SIST EN 302-4:2013
(Main)Adhesives for load-bearing timber structures - Test methods - Part 4: Determination of the effects of wood shrinkage on the shear strength
Adhesives for load-bearing timber structures - Test methods - Part 4: Determination of the effects of wood shrinkage on the shear strength
This part of EN 302 specifies a method for determining the extent to which wood shrinkage under drying conditions will weaken an adhesive bond. It is suitable for the following applications: a) for assessing the compliance of adhesives with EN 301; b) for assessing the suitability and quality of adhesives for load-bearing timber structures; c) for determining if the adhesive is capable of withstanding stresses due to wood shrinkage without unacceptable loss of strength. This test is intended primarily to obtain performance data for the classification of adhesives for load-bearing timber structures according to their suitability for use in defined climatic environments. This test is carried out on spruce (Picea abies L.). This method is not intended for use to provide numerical design data and does not necessarily represent the performance of the bonded member in service. It is not intended to be used to assess the suitability of adhesives for the manufacture of wood-based panels.
Klebstoffe für tragende Holzbauteile - Prüfverfahren - Teil 4: Bestimmung des Einflusses von Holzschwindung auf die Scherfestigkeit
Dieser Teil von EN 302 legt ein Verfahren zur Bestimmung des Einflusses von Holzschwindung unter Trocknungsbedingungen auf die Scherfestigkeit bei kreuzweiser Verklebung fest.
Er ist für folgende Anwendungsfälle geeignet:
a) zur Beurteilung der Übereinstimmung von Klebstoffen mit EN 301 und EN 15425;
b) zur Beurteilung der Eignung und Qualität von Klebstoffen für tragende Holzbauteile;
c) zum Nachweis, ob der Klebstoff in der Lage ist, den Spannungen infolge Holzschwindung ohne unannehmbaren Festigkeitsverlust standzuhalten.
Diese Prüfung dient hauptsächlich der Ermittlung von Leistungswerten für die Klassifizierung von Klebstoffen für tragende Holzbauteile entsprechend ihrer Eignung zum Einsatz unter festgelegten klimatischen Bedingungen. Diese Prüfung wird mit Fichte (Picea abies L.) durchgeführt.
Dieses Verfahren ist nicht zur Ermittlung von Rechenwerten für die Konstruktion geeignet und gibt nicht zwangsläufig das Verhalten des verklebten Bauteiles in Gebrauch wieder.
Adhésifs pour structures portantes en bois - Méthodes d'essai - Partie 4: Détermination de l’influence du retrait du bois sur la résistance au cisaillement
Cette partie de l’EN 302 décrit une méthode permettant de déterminer l’effet du retrait du bois dans des conditions de séchage sur la résistance au cisaillement de collages croisés.
Elle concerne les applications suivantes :
a) évaluation de la conformité des adhésifs à l’EN 301 et à l’EN 15425 ;
b) évaluation de l’aptitude à l’emploi et de la qualité des adhésifs pour les structures portantes en bois ;
c) détermination de la capacité des adhésifs à supporter des contraintes dues au retrait du bois sans perte de résistance inacceptable.
Le présent essai est principalement destiné à obtenir des données de performances en vue de la classification des adhésifs pour les structures portantes en bois en fonction de leur aptitude à l’utilisation dans des environnements climatiques définis. Cet essai est réalisé sur de l’épicéa (Picea abies L.).
Cette méthode n’est pas destinée à fournir des données de conception numérique et ne représente pas nécessairement les performances de l’élément collé dans son application.
Lepila za nosilne lesene konstrukcije - Preskusne metode - 4. del: Ugotavljanje vpliva krčenja lesa na strižno trdnost
Ta del standarda EN 302 določa metodo za ugotavljanje, do kakšne mere krčenje lesa med sušenjem oslabi sprijemanje lepila. Metoda se uporablja za: a) oceno skladnosti lepil s standardom EN 301; b) oceno ustreznosti in kakovosti lepil za nosilne lesene konstrukcije; c) ugotavljanje, ali lahko lepilo prenese obremenitve zaradi krčenja lesa brez nesprejemljive izgube trdnosti. Ta preskus je namenjen zlasti pridobivanju podatkov o lastnostih za razvrstitev lepil za nosilne lesene konstrukcije glede na njihovo ustreznost za uporabo v opredeljenih podnebnih okoljih. Pri tem poskusu se uporablja smreka (Picea abies L.). Ta metoda ni namenjena za zagotavljanje številčnih podatkov o zasnovi, pri čemer ne predstavlja nujno lastnosti zlepljenega elementa v uporabi. Ni namenjena za oceno ustreznosti lepil za proizvodnjo lesnih plošč.
