ISO 10983:1999

Timber structures — Solid timber finger-jointing — Production requirements

Structures en bois — Aboutages à entures multiples de bois massif — Exigences de fabrication

General Information

• Status: Withdrawn
• Publication Date: 01-Sep-1999
• Withdrawal Date: 01-Sep-1999
• ICS: 91.080.20 - Timber structures
• Technical Committee: ISO/TC 165 - Timber structures
• Drafting Committee: ISO/TC 165/WG 6 - Glued joints for timber structures
• Current Stage: 9599 - Withdrawal of International Standard
• Completion Date: 22-Apr-2014

Relations

• Revised: ISO 10983:2014 - Timber — Finger joints — Minimum production requirements and testing methods
• Effective Date: 09-Oct-2010

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 10983
First edition
1999-09-01
Timber structures — Solid timber
finger-jointing — Production requirements
Structures en bois — Aboutages à entures multiples de bois massif —
Exigences de fabrication
A
Reference number
ISO 10983:1999(E)

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ISO 10983:1999(E)
Contents
1 Scope .1
2 Normative references .1
3 Terms and definitions .1
4 Symbols.2
5 Requirements.3
5.1 General.3
5.2 Timber.3
5.3 Adhesives.3
5.4 Characteristic strength.3
6 Manufacturing requirements .4
6.1 Production conditions.4
6.2 Timber.4
6.3 Adhesive application.4
6.4 Assembly and end pressure.4
6.5 Preservative and fire retardant treatment .5
7 Quality control.5
7.1 Factory production control.5
7.2 Organization of factory production control .7
7.3 Documentation of the quality control system .8
7.4 Inspection and testing.8
8 Type testing — Initial determination of joint strength .8
8.1 General.8
8.2 Materials .8
©  ISO 1999
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic
or mechanical, including photocopying and microfilm, without permission in writing from the publisher.
International Organization for Standardization
Case postale 56 • CH-1211 Genève 20 • Switzerland
Internet [e-mail]
Printed in Switzerland
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© ISO
ISO 10983:1999(E)
8.3 Preparation of specimens. 9
8.4 Procedure . 9
8.5 Characteristic strength . 9
Annex A (informative) Finger-joint bending strength. 10
Annex B (informative) Finger-joint tension strength. 13
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© ISO
ISO 10983:1999(E)
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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3.
Draft International Standards adopted by the technical committees are circulated to the member bodies for voting.
Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote.
International Standard ISO 10983 was prepared by Technical Committee ISO/TC 165, Timber structures.
Annexes A and B of this International Standard are for information only.
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© ISO
ISO 10983:1999(E)
Introduction
This International Standard is based on European Standard EN 385:1995, Finger-jointed structural timber —
Performance requirements and minimum production requirements, but has been modified for international use. In
particular, the requirements for external control of production by an external independent organization have been
omitted, as this is regarded as the responsibility of national regulatory bodies and not a matter for inclusion in an
International Standard. However, TC 165 is not prepared to recommend the use of finger joints in structural timber
components where the manufacturing process is not described by a works’ quality manual for the following reasons.
a) Structural properties can only be assigned to a finger joint which is clearly defined. Such definition requires a
clear statement, within the works’ quality manual, which details the raw material inputs (wood and adhesive)
and the manufacturing process.
b) Processes which are not written in a works’ quality manual and promulgated to the personnel responsible for
manufacturing the finger joint are unlikely, over lengthy periods of time, to be manufactured consistently.
Other principles built into the development of this International Standard are as follows.
 This International Standard applies only to the finger-joint production and makes reference only to the
maintenance of finger-joint strength. Finger joints are found in both glulam laminations and finger joints and
finger-jointed timber used directly for structural applications. No attempt is made in this International Standard
to relate compliance testing to the properties of either glulam or finger-jointed timber.
 Type testing is undertaken to establish characteristic strengths and thence target strengths for compliance
(daily quality control) testing. The precise test configurations are not specified in this International Standard,
which permits the use of a wide variety test equipment. However, it is a requirement that the same equipment
and configuration used for type testing also be used for compliance testing. Both bend and tension tests are
provided for compliance testing.
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INTERNATIONAL STANDARD  © ISO ISO 10983:1999(E)
Timber structures — Solid timber finger-jointing — Production
requirements
1 Scope
This International Standard specifies requirements for bonded finger joints and minimum requirements for the
manufacture of cut, interlocking, bonded finger joints in structural timber members.
Although most finger joints are produced in coniferous species, this International Standard also applies to broad-
leaved species where information is available to enable them to be satisfactorily bonded.
It does not cover impressed (die-formed) joints. In the case of glued laminated timber it applies only to individual
laminations. Large finger joints in glued laminated timber are not covered by this International Standard.
2 Normative reference
The following normative document contains provisions which, through reference in this text, constitute provisions of
this International Standard. For dated references, subsequent amendments to, or revisions of, this publication do
not apply. However, parties to agreements based on this International Standard are encouraged to investigate the
possibility of applying the most recent edition of the normative document indicated below. For undated references,
