EN 302-6:2023

Adhesives for load-bearing timber structures - Test methods - Part 6: Determination of the minimum pressing time under referenced conditions

This document specifies a method of determining the minimum pressing time for two glue line thicknesses, close contact glue line and thick glue line (between 0,3 mm and 8 mm), at three temperatures. It is applicable to adhesives used in load-bearing timber products.
This document is only intended for obtaining a reliable base of comparison of pressing time between adhesives. The method gives results that cannot be applied to the safe manufacture of timber structures without modifications for the influences of timber density/absorbency, moisture content, factory temperature and relative air humidity.

Klebstoffe für tragende Holzbauteile - Prüfverfahren - Teil 6: Bestimmung der Mindestpresszeit bei Referenzbedingungen

Dieses Dokument legt ein Verfahren zur Bestimmung der Mindestpresszeit für zwei Klebstofffugendicken, d. h. eine dünne Klebstofffuge und eine dicke Klebstofffuge (zwischen 0,3 mm und 8 mm), bei drei Temperaturen fest. Es ist anwendbar für Klebstoffe für tragende Holzbauteile.
Dieses Dokument dient nur dazu, die Mindestpresszeiten von Klebstoffen auf einer zuverlässigen Grundlage zu vergleichen. Die nach diesem Verfahren erhaltenen Ergebnisse können nicht unverändert für die zuverlässige Herstellung von Holzbauteilen verwendet werden, ohne die Einflüsse von Rohdichte und Absorptionsvermögen des Holzes, Feuchtegehalt, Verarbeitungstemperatur und relativer Luftfeuchte zu berücksichtigen.

Adhésifs pour structures portantes en bois - Méthodes d’essai - Partie 6 : Détermination du temps de pressage minimal dans des conditions de référence

Le présent document spécifie une méthode qui permet de déterminer le temps de pressage minimal pour deux épaisseurs de joint de colle (joint de colle mince et joint de colle épais entre 0,3 mm et 8 mm), à trois températures. Il s’applique aux adhésifs utilisés dans les structures portantes en bois.
Le présent document vise uniquement à obtenir une base fiable de comparaison du temps de pressage des adhésifs. Cette méthode fournit des résultats qui ne sont pas applicables sans risque à la fabrication de structures en bois, sans des modifications prenant en compte l’influence de la masse volumique du bois et de son pouvoir d’absorption, de sa teneur en humidité ainsi que de la température et de l’humidité relative de l’air dans l’usine.

Lepila za nosilne lesene konstrukcije - Preskusne metode - 6. del: Določanje najkrajšega časa stiskanja pri referenčnih pogojih

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 - Adhesives for wood and derived timber products
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 15-Feb-2023
• Due Date: 09-Dec-2022
• Completion Date: 15-Feb-2023
• Ref Project: SIST EN 302-6:2023 - Adhesives for load-bearing timber structures - Test methods - Part 6: Determination of the minimum pressing time under referenced conditions

Relations

• Replaces: EN 302-6:2013 - Adhesives for load-bearing timber structures - Test methods - Part 6: Determination of the minimum pressing time under referenced conditions
• Effective Date: 19-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 302-6:2023
01-april-2023
Lepila za nosilne lesene konstrukcije - Preskusne metode - 6. del: Določanje
najkrajšega časa stiskanja pri referenčnih pogojih

Adhesives for load-bearing timber structures - Test methods - Part 6: Determination of

the minimum pressing time under referenced conditions
Klebstoffe für tragende Holzbauteile - Prüfverfahren - Teil 6: Bestimmung der
Mindestpresszeit bei Referenzbedingungen

Adhésifs pour structures portantes en bois - Méthodes d’essai - Partie 6 : Détermination

du temps de pressage minimal dans des conditions de référence
Ta slovenski standard je istoveten z: EN 302-6:2023
ICS:
83.180 Lepila Adhesives
91.080.20 Lesene konstrukcije Timber structures
SIST EN 302-6:2023 en

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

---------------------- Page: 1 ----------------------
SIST EN 302-6:2023
---------------------- Page: 2 ----------------------
SIST EN 302-6:2023
EN 302-6
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2023
EUROPÄISCHE NORM
ICS 83.180 Supersedes EN 302-6:2013
English Version
Adhesives for load-bearing timber structures - Test
methods - Part 6: Determination of the minimum pressing
time under referenced conditions