General Information
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Klebstoffe für tragende Holzbauteile - Prüfverfahren - Teil 4: Bestimmung des Einflusses von Holzschwindung auf die ScherfestigkeitAdhésifs pour structures portantes en bois - Méthodes d'essai - Partie 4: Détermination de l’influence du retrait du bois sur la résistance au cisaillementAdhesives for load-bearing timber structures - Test methods - Part 4: Determination of the effects of wood shrinkage on the shear strength91.080.20Lesene konstrukcijeTimber structures83.180LepilaAdhesivesICS:Ta slovenski standard je istoveten z:EN 302-4:2013SIST EN 302-4:2013en,de01-maj-2013SIST EN 302-4:2013SLOVENSKI
STANDARDSIST EN 302-4:20041DGRPHãþD
SIST EN 302-4:2013
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 302-4
March 2013 ICS 83.180 Supersedes EN 302-4:2004English Version
Adhesives for load-bearing timber structures - Test methods - Part 4: Determination of the effects of wood shrinkage on the shear strength
Adhésifs pour structures portantes en bois - Méthodes d'essai - Partie 4: Détermination de l'influence du retrait du bois sur la résistance au cisaillement
Klebstoffe für tragende Holzbauteile - Prüfverfahren - Teil 4: Bestimmung des Einflusses von Holzschwindung auf die Scherfestigkeit This European Standard was approved by CEN on 5 February 2013.
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, 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.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2013 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 302-4:2013: ESIST EN 302-4:2013
EN 302-4:2013 (E) 2 Contents Page Foreword .3 Introduction .4 1 Scope .6 2 Normative references .6 3 Principle .6 4 Apparatus .6 5 Method .7 5.1 General .7 5.1.1 Selection of timber.7 5.1.2 Preparation of cover pieces .7 5.1.3 Preparation of core pieces .7 5.1.4 Conditioning .8 5.2 Preparation of the bonded assemblies.8 5.3 Number of bonded assemblies . 11 5.4 Dry storage treatment . 11 5.5 Preparation of the test piece . 11 5.6 Climatic storage . 12 5.7 Test procedure . 12 6 Expression of results . 12 7 Test report . 13 7.1 The adhesive . 13 7.2 Preparation of the samples and the testing procedures . 13 7.3 Test results . 13 Bibliography . 14
SIST EN 302-4:2013
EN 302-4:2013 (E) 3 Foreword This document (EN 302-4:2013) has been prepared by Technical Committee CEN/TC 193 “Adhesives”, the secretariat of which is held by AENOR. 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 2013 and conflicting national standards shall be withdrawn at the latest by September 2013. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 302-4:2004. The following modifications have been made: The wood density requirement for Norwegian spruce has been altered; A recommended time period is given for the dry storage treatment. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: 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 the United Kingdom. SIST EN 302-4:2013
EN 302-4:2013 (E) 4 Introduction This document is one of a series dealing with adhesives for use with timber structures, and is published in support of EN 1995, Eurocode 5: Design of timber structures. The series consists of three classification and performance requirements for adhesives for load-bearing timber structures, phenolic and aminoplastic adhesives (EN 301), one component polyurethane adhesives (EN 15425) and emulsion polymerised isocyanate adhesives (prEN 16254), and all together eleven test methods (EN 302 Parts 1 to 7 and EN 15416 Parts 2 to 5). These European Standards have the following titles: EN 301, Adhesives, phenolic and aminoplastic, for load-bearing timber structures — Classification and performance requirements EN 15425, Adhesives — One component polyurethane for load performance requirements prEN 16254, Adhesives — Emulsion polymerized isocyanate (EPI) for load-Classification and performance requirements EN 302, Adhesives for load-bearing timber structures — Test methods
