prEN 15497
(Main)Finger jointed structural timber - Performance requirements and minimum production requirements
Finger jointed structural timber - Performance requirements and minimum production requirements
This European standard specifies performance and production requirements for finger jointed structural timber with rectangular cross-section. This standard covers also test and/or calculation methods to carry out the evaluation of conformity and requirements for marking of these finger joints.
This standard is only applicable to finger joints between timber members of the same species or species combination.
The standard covers not only coniferous species but also broad-leaved species where it has been shown that the type of adhesive used and the assembly conditions for finger-jointing timber are suitable for that type of species.
This standard covers finger-jointed structural timber untreated or treated against biological attack after finger-jointing.
This standard does not cover impressed (die formed) finger joints.
Individual finger jointed laminations and large finger joints for glued laminated timber are not covered by the present standard.
Structural timber treated against fire is not covered by this standard.
Keilgezinktes Bauholz - Leistungsanforderungen und Mindestanforderungen an die Herstellung
Diese Norm enthält Leistungs- und Herstellungsanforderungen an Bauholz für tragende Zwecke mit recht-eckigem Querschnitt und geklebten Keilzinkenverbindungen.
Diese Norm gilt nur für Keilzinkenverbindungen in Holzbauteilen derselben Holzart oder Holzartenkombination.
Diese Norm umfasst Nadelholzarten sowie Laubholzarten, sofern Angaben vorliegen, die eine zufrieden stellende Klebung dieser Holzarten ergeben.
Bauholz für tragende Zwecke, das zum Schutz gegen den biologischen Befall behandelt wurde, ist ebenfalls Gegenstand dieser Norm.
Verbindungen, die mit Pressverformung („die-formed“) hergestellt werden, sind in dieser Norm nicht berück-sichtigt.
Einzellamellen in Brettschichtholz und Universal-Keilzinkenverbindungen in Brettschichtholz werden in dieser Norm nicht behandelt.
Bauholz für tragende Zwecke, das zum Schutz gegen Feuer behandelt wurde, ist nicht Gegenstand dieser Norm.
Aboutages à entures multiples dans les bois de construction - Exigences de performance et exigences minimales de fabrication
La présente norme prescrit les performances et les exigences de production relatives au bois de structure à section rectangulaire avec aboutages à entures multiples. La présente norme couvre également les méthodes d’essais et/ou de calcul permettant l ‘évaluation de la conformité ansiainsi que les exigences pour le marquage de ces aboutages.
La présente norme s’applique uniquement aux aboutages à entures multiples entre éléments en bois de même type d’essence ou de combinaison d’essences.
La présente norme ne s’applique pas qu’aux essences résineuses mais aussi aux essences feuillues lorsqu’il a été démontré que le type d’adhésif utilisé et les conditions d’assemblage pour le bois abouté conviennent à ce type d’essences.
La présente norme s’applique aux bois de structure avec aboutages à entures multiples non traité ou traité contre les attaques biologiques après l’aboutage.
Cette norme ne traite pas des aboutages emboutis.
Les lamelles individuelles aboutées et les aboutages à entures multiples de grandes dimensions pour du bois lamellé collé ne sont pas couvertes par la présente norme.
Le bois de structure traité contre le feu n’est pas couvert par la présente norme.
Konstrukcijski les z zobatimi stiki - Zahteve za uporabo in minimalne zahteve za proizvodnjo
General Information
Standards Content (Sample)
SLOVENSKI oSIST prEN 15497:2006
PREDSTANDARD
may 2006
Konstrukcijski les z zobatimi stiki - Zahteve za uporabo in minimalne zahteve
za proizvodnjo
Finger jointed structural timber - Performance requirements and minimum
production requirements
ICS 79.040 Referenčna številka
© Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno
EUROPEAN STANDARD
DRAFT
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2006
ICS
English Version
Finger jointed structural timber - Performance requirements and
minimum production requirements
Aboutages à entures multiples dans les bois de
construction - Exigences de performance et exigences
minimales de fabrication
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 Management Centre has the same
status as the official versions.
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, 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: rue de Stassart, 36 B-1050 Brussels
© 2006 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 15497:2006: E
worldwide for CEN national Members.
