EN 302-3:2023

Adhesives for load-bearing timber structures - Test methods - Part 3: Determination of the effect of acid damage to wood fibres by temperature and humidity cycling on the transverse tensile strength

This document specifies a method for determining the effect on bond strength of damage to wood fibres caused by the action of acids from the adhesive or primer used in the gluing process during climatic cycling.
It is applicable to the following applications:
a)   for assessing the compliance of adhesives with EN 301, EN 15425 and EN 16254;
b)   for assessing the suitability and quality of adhesives for load-bearing timber structures;
c)   for determining if the adhesive after bonding has a damaging influence on the strength of the wood due to chemical action.
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.) or Beech (Fagus sylvatica L.).
This method is not intended to provide data for structural design and does not necessarily represent the performance of the bonded member in service.

Klebstoffe für tragende Holzbauteile - Prüfverfahren - Teil 3: Bestimmung des Einflusses von Säureschädigung der Holzfasern durch Temperatur- und Feuchtezyklen auf die Querzugfestigkeit

Dieses Dokument legt ein Verfahren zur Bestimmung des Einflusses von Holzfaserschädigung auf die Klebfugenfestigkeit, verursacht durch die Wirkung von Säuren des Klebstoffs oder eines im Klebeprozess eingesetzten Haftvermittlers (Primer) während einer zyklischen Klimabeanspruchung, fest.
Es ist für folgende Anwendungsfälle geeignet:
a)   zur Beurteilung der Übereinstimmung von Klebstoffen mit EN 301, EN 15425 und EN 16254;
b)   zur Beurteilung der Eignung und Qualität von Klebstoffen für tragende Holzbauteile;
c)   zur Feststellung, ob der Klebstoff nach der Verklebung infolge chemischer Vorgänge einen schädigenden Einfluss auf die Holzfestigkeit hat.
Diese Prüfung ist hauptsächlich dafür vorgesehen, Leistungsdaten für die Klassifizierung von Klebstoffen für tragende Holzbauteile entsprechend ihrer Eignung zur Verwendung in festgelegten klimatischen Umgebungen zu erhalten. Diese Prüfung wird mit Fichte (Picea abies L.) oder Buche (Fagus sylvatica L.) durchgeführt.
Dieses Verfahren ist nicht dafür vorgesehen, Bemessungswerte bereitzustellen, und gibt nicht zwangsläufig die Leistungsfähigkeit des verklebten Bauteiles im Gebrauch wieder.

Adhésifs pour structures portantes en bois - Méthodes d’essai - Partie 3 : Détermination de l’influence de l’attaque d’acide des fibres de bois, résultant de traitements cycliques en température et humidité sur la résistance à la traction transversale

Le présent document spécifie une méthode qui permet de déterminer l’influence sur la résistance à la rupture d’un joint, de l’attaque des fibres de bois par l’action d’acides contenus dans l’adhésif ou un primaire utilisé lors du processus de collage, pendant des cycles climatiques.
Cette méthode s’applique dans les cas suivants :
a)   évaluation de la conformité des adhésifs à l’EN 301, l’EN 15425 et l’EN 16254 ;
b)   évaluation de l’aptitude à l’emploi et de la qualité des adhésifs pour les structures portantes en bois ;
c)   détermination de l’éventuelle influence dommageable d’une action chimique de l’adhésif après collage sur la résistance du bois.
Cet essai vise principalement à obtenir des données de performance en vue de la classification des adhésifs pour 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 de Norvège (Picea abies L.) ou du hêtre (Fagus sylvatica L.).
Cette méthode n’est pas destinée à fournir des données pour le calcul des structures et ne représente pas nécessairement les performances en service de l’élément collé.

Lepila za nosilne lesene konstrukcije - Preskusne metode - 3. del: Ugotavljanje vpliva kislinskih poškodb lesnih vlaken, nastalih zaradi cikličnih obremenitev s temperaturo in vlago, na prečno natezno trdnost

General Information

• Status: Published
• Publication Date: 30-May-2023
• ICS: 83.180 - Adhesives
• Technical Committee: CEN/TC 193 - Adhesives
• Drafting Committee: CEN/TC 193/SC 1/WG 8 - Revision of EN 301 and EN 302
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 15-Feb-2023
• Due Date: 26-Sep-2023
• Completion Date: 15-Feb-2023
• Ref Project: SIST EN 302-3:2023 - Adhesives for load-bearing timber structures - Test methods - Part 3: Determination of the effect of acid damage to wood fibres by temperature and humidity cycling on the transverse tensile strength

