EN 16254:2023
(Main)Adhesives - Emulsion polymer isocyanate (EPI) for load-bearing timber structures - Classification and performance requirements
Adhesives - Emulsion polymer isocyanate (EPI) for load-bearing timber structures - Classification and performance requirements
This document establishes a classification for emulsion polymer isocyanate (EPI) adhesives according to their suitability for use in load-bearing timber products in defined climatic exposure conditions, and specifies performance requirements for such adhesives for the industrial manufacture of load-bearing timber products only.
The performance requirements of this document are applicable to the adhesives only, not to the timber products. This document does not cover the performance of adhesives for on-site gluing (except for factory-like conditions) or the production of wood-based panels, except solid wood panels, or modified and stabilized wood with considerably reduced swelling and shrinkage properties, e.g. acetylated wood, heat treated wood and polymer impregnated wood.
This document is primarily intended for use by adhesive manufacturers and for use in timber products bonded with adhesives, to assess or control the quality of adhesives. This document only specifies the performance of an adhesive for use in an environment corresponding to the defined conditions.
Such an adhesive meeting the requirements of this document for its type is adequate for use in load-bearing timber products, provided that the bonding process has been carried out according to an appropriate product standard.
Klebstoffe - Emulsionspolymer-Isocyanat (EPI) für tragende Holzbauteile - Klassifizierung und Leistungsanforderungen
Dieses Dokument stellt eine Klassifizierung für Klebstoffe aus Emulsionspolymer-Isocyanat (EPI) entsprechend ihrer Eignung zur Verwendung für tragende Holzprodukte unter bestimmten Klimabedingungen auf und legt die Leistungsanforderungen für derartige Klebstoffe ausschließlich zur werksmäßigen Herstellung von tragenden Holzprodukten fest.
Die Leistungsanforderungen in diesem Dokument sind lediglich für den Klebstoff, nicht für das Holzprodukt anwendbar. Dieses Dokument behandelt weder das Leistungsverhalten von Klebstoffen für die Vor-Ort-Verklebung (ausgenommen bei werksähnlichen Bedingungen) noch die Produktion von Holzwerkstoffen, ausgenommen Massivholzplatten. Es ist nicht für modifiziertes und vergütetes Holz mit beträchtlich verringerten Quellungs- und Schwindungseigenschaften anwendbar, wie z. B. acetyliertes Holz, wärmebehandeltes Holz und mit Kunstharz imprägniertes Holz.
Dieses Dokument ist in erster Linie für die Verwendung durch die Hersteller der Klebstoffe und der verklebten Holzprodukte bestimmt, um die Qualität von Klebstoffen zu beurteilen oder zu überprüfen. Dieses Dokument legt nur das Leistungsverhalten eines Klebstoffes für den Einsatz in einer Umgebung fest, die den festgelegten Bedingungen entspricht.
Klebstoffe, die die Anforderungen dieses Dokuments erfüllen, sind für den Einsatz in tragenden Holzprodukten geeignet, vorausgesetzt, dass der Verklebungsvorgang nach einer entsprechenden Produktnorm vorgenommen wurde.
Adhésifs - Isocyanate de polymère en émulsion (EPI) pour structures portantes en bois - Classification et exigences de performance
Le présent document établit une classification des adhésifs isocyanate de polymère en émulsion (EPI) en fonction de leur aptitude à l’emploi dans les structures portantes en bois dans des conditions d’exposition climatique définies, et spécifie les exigences de performance applicables à ces adhésifs uniquement lorsqu’ils sont utilisés pour la fabrication en usine de structures portantes en bois, ou dans des conditions semblables à la fabrication en usine.
Les exigences relatives à la performance définies dans le présent document ne s’appliquent qu’aux adhésifs et non aux produits en bois. Le présent document ne couvre pas la performance des adhésifs utilisés pour le collage sur site (à l’exception des conditions semblables à la fabrication en usine) ou pour la fabrication de panneaux à base de bois, à l’exception des panneaux en bois massif, ou pour le bois modifié et stabilisé ayant une propension considérablement réduite au gonflement et au retrait, par exemple le bois acétylé, le bois traité à la chaleur et le bois imprégné de polymère.
