) .41
5.3.1 General .41
5.3.2 Provisions .41
5.3.3 Initial inspection of factory and of FPC .51
5.3.4 Continuous surveillance of FPC .51
5.3.5 Procedure for modifications .51
Annex A (normative) Delamination test of glue lines between layers . 52
Annex B (normative) Tests with laminations with or without finger joints . 56
Annex C (normative) Determination of strength, stiffness and density characteristics of
cross laminated timber . 59
Annex D (normative) Measurement of moisture content . 76
Annex E (normative) Adhesive application for finger joints in laminations. 77
Annex F (normative) Minimum production provisions . 78
Annex G (normative) Shear tests. 92
Annex H (normative) Additional test methods and requirements for adhesives of subclass
FJ for use in structural edge bonds . 95
Bibliography . 96
European foreword
This document (EN 16351:2021) has been prepared by Technical Committee CEN/TC 124 “Timber
structures”, the secretariat of which is held by AFNOR.
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 September 2021, and conflicting national standards shall
be withdrawn at the latest by December 2022.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 16351:2015.
The following changes have been made:
— the standard has been adjusted to the latest versions of standards for adhesives;
— the provisions for reaction and resistance to fire have been modified;
— the provisions for gap widths and ratios of lamination width by thickness have been modified;
— missing provisions for factory production control have been added;
— the provisions for determination of strength, stiffness and density characteristics of cross laminated
timber have been modified;
— the standard has been adjusted to the latest templates;
— Annex ZA has been deleted.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: 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, Republic of North
Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United
Kingdom.
Introduction
Figure 1 shows the relation of some European Standards on structural timber products.
Key
1 boards 6 glued laminated timber (glulam)
2 is a component for 7 glulam with large finger joints
3 structural finger jointed timber 8 block glued glulam
4 glued laminated products 9 cross laminated timber
5 glued solid timber 10 cross laminated timber with large finger joints
Figure 1 — Relation of some European Standards on structural timber products
Cross laminated timber in accordance with this document and multilayer solid wood panels in
accordance with EN 13353 may have the same layup, but for cross laminated timber the timber is
strength graded according to EN 14081-1 and the adhesives are tested according to the provisions of this
document.
The following standards mentioned in Clause 2, EN 13986, EN 14080, EN 14081-1, EN 14374 and
EN 15497, are harmonized product standards. The applicable version cited in the Official Journal of the
EU are not necessarily the latest published by CEN.
1 Scope
This document sets out provisions regarding the performance of characteristics of the following Types of
cross laminated timber for use in buildings and bridges:
— Type 1: Straight or curved cross laminated timber comprising only timber layers but no large finger
joints;
— Type 2: Straight cross laminated timber comprising only timber layers and large finger joints;
— Type 3: Straight cross laminated timber comprising timber and wood-based panel layers but no large
finger joints.
This document covers cross laminated timber of all three Types of cross laminated timber:
— manufactured according to this document, which sets up provisions for:
— boundary conditions during manufacture of cross laminated timber;
— moisture content and temperature of timber to be bonded;
— production of finger joints and bonds between layers;
— to be used in service class 1 or 2 according to EN 1995-1-1;
— made of coniferous species and poplar listed in this document;
— which may be made of layer
...
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