Relations

• Replaces: EN 302-3:2017 - Adhesives for load-bearing timber structures - Test methods - Part 3: Determination of the effect of acid damage to wood fibres by temperature and humidity cycling on the transverse tensile strength
• Effective Date: 19-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 302-3:2023
01-april-2023
Lepila za nosilne lesene konstrukcije - Preskusne metode - 3. del: Ugotavljanje
vpliva kislinskih poškodb lesnih vlaken, nastalih zaradi cikličnih obremenitev s
temperaturo in vlago, na prečno natezno trdnost

Adhesives for load-bearing timber structures - Test methods - Part 3: Determination of

the effect of acid damage to wood fibres by temperature and humidity cycling on the

transverse tensile strength

Klebstoffe für tragende Holzbauteile - Prüfverfahren - Teil 3: Bestimmung des Einflusses

von Säureschädigung der Holzfasern durch Temperatur- und Feuchtezyklen auf die
Querzugfestigkeit

Adhésifs pour structures portantes en bois - Méthodes d’essai - Partie 3 : Détermination

de l’influence de l’attaque d’acide des fibres de bois, résultant de traitements cycliques

en température et humidité sur la résistance à la traction transversale
Ta slovenski standard je istoveten z: EN 302-3:2023
ICS:
83.180 Lepila Adhesives
91.080.20 Lesene konstrukcije Timber structures
SIST EN 302-3:2023 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN 302-3:2023
---------------------- Page: 2 ----------------------
SIST EN 302-3:2023
EN 302-3
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2023
EUROPÄISCHE NORM
ICS 83.180 Supersedes EN 302-3:2017
English Version
Adhesives for load-bearing timber structures - Test
methods - Part 3: Determination of the effect of acid
damage to wood fibres by temperature and humidity
cycling on the transverse tensile strength

Adhésifs pour structures portantes en bois - Méthodes Klebstoffe für tragende Holzbauteile - Prüfverfahren -

d'essai - Partie 3 : Détermination de l'influence de Teil 3: Bestimmung des Einflusses von

l'attaque d'acide des fibres de bois, résultant de Säureschädigung der Holzfasern durch Temperatur-

traitements cycliques en température et humidité sur und Feuchtezyklen auf die Querzugfestigkeit

la résistance à la traction transversale
This European Standard was approved by CEN on 18 December 2022.

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, Türkiye 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

© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 302-3:2023 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN 302-3:2023
EN 302-3:2023 (E)
Contents Page

European foreword ............................................................................................................................................. 3

Introduction .......................................................................................................................................................... 4

1 Scope .......................................................................................................................................................... 6

2 Normative references .......................................................................................................................... 6

3 Terms and definitions ......................................................................................................................... 6

4 Symbols ..................................................................................................................................................... 7

5 Principle ................................................................................................................................................... 7

6 Apparatus ................................................................................................................................................. 7

7 Method ...................................................................................................................................................... 7

7.1 Selection of timber ................................................................................................................................ 7

7.2 Preparation of the bonded assemblies .......................................................................................... 8

7.3 Preparation of the test pieces ........................................................................................................... 9

7.4 Number of test pieces ........................................................................................................................10

7.5 Climatic and cyclic storage conditions ........................................................................................10

7.6 Test procedure .....................................................................................................................................10

8 Expression of results ..........................................................................................................................11

9 Test report .............................................................................................................................................11

9.1 The adhesive .........................................................................................................................................11

9.2 Preparation of test pieces and testing procedures .................................................................11

9.3 Test results ............................................................................................................................................12

---------------------- Page: 4 ----------------------
SIST EN 302-3:2023
EN 302-3:2023 (E)
European foreword

This document (EN 302-3:2023) has been prepared by Technical Committee CEN/TC 193 “Adhesives”,

the secretariat of which is held by UNE.

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 August 2023, and conflicting national standards shall be

withdrawn at the latest by August 2023.

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 302-3:2017.
The main changes compared to the previous edition are listed below:

a) two new standards, EN 17334 and EN 17418, have been included in the list of standards in the

Introduction;
b) two new Clauses (Terms and definitions and Symbols) have been introduced.

Any feedback and questions on this document should be directed to the users’ national standards body.

A complete listing of these bodies can be found on the CEN website.