the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of
currently valid International Standards.
EN 301, Adhesives for load bearing timber structures — Phenolic and amino-plastic — Classification and
performance requirements.
3 Terms and definitions
For the purposes of this International Standard, the following terms and definitions apply.
3.1
finger joint
self-locating end joint formed by machining a number of similar, tapered, symmetrical fingers in the ends of timber
members which are then bonded together
See Figure 1.
Figure 1 — Typical profile of finger joint showing finger length l, pitch p, tip width b , and tip gap l
t t
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© ISO
ISO 10983:1999(E)
3.2
finger length
distance between the finger base and the tip of the finger, measured along the centreline of the finger
3.3
pitch
centre-to-centre distance between fingers
3.4
production batch
joints, all of which have the same profile, are manufactured from the same species of timber, have the same
nominal cross-section, are bonded with the same adhesive and are made during a continuous run on one
production line
3.5
service class 1
service class characterized by a moisture content of the material corresponding to a temperature of 20 °C and a
relative humidity of the surrounding air exceeding 65 % only for a few weeks per year
NOTE In service class 1, the average equilibrium moisture content in most timbers does not exceed 12 %.
3.6
service class 2
service class characterized by a moisture content of the material corresponding to a temperature of 20 °C and a
relative humidity of the surrounding air exceeding 85 % only for a few weeks per year
NOTE In service class 2, the average equilibrium moisture content in most timbers does not exceed 20 %.
3.7
service class 3
service class characterized by climatic conditions leading to higher moisture contents than service class 2
3.8
tip gap
distance between finger tip and slot base in a bonded finger joint
3.9
tip width
distance between finger faces, measured at the tip of the finger
4 Symbols
b width of cross-section, in millimetres
b tip width, in millimetres
t
f finger-joint bending strength, in megapascals
m
f finger-joint characteristic bending strength, in megapascals
m,k
th
f 5 percentile finger-joint bending strength of last 15 specimens tested, in megapascals
m,15
f finger-joint bending strength declared by the manufacturer, in megapascals
m,dc,k
f target finger-joint bending strength to be met in compliance testing, in megapascals
m,target
f finger-joint tension strength, in megapascals
t
f finger-joint characteristic tension strength, in megapascals
t,k
th
f 5 percentile finger-joint tension strength of last 15 specimens tested, in megapascals
t,15
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© ISO
ISO 10983:1999(E)
finger-joint tension strength declared by the manufacturer, in megapascals
f
t,dc,k
f target finger-joint tension strength to be met in compliance testing, in megapascals
t,target
h depth of cross-section, in millimetres
k statistical factor, see 7.1.4
15
l finger length, in millimetres
l tip gap, in millimetres
t
m mean value
p pitch, in millimetres
s standard deviation
5 Requirements
5.1 General
The cutting and the bonding operations of finger joints shall result in reliable and durable bonds of the required
strength.
These general requirements shall be considered satisfied if both the requirements in this clause and the minimum
production requirements in clause 6 are fulfilled.
5.2 Timber
5.2.1 Species
Sufficient information on the timber species shall be available to enable the timber to be satisfactorily bonded.
5.2.2 Growth and processing characteristics
The incidence of growth and processing characteristics such as knots, fissures, grain disturbance, wane and
damage in the timber shall not exceed the limits described in the work’s quality manual.
5.3 Adhesives
The adhesive shall enable joints of such strength and durability to be produced such that the integrity of the bond is
maintained throughout the intended lifetime of the structure.
For structures in service class 3, the adhesive used shall be of type I and shall meet the requirements for this type
given in EN 301. For structures in service class 1 or 2, an adhesive of type II in accordance with EN 301 can be
used, provided the temperature of the member in the structure remains below 50 °C.
NOTE 1 The adhesive should be chosen considering the climatic conditions in service, the timber species, the preservative
used (if any) and the production methods.
NOTE 2 Such strength and durability can be achieved by a polycondensation adhesive of the phenolic or aminoplastic type
as defined in EN 301.
5.4 Characteristic strength
5.4.1 General
The characteristic strength in bending or tension shall be determined by type testing in accordance with clause 8.
The method of compliance testing (bending or tension) shall be at the discretion of the manufacturer.
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© ISO
ISO 10983:1999(E)
5.4.2 Characteristic strength in bending
Where bend testing is used for compliance testing, the characteristic bending strength of the finger joints, f , shall
m,k
be determined by type testing and statistical analysis as described in 8.5. The declared characteristic bending
strength shall meet the requirement:
f < f
m,dc,k m,k
A manufacturer may declare a characteristic bending strength lower than f .
m,k
5.4.3 Characteristic strength in tension
Where tension testing is used for compliance testing, the characteristic tension strength of the finger joints, f , shall
t,k
be determined by type testing and statistical analysis as described in 8.5. The declared characteristic tension
strength shall meet the requirement:
f < f
t,dc,k t,k
A manufacturer may declare a characteristic tension strength lower than f .
t,k
6 Manufacturing requirements
6.1 Production conditions
The premises shall meet the requirements of air temperature and relative humidity to ensure a satisfactory
production environment. Necessary machinery and equipment for the production process shall be available.
6.2 Timber
The moisture content shall be measured either by the oven-drying method or by the use of a regularly calibrated
moisture meter.
At assembly, the timber at t
...