Contents
Foreword .5
Introduction.6
1 Scope.6
2 Normative references.6
3 Terms and definitions .7
4 Symbols and abbreviations.8
5 Requirements.8
5.1 General .8
5.2 Timber.9
5.2.1 Strength .9
5.2.2 Species .9
5.2.3 Knots and fissures.9
5.2.4 Wane or edge damage.9
5.3 Adhesives .10
5.4 Strength and stiffness.11
5.4.1 Timber.11
5.4.2 Finger joints .11
5.4.3 Testing of finger joints .11
5.5 Natural durability.11
5.6 Reaction to fire.11
6 Evaluation of conformity .11
6.1 General .11
6.2 Type testing .11
6.2.1 Initial type testing.11
6.2.2 Further type testing.12
6.2.3 Type testing of the timber .12
6.2.4 Type testing of the finger joints.12
6.3 Factory production control (FPC) .13
6.3.1 General .13
6.3.2 Equipment.13
6.3.3 Raw materials and components .13
6.3.4 Product testing and evaluation .13
7 Marking.14
Annex A (normative) Manufacturing requirements.15
A.1 Production conditions.15
A.2 Timber .15
A.3 Adhesive application .15
A.3.1 Adhesive application by machine.15
A.3.2 Manual adhesive application.15
A.4 Assembly and end pressure.15
A.4.1 Assembly.15
A.4.2 Adhesive.16
A.4.2 End pressure.16
ZA.1 Scope and relevant characteristics.17
ZA2 Procedure for attestation of conformity of structural finger jointed timber.18
ZA.2.1 System of attestation of conformity.18
ZA.3 CE marking and labelling.19
Foreword
This document (prEN 15497:2006) has been prepared by Technical Committee CEN/TC 124 "Timber
structures", the secretariat of which is held by SFS.
This document is currently submitted to the CEN Enquiry.
This document will not replace any existing standard.
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.
Introduction
1 Scope
This standard specifies requirements for structural timber with rectangular cross-section with bonded finger
joints and minimum requirements for the manufacture of cut, interlocking, bonded finger joints in structural
timber members.
This standard is only applicable to finger joints between timber members of the same species type.
The standard covers coniferous species as well as broad-leaved species where information is available to
enable them to be satisfactorily bonded.
This standard does not cover impressed (die-formed) joints.
Individual laminations for glued laminated timber are covered by EN 385.
Large finger joints in glued laminated timber members are covered by EN 387.
Structural timber treated against biological attack or fire is not covered in this standard.
2 Normative references
This European Standard incorporates by dated or undated reference, provisions from other publications.
These normative references are cited at the appropriate places in the text and the publications are listed
hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply
to this European Standard only when incorporated in it by amendment or revision. For undated references
the latest edition of the publication referred to applies (including amendments).
EN 301 Adhesives, phenolic and aminoplastic for load-bearing timber
structures - Classification and performance requirements
EN 350-1 Durability of wood and wood-based products – Natural durability of
solid wood – Part 1: Guide to the principles of testing and
classification of the natural durability of wood
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 384 Structural timber – Determination of characteristic values of
mechanical properties and densities
EN 408 Timber structures - Structural timber and glued laminated timber -
Determination of some physical and mechanical properties
EN 13501-1 Fire classification of construction products and building elements –
Part 1: Classification using test data from reaction to fire tests
prEN 14081-1 Timber structures – Strength graded structural timber with
rectangular cross section – Part 1: General requirements
EN 14358 Structural timber – Calculation of characteristic 5-percentile values
EN/ISO 9001 Quality management systems - requirements
3 Terms and definitions
For the purposes of this standard, the following definitions apply:
3.1
characteristic strength:
population 5-percentile value obtained from the results of tests with a duration of 300 s using test pieces at an
o
equilibrium moisture content resulting from a temperature of 20 C and a relative humidity of 65 %.
3.2
finger joint:
self-locating end joint formed by machining a number of similar, tapered, symmetrical fingers in the ends of
timber members, which are then bonded together. See figure 1.
Figure 1: Typical profile of finger joint showing finger length l, pitch p, tip width b ,
t
and tip gap l , 1) grain direction
t
3.2
finger length:
distance between the finger base and the tip of the finger, measured along the centre line of the finger.
3.3
grade:
strength grade or strength class.
3.4
pitch:
distance between fingers, centre to centre.
3.5
producer:
legal entity responsible for finger jointing the timber.
3.6
production batch:
joints, all of which have the same profile, manufactured from the same species of timber, the same strength
class, having the same nominal cross section, bonded with the same adhesive and made during a continuous
run on one production line.
3.7
service class 1:
service class characterized by a moisture content in the materials corresponding to a temperature of 20 °C
and the relative humidity of the surrounding air only exceeding 65 % for a few weeks per year.
NOTE: In service class 1 the average equilibrium moisture content in most softwoods will not exceed 12 %.
3.8
service class 2:
service class characterized by a moisture content in the materials corresponding to a temperature of 20 °C
and the relative humidity of the surrounding air only exceeding 85 % for a few wee
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