ISO 18100:2017

INTERNATIONAL ISO
STANDARD 18100
First edition
2017-03
Timber structures — Finger-jointed
timber — Manufacturing and
production requirements
Structures en bois — Bois assemblé par entures multiples —
Exigences de fabrication et de production
Reference number
©
ISO 2017
© ISO 2017, Published in Switzerland
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ii © ISO 2017 – All rights reserved

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols . 2
5 Conformance . 3
5.1 Quality systems requirements . 3
5.2 Manufacturing specifications . 3
6 Requirements . 3
6.1 Structural strength . 3
6.1.1 Timber components . 3
6.1.2 Grading methods. 3
6.1.3 Finger-jointed timber . 3
6.2 Adhesive . 4
6.3 Finger joint glue bond integrity . 4
6.4 Utility . 4
6.5 Product identification . 4
7 Verification . 4
7.1 Structural strength . 4
7.1.1 Qualification . 4
7.1.2 Compliance testing . 5
7.2 Adhesive . 5
7.3 Finger-joint glue bond integrity . 6
7.3.1 Verification at qualification . 6
7.3.2 Verification for compliance testing . 6
7.4 Utility requirements . 6
7.5 Product identification requirements . 6
Annex A (normative) Compliance (factory production control) testing — Strength
verification of finger-jointed timber. 7
Annex B (normative) Verification of the strength of finger-jointed timber by double-
bending proof loading . 9
Annex C (normative) Verification of the minimum strength of finger-jointed timber by
tension proof loading.14
Annex D (normative) Verification of finger joint bond quality by assessment of wood
fibre failure .16
Annex E (normative) Verification of finger joint bond quality by cyclic delamination .20
Annex F (normative) Verification of finger joint strength properties using the analytical method 22
Annex G (normative) Product identification .24
Annex H (informative) Basis of factor k .25
fj
Bibliography .26
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
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ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
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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
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URL: w w w . i s o .org/ iso/ foreword .html.
This document was prepared by ISO/TC 165, Timber structures.
iv © ISO 2017 – All rights reserved

Introduction
Finger-jointed timber is viewed as an alternative and substitute for sawn timber. Finger-jointed timber
makes use of timber of various lengths and enables localized defects, particularly knots, to be docked
out of otherwise high-quality sawn timber.
Qualification (initial type testing) and compliance (factory production control) testing are specified
to assess if the components and manufacturing procedures used (finger joint profile, end pressure and
other production variables) are appropriate for the characteristic values being claimed. A representative
sample of the potential production is evaluated for tension and bending strength and finger joints are
assessed for bond quality using delamination or wood fibre failure tests.
INTERNATIONAL STANDARD ISO 18100:2017(E)
Timber structures — Finger-jointed timber —
Manufacturing and production requirements
1 Scope
This document specifies the product and performance requirements for finger-jointed structural
timber made from sawn timber elements.
The document does not cover products made using impressed (die-formed) joints or finger-jointed
laminations for glued laminated timber, which is covered in ISO 12578.
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.
ISO 9709, Structural timber — Visual strength grading — Basic principles
ISO 10983, Timber — Finger joints — Minimum production requirements and testing methods
ISO 12122-2, Timber structures — Determination of characteristic values — Part 2: Sawn timber
ISO 13910, Timber structures — Strength graded timber — Test methods for structural properties
ISO 13912, Structural timber — Machine strength grading — Basic principles
ISO 20152-1, Timber structures — Bond performance of structural adhesives — Basic requirements
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http:// www .electropedia .org/
— ISO Online browsing platform: available at http:// www .iso .org/ obp
3.1
finger joint
end joint formed by machining a number of similar, tapered, symmetrical fingers in the ends of timber
pieces that are then bonded together
3.2
finger-jointed timber
timber that contains two or more component pieces end-joined by finger joints (3.1)
Note 1 to entry: All pieces are of a single species or recognized species group, have the same nominal cross-
section and the finger joints are formed using a common adhesive and production method.
3.3
production batch
finger-jointed timber (3.2) made during a continuous run on one production line
3.4
strength grade
population of timber having a set of structural properties and utility requirements
Note 1 to entry: Strength grade is defined in accordance with principles detailed with ISO 9709 (visual grading)
or ISO 13912 (machine grading).
3.5
service class
service conditions to which finger-jointed timber (3.2) is subjected
Note 1 to entry: Service classes are defined in ISO 20152-1.
3.6
qualification
initial type testing
testing of finger joints (3.1) or finger-jointed timber (3.2) that is used to establish the statistical variables
that describe the finger joint strength applicable to strength grade (3.4) and the parameters appropriate
to the bond quality of the service class (3.5)
3.7
compliance
factory production control testing
process of demonstrating that finger-jointed timber (3.2) has strength values and bond quality of the
specified strength grade (3.4) and servic
...