prEN 15416-4

Adhesives for load bearing timber structures other than phenolic and aminoplastic - Test methods - Part 4: Determination of open assembly time under referenced conditions

This document specifies a laboratory method of determining the open assembly time in standard climate (20 ± 2) °C and (65 ± 5) % relative humidity (hereafter climate [20/65]).
This document is intended to determine the open assembly time using a defined procedure for obtaining a reliable base for comparison of open assembly time between adhesives under referenced conditions.
The method gives a result that cannot be applied to the safe manufacture of timber structures without taking into account the influence of factors such as timber density, moisture content, factory temperature and relative air humidity.

Klebstoffe für tragende Holzbauteile ausgenommen Phenolharzklebstoffe und Aminoplaste - Prüfverfahren - Teil 4: Bestimmung der offenen Wartezeit bei Referenzbedingungen

Dieses Dokument legt ein Laborverfahren zur Bestimmung der offenen Wartezeit in einem Normalklima (20 ± 2) °C und (65 ± 5) % relative Luftfeuchte (nachstehend Normalklima [20/65]) fest.
Dieses Dokument dient zur Bestimmung der offenen Wartezeit unter Anwendung eines festgelegten Verfahrens, um eine zuverlässige Grundlage zum Vergleich der offenen Wartezeiten verschiedener Klebstoffe bei Referenzbedingungen zu schaffen.
Das Verfahren führt zu einem Ergebnis, das für die sichere Herstellung von Holzbauteilen nur unter Berücksichtigung der Einflussfaktoren, wie z. B. Rohdichte/Feuchtegehalt des Holzes, Werkstemperatur und relative Luftfeuchte, zugrunde gelegt werden kann.

Adhésifs pour structures portantes en bois de type autre que phénolique et aminoplaste - Méthodes d'essais - Partie 4 : Détermination du temps d'assemblage ouvert dans des conditions de référence

Le présent document spécifie une méthode de détermination en laboratoire du temps d’assemblage ouvert sous un climat normal de (20 ± 2) °C et (65 ± 5) % d’humidité relative (ci-après climat [20/65]).
Le présent document est destiné à déterminer le temps d’assemblage ouvert en utilisant un mode opératoire défini afin d’obtenir une base fiable de comparaison des temps d’assemblage ouvert de différents adhésifs dans des conditions de référence.
La méthode conduit à un résultat qui ne peut pas être utilisé pour une fabrication sûre des structures en bois sans tenir compte de l’influence de facteurs tels que la masse volumique du bois, sa teneur en humidité, la température de l’usine et l’humidité relative de l’air.

Lepila (razen fenolnih ali aminskih) za nosilne lesene konstrukcije - Preskusne metode - 4. del: Ugotavljanje odprtega časa pri referenčnih pogojih

General Information

• Status: Not Published
• Publication Date: 18-Sep-2025
• ICS: 83.180 - Adhesives
• Technical Committee: CEN/TC 193 - Adhesives
• Drafting Committee: CEN/TC 193/SC 1/WG 4 - Tests for 'Novel' load bearing adhesives for wood
• Current Stage: 4020 - Submission to enquiry - Enquiry
• Start Date: 02-May-2024
• Due Date: 03-May-2024
• Completion Date: 02-May-2024
• Ref Project: oSIST prEN 15416-4:2024 - Adhesives for load bearing timber structures other than phenolic and aminoplastic - Test methods - Part 4: Determination of open assembly time under referenced conditions

Relations

• Revises: EN 15416-4:2017 - Adhesives for load bearing timber structures other than phenolic and aminoplastic - Test methods - Part 4: Determination of open assembly time under referenced conditions
• Effective Date: 14-Jun-2023

Standards Content (Sample)

SLOVENSKI STANDARD
01-junij-2024
Lepila (razen fenolnih ali aminskih) za nosilne lesene konstrukcije - Preskusne
metode - 4. del: Ugotavljanje odprtega časa pri referenčnih pogojih
Adhesives for load bearing timber structures other than phenolic and aminoplastic - Test
methods - Part 4: Determination of open assembly time under referenced conditions
Klebstoffe für tragende Holzbauteile ausgenommen Phenolharzklebstoffe und
Aminoplaste - Prüfverfahren - Teil 4: Bestimmung der offenen Wartezeit bei
Referenzbedingungen
Adhésifs pour structures portantes en bois de type autre que phénolique et aminoplaste -
Méthodes d'essais - Partie 4 : Détermination du temps d'assemblage ouvert dans des
conditions de référence
Ta slovenski standard je istoveten z: prEN 15416-4
ICS:
83.180 Lepila Adhesives
91.080.20 Lesene konstrukcije Timber structures
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2024
ICS 83.180 Will supersede EN 15416-4:2017
English Version
Adhesives for load bearing timber structures other than
phenolic and aminoplastic - Test methods - Part 4:
Determination of open assembly time under referenced
conditions
Adhésifs pour structures portantes en bois de type Klebstoffe für tragende Holzbauteile ausgenommen
autre que phénolique et aminoplaste - Méthodes Phenolharzklebstoffe und Aminoplaste - Prüfverfahren
d'essais - Partie 4 : Détermination du temps - Teil 4: Bestimmung der offenen Wartezeit bei
d'assemblage ouvert 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, Türkiye 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
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 15416-4:2024 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
Introduction . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Principle . 6
5 Apparatus . 7
6 Procedure . 7
6.1 General. 7
6.2 Preparation of bonded assemblies . 7
6.3 Preparation of samples for testing . 8
6.4 Test procedure . 8
7 Expression of results . 8
7.1 Tensile shear strength . 8
7.2 Failure mode . 8
7.3 Glue line thickness . 8
8 Requirement . 9
9 Test report . 9
9.1 General information . 9
9.2 Information about the adhesive . 9
9.3 Preparation of test pieces and testing procedure . 9
9.4 Test results . 10

European foreword
This document (prEN 15416-4:2024) 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 15416-4:2017.
This document includes the following significant technical changes with respect to EN 15416-4:2017:
a) terms and definitions for glue line added;
b) determination of glue line thickness in 6.3 described in more detail;
c) expression of glue line thickness added as 7.3;
d) different spread rates and glue line thicknesses considered in the requirement in Clause 8.
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.

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 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 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
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 —
...