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, Türkiye and the United

Kingdom.
---------------------- Page: 5 ----------------------
SIST EN 302-3:2023
EN 302-3:2023 (E)
Introduction

This document is one of a series dealing with adhesives for use with timber structures, and is published

in support of the EN 1995 series, Eurocode 5: Design of timber structures. The series consists of five

classification and performance requirements for adhesives for load-bearing timber structures, phenolic

and aminoplastic adhesives (EN 301), one component polyurethane adhesives (EN 15425), emulsion

polymer isocyanate adhesives (EN 16254), two component epoxy and polyurethane adhesives for glued

in rods (EN 17334) and for on-site repair of cracked timber structures (EN 17418), and all together

twelve test methods (EN 302-1, EN 302-2, EN 302-3, EN 302-4, EN 302-5, EN 302-6, EN 302-7, EN 302-8,

EN 15416-1, EN 15416-3, EN 15416-4 and EN 15416-5).
These European standards 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 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
— Part 8: Static load test of multiple bond line specimens in compression shear

EN 15416, Adhesives for load bearing timber structures other than phenolic and aminoplastic — Test

methods:

— Part 1: Long-term tension load test perpendicular to the bond line at varying climate conditions with

specimens perpendicular to the glue line (Glass house test)

— Part 3: Creep deformation test at cyclic climate conditions with specimens loaded in bending shear

— Part 4: Determination of open assembly time under referenced conditions
— Part 5: Determination of minimum pressing time under referenced conditions

EN 15425, Adhesives — One component polyurethane (PUR) for load-bearing timber structures —

Classification and performance requirements

EN 16254, Adhesives — Emulsion polymer isocyanate (EPI) for load-bearing timber structures —

Classification and performance requirements
---------------------- Page: 6 ----------------------
SIST EN 302-3:2023
EN 302-3:2023 (E)

EN 17334, Glued-in rods in glued structural timber products — Testing, requirements and bond shear

strength classification

EN 17418, Two-component epoxy and polyurethane adhesives for on-site repair of cracked timber

structures — Testing, requirements and repair strength verification
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 can have a negative environmental

impact. As technological advantages lead to better alternatives for these materials, they will be eliminated

from this document to the greatest extent possible.

At the end of the test, it is recommended that the users of the standard take care to carry out an

appropriate disposal of the wastes, according to local regulations.
---------------------- Page: 7 ----------------------
SIST EN 302-3:2023
EN 302-3:2023 (E)
1 Scope

This document specifies a method for determining the effect on bond strength of damage to wood fibres

caused by the action of acids from the adhesive or primer used in the gluing process during climatic

cycling.
It is applicable to the following applications:
a) for assessing the compliance of adhesives with EN 301, EN 15425 and EN 16254;

b) for assessing the suitability and quality of adhesives for load-bearing timber structures;

c) for determining if the adhesive after bonding has a damaging influence on the strength of the wood

due to chemical action.

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.) or Beech (Fagus sylvatica L.).

This method is not intended to provide data for structural design and does not necessarily represent the

performance of the bonded member in service.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes require
...

SLOVENSKI STANDARD
oSIST prEN 302-3:2022
01-marec-2022
Lepila za nosilne lesene konstrukcije - Preskusne metode - 3. del: Ugotavljanje
vpliva kislinskih poškodb lesnih vlaken, nastalih zaradi cikličnih obremenitev s
temperaturo in vlago, na prečno natezno trdnost

Adhesives for load-bearing timber structures - Test methods - Part 3: Determination of

the effect of acid damage to wood fibres by temperature and humidity cycling on the

transverse tensile strength

Klebstoffe für tragende Holzbauteile - Prüfverfahren - Teil 3: Bestimmung des Einflusses

von Säureschädigung der Holzfasern durch Temperatur- und Feuchtezyklen auf die
Querzugfestigkeit

Adhésifs pour structures portantes en bois - Méthodes d’essai - Partie 3 : Détermination

de l’influence de l’attaque acide des fibres de bois, résultant de cycles de températures

et d’humidité sur la résistance à la traction transversale
Ta slovenski standard je istoveten z: prEN 302-3
ICS:
83.180 Lepila Adhesives
91.080.20 Lesene konstrukcije Timber structures
oSIST prEN 302-3:2022 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
oSIST prEN 302-3:2022
---------------------- Page: 2 ----------------------
oSIST prEN 302-3:2022
DRAFT
EUROPEAN STANDARD
prEN 302-3
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2021
ICS 83.180
English Version
Adhesives for load-bearing timber structures - Test
methods - Part 3: Determination of the effect of acid
damage to wood fibres by temperature and humidity
cycling on the transverse tensile strength