Le présent document s’adresse avant tout aux fabricants d’adhésifs pour leur permettre, dans le domaine des produits en bois collés, d’évaluer ou de contrôler la qualité des adhésifs. Le présent document spécifie la performance d’un adhésif uniquement dans l’environnement correspondant aux conditions définies.
Un adhésif répondant aux exigences du présent document relatives à son type peut être utilisé dans des structures portantes en bois, à condition que le processus de collage ait été réalisé conformément à une norme de produit appropriée.
Lepila - Emulzijsko polimerizirani izocianat (EPI) za nosilne lesene konstrukcije - Razvrstitev in zahtevane lastnosti
Ta dokument določa razvrstitev za lepila na osnovi emulzijsko polimeriziranega izocianata (EPI) v skladu z njihovo primernostjo za uporabo pri nosilnih lesenih izdelkih v določenih pogojih izpostavljenosti podnebnim razmeram in določa zahteve glede učinkovitosti za ta lepila, izključno za industrijsko izdelavo nosilnih lesenih izdelkov.
Zahteve glede učinkovitosti v tem dokumentu se uporabljajo samo za lepila, ne za lesene izdelke. Ta dokument ne zajema lastnosti lepil za lepljenje na mestu uporabe (razen v pogojih, podobnih tovarniškim) niti proizvodnje lesnih plošč, razen polnih lesnih plošč, ali obdelanega in stabiliziranega lesa, ki bistveno manj nabreka in se krči, kot so acetiliran les, toplotno obdelan les in polimerno impregniran les.
Ta dokument je namenjen predvsem za proizvajalce lepil in za uporabo pri lesenih izdelkih, vezanih z lepili, za ocenjevanje ali nadzor kakovosti lepil. Ta dokument določa lastnosti lepila izključno za uporabo v okolju, ki ustreza podanim pogojem.
Tako lepilo, ki izpolnjuje zahteve tega dokumenta za svojo vrsto, je primerno za uporabo pri nosilnih lesenih izdelkih pod pogojem, da je bil postopek vezave izveden v skladu z ustreznim standardom za izdelek.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-april-2023
Lepila - Emulzijsko polimerizirani izocianat (EPI) za nosilne lesene konstrukcije -
Razvrstitev in zahtevane lastnosti
Adhesives - Emulsion polymer isocyanate (EPI) for load-bearing timber structures -
Classification and performance requirements
Klebstoffe - Emulsionspolymerisiertes Isocyanat (EPI) für tragende Holzbauteile -
Klassifizierung und Leistungsanforderungen
Adhésifs - Isocyanate de polymère en émulsion (EPI) pour structures portantes en bois -
Classification et exigences de performance
Ta slovenski standard je istoveten z: EN 16254:2023
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.
EN 16254
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2023
EUROPÄISCHE NORM
ICS 83.180 Supersedes EN 16254:2013+A1:2016
English Version
Adhesives - Emulsion polymer isocyanate (EPI) for load-
bearing timber structures - Classification and performance
requirements
Adhésifs - Isocyanate de polymère en émulsion (EPI) Klebstoffe - Emulsionspolymerisiertes Isocyanat (EPI)
pour structures portantes en bois - Classification et für tragende Holzbauteile - Klassifizierung und
exigences de performance Leistungsanforderungen
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 16254:2023 E
worldwide for CEN national Members.