Part 1: Determination of longitudinal tensile shear strength Part 2: Determination of resistance to delamination Part 3: Determination of the effect of acid damage to wood fibres by temperature and humidity cycling on the transverse tensile strength Part 4: Determination of the effects of wood shrinkage on the shear strength Part 5: Determination of maximum assembly time under referenced conditions Part 6: Determination of the minimum pressing time under referenced conditions Part 7: Determination of the working life under referenced conditions EN 15416, Adhesives for load bearing timber structures other than phenolic and aminoplastic — Test methods Part 2: Static load test of multiple bondline specimens in compression shear Part 3: Creep deformation test at cyclic climate conditions with specimens loaded in bending shear Part 4: Determination of open assembly time for one component polyurethane adhesives Part 5: Determination of conventional pressing time Safety statement Persons using this document should be familiar with the normal laboratory practice, if applicable. This document cannot address all of the safety problems, if any, associated with its use. It is the responsibility of the user to establish appropriate safety and health practices and to ensure compliance with any regulatory conditions. SIST EN 302-4:2013
EN 302-4:2013 (E) 5 Environmental statement It is understood that some of the material permitted in this standard can have a negative environmental impact. As technological advantages lead to better alternatives for these materials, they will be eliminated from this standard to the greatest extent possible. At the end of the test, it is recommended that the user of the standard take care to carry out an appropriate disposal of the wastes, according to local regulations. SIST EN 302-4:2013
EN 302-4:2013 (E) 6 1 Scope This European Standard specifies a method for determining the influence of shear strength in crosswise gluing by wood shrinkage under drying conditions. It is suitable for the following applications: a) for assessing the compliance of adhesives with EN 301, EN 15425 and prEN 16254;
b) for assessing the suitability and quality of adhesives for load-bearing timber structures; c) for determining if the adhesive is capable of withstanding stresses due to wood shrinkage without unacceptable loss of strength.
This test is intended primarily to obtain performance data for the classification of adhesives for load-bearing timber structures according to their suitability for use in defined climatic environments. This test is carried out on Norway spruce (Picea abies L.).
This method is not intended for use to provide numerical design data and does not necessarily represent the performance of the bonded member in service.
2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 301, Adhesives, phe
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SLOVENSKI STANDARD
oSIST prEN 302-4 rev:2011
01-september-2011
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Adhesives for load-bearing timber structures - Test methods - Part 4: Determination of
the effects of wood shrinkage on the shear strength
Klebstoffe für tragende Holzbauteile - Prüfverfahren - Teil 4: Bestimmung des Einflusses
von Holzschwindung auf die Scherfestigkeit
Adhésifs pour structures portantes en bois - Méthodes d'essai - Partie 4: Détermination
de l’influence du retrait du bois sur la résistance au cisaillement
Ta slovenski standard je istoveten z: prEN 302-4 rev
ICS:
83.180 Lepila Adhesives
91.080.20 Lesene konstrukcije Timber structures
oSIST prEN 302-4 rev:2011 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN 302-4 rev:2011
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oSIST prEN 302-4 rev:2011
EUROPEAN STANDARD
DRAFT
prEN 302-4 rev
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2011
ICS 83.180 Will supersede EN 302-4:2004
English Version
Adhesives for load-bearing timber structures - Test methods -
Part 4: Determination of the effects of wood shrinkage on the
shear strength
Adhésifs pour structures portantes en bois - Méthodes Klebstoffe für tragende Holzbauteile - Prüfverfahren - Teil 4:
d'essai - Partie 4: Détermination de l'influence du retrait du Bestimmung des Einflusses von Holzschwindung auf die
bois sur la résistance au cisaillement Scherfestigkeit
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 193.
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, 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. prEN 302-4 rev:2011: E
worldwide for CEN national Members.