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

d'essai - Partie 6 : Détermination du temps de pressage Teil 6: Bestimmung der Mindestpresszeit bei

minimal dans des conditions de référence Referenzbedingungen
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 302-6:2023 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN 302-6:2023
EN 302-6:2023 (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 Procedure........................................................................................................................................................... 8

7.1 General ................................................................................................................................................................ 8

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

7.3 Preparation of test specimens .................................................................................................................... 8

7.4 Test procedure ................................................................................................................................................. 8

8 Expression of results ...................................................................................................................................... 9

8.1 Tensile shear strength ................................................................................................................................... 9

8.2 Failure mode ..................................................................................................................................................... 9

9 Calculation of minimum pressing time ................................................................................................... 9

10 Test report ......................................................................................................................................................... 9

10.1 Adhesives ........................................................................................................................................................... 9

10.2 Preparation of test pieces and testing procedure ............................................................................... 9

10.3 Test results ..................................................................................................................................................... 10

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SIST EN 302-6:2023
EN 302-6:2023 (E)
European foreword

This document (EN 302-6:2023) 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 302-6:2013.
The main changes compared to the previous edition are listed below:
a) the list of standards in the Introduction has been updated;
b) one new Clause (Symbols) has been introduced;
c) Clause 7 Procedure has been changed;
d) Clause 8 Expression of results has been added;
e) Clause 9 Calculation of minimum pressing time has been added;
f) Clause 10 Test report has been changed.

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.
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SIST EN 302-6:2023
EN 302-6:2023 (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 and

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 302-6:2023
EN 302-6:2023 (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, requireme
...

SLOVENSKI STANDARD
oSIST prEN 302-6:2021
01-november-2021
Nadomešča:
SIST EN 302-6:2013
Lepila za nosilne lesene konstrukcije - Preskusne metode - 6. del: Določanje
najkrajšega časa stiskanja pri referenčnih pogojih

Adhesives for load-bearing timber structures - Test methods - Part 6: Determination of

the minimum pressing time under referenced conditions
Klebstoffe für tragende Holzbauteile - Prüfverfahren - Teil 6: Bestimmung der
Mindestpresszeit bei Referenzbedingungen

Adhésifs pour structures portantes en bois - Méthodes d'essai - Partie 6: Détermination

du temps de serrage minimum dans des conditions de référence
Ta slovenski standard je istoveten z: prEN 302-6
ICS:
83.180 Lepila Adhesives
91.080.20 Lesene konstrukcije Timber structures
oSIST prEN 302-6:2021 en

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

---------------------- Page: 1 ----------------------
oSIST prEN 302-6:2021
---------------------- Page: 2 ----------------------
oSIST prEN 302-6:2021
DRAFT
EUROPEAN STANDARD
prEN 302-6
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2021
ICS 83.180 Will supersede EN 302-6:2013
English Version
Adhesives for load-bearing timber structures - Test
methods - Part 6: Determination of the minimum pressing
time under referenced conditions

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

d'essai - Partie 6: Détermination du temps de serrage Teil 6: Bestimmung der Mindestpresszeit bei

minimum dans des conditions de référence Referenzbedingungen

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 302-6:2021 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
oSIST prEN 302-6:2021
prEN 302-6:2021 (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 Procedure .......................................................................................................................................................... 7

7.1 General................................................................................................................................................................ 7

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

7.3 Preparation of test specimens ................................................................................................................... 8

7.4 Test procedure ................................................................................................................................................. 8

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

8.1 Tensile shear strength .................................................................................................................................. 8

8.2 Failure mode ..................................................................................................................................................... 9

9 Requirement ..................................................................................................................................................... 9

10 Test report ......................................................................................................................................................... 9

---------------------- Page: 4 ----------------------
oSIST prEN 302-6:2021
prEN 302-6:2021 (E)
European foreword

This document (prEN 302-6:2021) 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 302-6:2013.

In comparison with the previous edition, the following technical modifications have been made:

— list of standards in Introduction updated;
— one new clause (Symbols) is introduced;
— Clause 7 – Procedure has been changed;
— Clause 8 – Expression of results has been added;
— Clause 9 – Requirement has been added.
---------------------- Page: 5 ----------------------
oSIST prEN 302-6:2021
prEN 302-6:2021 (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

polymerised 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 (all parts), 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 (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 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 epox
...