Contents Page
European foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Classification . 8
5 Requirements . 10
5.1 General . 10
5.2 Bond strength in longitudinal tensile shear test . 10
5.3 Resistance to delamination . 11
5.4 Tensile strength perpendicular to the bond line after climatic treatment (acid
damage test) . 12
5.5 Effect of wood shrinkage on the shear strength. 12
5.6 Static load test of multiple bond line specimens in compression shear . 12
5.7 Creep deformation test at cyclic climate conditions with specimens loaded in
bending shear . 13
5.8 Long term sustained load test at cyclic climate conditions with specimens loaded
perpendicular to the bond line (“Glass house test”) . 13
5.9 Delamination test on finger-jointed test pieces . 13
6 Test methods . 13
6.1 General . 13
6.2 Determination of bond strength in longitudinal tensile shear test . 13
6.3 Determination of resistance to delamination . 13
6.4 Determination of tensile strength perpendicular to the bond line after climatic
treatment (acid damage test) . 13
6.5 Determination of the effect of wood shrinkage on the shear strength . 13
6.6 Static load test of multiple bond line specimens in compression shear . 14
6.7 Creep deformation test with specimens loaded in bending shear . 14
6.8 Long term sustained load test at cyclic climate conditions with specimens loaded
perpendicular to the bond line (“Glass house test”) . 14
6.9 Delamination test on finger-jointed test pieces . 14
7 Working properties of the adhesive . 14
7.1 General . 14
7.2 Determination of working life under reference conditions . 14
7.3 Determination of open assembly time under reference conditions. 15
7.4 Determination of pressing time under reference conditions . 15
8 Marking and labelling . 15
Annex A (normative) Delamination test for bonding of finger-joints . 16
A.1 Production of the specimens . 16
A.2 Testing . 17
A.3 Expression of results . 17
A.4 Test report . 18
A.4.1 Adhesive . 18
A.4.2 Preparation of test pieces and testing procedure . 18
A.4.3 Test results . 18
Annex B (informative) Product limitations and glulam production control for beams
produced with Small dimension adhesives . 19
B.1 Product limitations . 19
B.2 Control of the glue line thickness . 19
Bibliography . 20
European foreword
This document (EN 16254:2023) 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 16254:2013+A1:2016.
EN 16254:2013+A1:2016:
a) the title has been changed;
b) the designation of adhesive types has been modified and aligned with EN 301 and EN 15425;
c) the reference to EN 15416-2 has been replaced by reference to EN 302-8;
d) for the delamination test according to EN 302-2 with preservative treated wood, a test with Scots
pine (Pinus sylvestris) and Silver fir (Abieas alba) covers also Norway spruce (Picea abies L.);
e) for adhesive type FJ, the test according to EN 302-2 is required only with short closed assembly time,
and the test according to EN 15416-5 is only required with thin glue line;
f) Annex A on storage treatments for tests according to EN 302-1 has been deleted and replaced by
reference to EN 302-1, the storage time for the temperature treatment (A6, A7, A8) has therefore
been reduced from 72 h to 24 h;
g) for bonding of finger-joints in additional wood species, the test according to EN 302-2 may be
replaced by the delamination test on finger-joints from EN 301, which is specified as new Annex A.
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.
Introduction
This document is one of a series dealing with emulsion polymer isocyanate (EPI) adhesives for use with
timber structures, and is published in support of product standards for bonded load-bearing timber
structures in connection with EN 1995-1-1, Eurocode 5: Design of timber structures — Part 1-1:
General — Common rules and rules for buildings.
The series consists of:
— one standard for classification and performance requirements (EN 16254);
— eight test methods (EN 302-1, EN 302-2, EN 302-3, EN 302-4, EN 302-8, EN 15416-1, EN 15416-3
and the test method given in Annex A of this document (“finger-joint delamination test”) used to
assess the performance of adhesives after specified heat and humidity treatments; and
— three test methods (EN 302-7, EN 15416-4 and EN 15416-5) to characterize the working properties
of the adhesive.
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 may have negative environmental
impact. As technological advantages lead to better alternatives for these materials, they will be eliminated
from this European Standard to the extent possible.
At the end of the test, it is recommended that the users of this document take care to carry out an
appropriate disposal of the wastes, according to local regulations.
1 Scope
This document establishes a classification for emulsion polymer isocyanate (EPI) adhesives according to
their suitability for use in load-bearing timber products in defined climatic exposure conditions, and
specifies performance requirements for such a
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