ISO/TR 20152-3:2013

TECHNICAL ISO/TR
REPORT 20152-3
First edition
2013-05-01
Timber structures — Bond
performance of adhesives —
Part 3:
Use of alternative species for bond tests
Structures en bois — Performance d’adhérence des adhésifs —
Partie 3: Usage des essences alternatives pour les essais de joints de
collage
Reference number
©
ISO 2013
© ISO 2013
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ii © ISO 2013 – All rights reserved

Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2, www.iso.org/directives.
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constitute an endorsement.
The committee responsible for this document is ISO/TC 165, Timber structures.
ISO 20152 consists of the following parts, under the general title Timber structures — Bond performance
of adhesives:
— Part 1: Basic requirements
— Part 2: Additional requirements
— Part 3: Use of alternative species for bond tests [Technical Report]
Introduction
This Technical Report was prepared to simplify the assessment of adhesive bonds in countries where the
test species described in ISO 20152-1 and ISO 20152-2 may be difficult to obtain. It sets out procedures
for selecting substitute species available locally.
iv © ISO 2013 – All rights reserved

TECHNICAL REPORT ISO/TR 20152-3:2013(E)
Timber structures — Bond performance of adhesives —
Part 3:
Use of alternative species for bond tests
1 Scope
This Technical Report describes the procedures necessary for the recognition of new wood species by
ISO 20152-1 and ISO 20152-2 for the evaluation of structural wood adhesives.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
ISO 20152-1:2010, Timber structures — Bond performance of adhesives — Part 1: Basic requirements
ISO 20152-2, Timber structures — Bond performance of adhesives — Part 2: Additional requirements
3 Test protocols
ISO 20152-1 permits adhesives to be evaluated under what are described as Method A and Method B
procedures. ISO 20152-2 does not make this distinction but the alternative species introduced may also
be used when applying its procedures.
3.1 Using Method A
The provisions contained in this Technical Report apply only to Method A as defined in ISO 20152-1.
3.2 Using Method B
When using Method B procedures, beech is the only substrate permitted. No provisions are available
that permit new species to be introduced into the Method B procedures in ISO 20152-1.
4 Requirements
4.1 Selection of wood species
The proposing body should identify one only of each of the most commonly used softwood and hardwood
species used by their local timber industry for adhesively bonded engineered wood products and
produce evidence that this is the case. The species will not necessarily be the most difficult to adhesively
bond since other qualification procedures are specified in product standards that require further trials
intended to establish that unusual species can be effectively adhesive
...