Adhésifs pour structures portantes en bois - Méthodes Klebstoffe für tragende Holzbauteile - Prüfverfahren -

d'essai - Partie 3 : Détermination de l'influence de Teil 3: Bestimmung des Einflusses von

l'attaque acide des fibres de bois, résultant de cycles de Säureschädigung der Holzfasern durch Temperatur-

températures et d'humidité sur la résistance à la und Feuchtezyklen auf die Querzugfestigkeit

traction transversale

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, Republic of North Macedonia, Romania, Serbia, 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 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. prEN 302-3:2021 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
oSIST prEN 302-3:2022
prEN 302-3:2021 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

Introduction .................................................................................................................................................................... 4

1 Scope .................................................................................................................................................................... 6

2 Normative references .................................................................................................................................... 6

3 Terms and definitions ................................................................................................................................... 6

4 Symbols ............................................................................................................................................................... 6

5 Principle ............................................................................................................................................................. 7

6 Apparatus ........................................................................................................................................................... 7

7 Method ................................................................................................................................................................ 7

7.1 Selection of timber .......................................................................................................................................... 7

7.2 Preparation of the bonded assemblies .................................................................................................... 8

7.3 Preparation of the test pieces ..................................................................................................................... 9

7.4 Number of test pieces ................................................................................................................................. 10

7.5 Climatic and cyclic storage conditions ................................................................................................. 10

7.6 Test procedure .............................................................................................................................................. 10

8 Expression of results ................................................................................................................................... 11

9 Test report ...................................................................................................................................................... 11

Bibliography ................................................................................................................................................................. 13

---------------------- Page: 4 ----------------------
oSIST prEN 302-3:2022
prEN 302-3:2021 (E)
European foreword

This document (prEN 302-3:2021) has been prepared by Technical Committee CEN/TC 193 “Adhesives”,

the secretariat of which is held by UNE.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 302-3:2017.
Compared to EN 302-3:2017 the following modifications have been made:

a) two new standards, EN 17334 and EN 17418, have been included in the list of standards in

Introduction;
b) two new Clauses (Terms and definitions and Symbols) are introduced.
---------------------- Page: 5 ----------------------
oSIST prEN 302-3:2022
prEN 302-3:2021 (E)
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 five classification

and performance requirements for adhesives for load-bearing timber structures, phenolic and

aminoplastic adhesives (EN 301), one component polyurethane adhesives (EN 15425), emulsion

polymerized isocyanate adhesives (EN 16254), two component epoxy and polyurethane adhesives for

glued in rods (EN 17334) and for on-site repair of cracked timber structures (EN 17418), and all together

twelve test methods (EN 302-1, EN 302-2, EN 302-3, EN 302-4, EN 302-5, EN 302-6, EN 302-7 and

EN 302-8, and EN 15416-1, EN 15416-3, EN 15416-4 and EN 15416-5).
These European standards 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 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
— Part 8: Static load test of multiple bond line specimens in compression shear

EN 15416, Adhesives for load bearing timber structures other than phenolic and aminoplastic — Test

methods:

— Part 1: Long-term tension load test perpendicular to the bond line at varying climate conditions with

specimens loaded perpendicular to the glue line (Glasshouse test)

— Part 3: Creep deformation test at cyclic climate conditions with specimens loaded in bending shear

— Part 4: Determination of open assembly time under referenced conditions
— Part 5: Determination of minimum pressing time under referenced conditions

EN 15425, Adhesives — One component polyurethane (PUR) for load bearing timber structures ―

Classification and performance requirements

EN 16254, Adhesives — Emulsion polymerized isocyanate (EPI) for load-bearing timber structures ―

Classification and performance requirements

EN 17334, Glued-in rods in glued structural timber products ― Testing, requirements and bond shear

strength. Classification

EN 17418, Two-component epoxy and polyurethane adhesives for on-site repair of cracked timber

structures ― Testing, requirements, and repair strength verification
---------------------- Page: 6 ----------------------
oSIST prEN 302-3:2022
prEN 302-3:2021 (E)
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 can have a negative environmental

impact. As technological advantages lead to better alternatives for these materials, they will be eliminated

from this document 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.
---------------------- Page: 7 ----------------------
oSIST prEN 302-3:2022
prEN 302-3:2021 (E)
1 Scope

This document specifies a method for determining the effect on bond strength of damage to wood fibres

caused by the action of acids from the adhesive or primer used in the gluing process during climatic

cycling.
It is suitable for the following applications:
a) for assessing the compliance of adhesives with EN 301, EN 15425 and EN 16254;

b) for assessing the suitability and quality of adhesives for load-bearing timber structures;

c) for determining if the adhesive after bonding has a damaging influence on the strength of the wood

due to chemical action.

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.) or Beech (Fagus sylvatica 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 are referred to in the text in such a way that some or all of their content

constitutes requirements 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 923, Adhesives — Terms and d
...