prEN 15416-3

SLOVENSKI STANDARD
01-junij-2024
Lepila (razen fenolnih ali aminskih) za nosilne lesene konstrukcije - Preskusne
metode - 3. del: Preskus deformacij lezenja v cikličnih klimatskih pogojih s
preskušanci pod upogibno-strižno obremenitvijo
Adhesives for load bearing timber structures other than phenolic and aminoplastic - Test
methods - Part 3: Creep deformation test at cyclic climate conditions with specimens
loaded in bending shear
Klebstoffe für tragende Holzbauteile ausgenommen Phenolharzklebstoffe und
Aminoplaste - Prüfverfahren - Teil 3: Prüfung der Kriechverformung unter zyklischen
Klimabedingungen an Prüfkörpern bei Biege-Scherbeanspruchung
Adhésifs pour structures portantes en bois de type autre que phénolique et aminoplaste -
Méthodes d'essais - Partie 3 : Essai de déformation par fluage dans des conditions
climatiques cycliques avec des éprouvettes chargées en cisaillement par flexion
Ta slovenski standard je istoveten z: prEN 15416-3
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 15416-3:2017+A1:2019
English Version
Adhesives for load bearing timber structures other than
phenolic and aminoplastic - Test methods - Part 3: Creep
deformation test at cyclic climate conditions with
specimens loaded in bending shear
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 3 : Essai de déformation par fluage - Teil 3: Prüfung der Kriechverformung unter
dans des conditions climatiques cycliques avec des zyklischen Klimabedingungen an Prüfkörpern bei
éprouvettes chargées en cisaillement par flexion Biege-Scherbeanspruchung
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 15416-3:2024 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 . 7
5 Apparatus . 7
5.1 Test jig . 7
5.2 Climate chamber . 8
5.3 Measuring gauge . 8
6 Preparation of specimens . 8
6.1 General. 8
6.2 Option 1 . 8
6.3 Option 2 . 10
7 Test procedure, evaluation and expression of results . 11
7.1 Test procedure . 11
7.2 Evaluation and expression of results . 12
8 Test report . 13

European foreword
This document (prEN 15416-3:2024) 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 15416-3:2017+A1:2019.
This document includes the following significant technical changes with respect to
EN 15416-3:2017+A1:2019:
— terms and definitions for glue line and close contact glue line added;
— in 5.1 Figure 1 corrected;
— glue line thickness for different application areas in 6.1 described in more detail;
— editorial changes.
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 — 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 document can have negative environmental
impact. As technological advantages lead to better alternatives for these materials, they will be eliminated
from this document to the extent possible.
At the end of the test, it is recommended that the user of this document take care to carry out an
appropriate disposal of the wastes, according to local regulation.

1 Scope
This document specifies a method for determining the creep deformation of bonded specimens loaded in
bending shear. It is applicable to adhesives used in load bearing timber structures.
It is suitable for the following applications:
a) for assessing the compliance of adhesives to EN 15425 and EN 16254;
b) for assessing the suitability and quality of adhesives for load bearing timber structures.
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 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 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 301, Adhesives, phenolic and aminoplastic, for load-bearing timber structures — Classification and
performance requirements
EN 923, Adhesives — Terms and definitions
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
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 923 and the following apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at https://www.electropedia.org/
3.1
glue line
adhesive layer between the wood members
3.2
close contact glue line
glue line of thickness maximum 0,1 mm
Note 1 to entry: Close contact glue line can be achieved by pressing together two plane wood members with a
clamping pressure of (0,8 ± 0,1) N/mm without additional grooves, spacers or similar devices.
3.3
relative creep value
k (t)
def
time-dependent increase of the deformation of one specimen
Note 1 to entry: By means of the deflection w (t) and the initial deflection w (0), the relative creep value is
calculated using Formula (1).
w t
( )
k ()t = − 1 (1)
def
w 0
( )
where
w(t) is the deflection at time t;
w(0) is the initial deflection immediately after initial loading, measured 1 min after the
loading of the individual specimen;
k (t) is the relative creep value.
def
3.4
ratio of relative creep
Rc (t)
i
ratio of the relative creep values k (t) of two matched specimens, tested adhesive, i and PRF, i, at time t
def
Note 1 to entry: By means of k (t), tested adhesive, i and k (t), PRF, i with
...