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oSIST prEN 302-4 rev:2011
prEN 302-4:2011 (E)
Contents Page
Foreword .3
1 Scope .5
2 Normative references .5
3 Principle .5
4 Apparatus .6
4.1 Testing machine.6
4.2 Climatic cabinets .6
5 Method .6
5.1 Selection of timber.6
5.1.1 General .6
5.1.2 Preparation of cover pieces .6
5.1.3 Preparation of core pieces .6
5.1.4 Conditioning .7
5.2 Preparation of the bonded assemblies.7
5.3 Number of bonded assemblies . 10
5.4 Dry storage treatment . 10
5.5 Preparation of the test pieces . 10
5.6 Climatic storage . 11
5.7 Test procedure . 11
6 Expression of results . 11
7 Test report . 12
7.1 The adhesive . 12
7.2 Preparation of the samples and the testing procedures . 12
7.3 Test results . 12
2
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oSIST prEN 302-4 rev:2011
prEN 302-4:2011 (E)
Foreword
This document (prEN 302-4:2011) has been prepared by Technical Committee CEN/TC 193 “Adhesives for
wood and derived timber products”, the secretariat of which is held by AENOR.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 302-4:2004.
This document is one of a series dealing with adhesives for use with timber structures, and is published in
support to EN 1995 Eurocode 5: Design of timber structures. The series consists of a classification and
performance requirements for phenolic and aminoplastic polycondensation adhesives for use in different
climatic conditions (EN 301), five test methods (EN 302 Parts 1 to 4 and EN 15416-2) used to assess the
performance of adhesives after specified heat and humidity treatments, and three test methods (EN 302 Parts
5 to 7) to characterize the working properties of the adhesive.
EN 301, EN 302 Parts 1 to 7 and EN 15416-2 have the following titles.
EN 301, Adhesives, phenolic and aminoplastic, for load-bearing timber structures — Classification and
performance requirements
EN 302, Adhesives for load-bearing timber structures — Test methods
Part 1: Determination of longitudinal tensile shear strength
Part 2: Determination of resistance to delamination
Part 3: Determination of the effect of acid damage to wood fibres by temperature and humidity cycling on
the transverse tensile strength
Part 4: Determination of the effects of wood shrinkage on the shear strength
Part 5: Determination of the maximum assembly time under referenced conditions
Part 6: Determination of the minimum pressing time under referenced conditions
Part 7: Determination of the working life under referenced conditions
EN 15416-2, Adhesives for load bearing timber structures other than phenolic and aminoplastic — Test
methods — Part 2: Static load test of multiple bondline specimens in compression shear.
Safety statement
Persons using this document should be familiar with the normal laboratory practice, if applicable. This
document cannot address all of the safety problems, if any, associated with its use. It is the responsibility of
the user to establish appropriate safety and health practices and to ensure compliance with any regulatory
conditions.
Environmental statement
It is understood that some of the material permitted in this standard may have negative environmental impact.
3
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oSIST prEN 302-4 rev:2011
prEN 302-4:2011 (E)
As technological advantages lead to better alternatives for these materials, they will be eliminated from this
standard to the extent possible.
At the end of the test, the user of the standard shall take care to carry out an appropriate disposal of the
wastes, according to local regulation.
4
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oSIST prEN 302-4 rev:2011
prEN 302-4:2011 (E)
1 Scope
This part of EN 302 specifies a method for determining the influence of shear strength in crosswise gluing by
wood shrinkage under drying conditions.
It is suitable for the following applications:
a) for assessing the compliance of adhesives with EN 301 and EN 15425;
b) for assessing the suitability and quality of adhesives for load-bearing timber structures;
c) for determining if the adhesive is capable of withstanding stresses due to wood shrinkage without
unacceptable loss of strength.
This test is intended primarily to obtain performance data for the classification of adhesives for load-bearing
timber structures according to their suitability for use in defined climatic environments. This test is carried out
on spruce (Picea abies L.).
This method is not intended for use to provide numerical design data and does not necessarily represent the
performance of the bonded member in service.
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 301, Adhesives, phenolic and aminoplastic, for load-bearing timber structures — Classification and
performance requirements
EN 1245, Adhesives — Determination of pH
EN 13183-1, Moisture content of a piece of sawn timber. Part 1: Determination by oven dry method.
EN 15425, Adhesives - One component polyurethane for load bearing timber structures - Classification and
performance requirements
...
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