Wood — Sampling methods and general requirements for physical and mechanical testing of small clear wood specimens

This document specifies methods for the extensive and limited sampling of wood, conditioning and preparation of test pieces. It also specifies the general requirements for physical and mechanical testing of small clear wood specimens. The sampling guidance provided in this document can be applied for timber taken from either trees, logs, or pieces of ungraded/graded/presorted sawn timber for non-structural applications, such as furniture, windows, doors, etc., only.

Bois — Méthodes d'échantillonnage et conditions générales pour les essais physiques et mécaniques de petites éprouvettes de bois net

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Status
Published
Publication Date
01-Dec-2019
Technical Committee
Current Stage
6060 - International Standard published
Start Date
02-Dec-2019
Completion Date
02-Dec-2019
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ISO 3129:2019 - Wood -- Sampling methods and general requirements for physical and mechanical testing of small clear wood specimens
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INTERNATIONAL ISO
STANDARD 3129
Third edition
2019-11
Wood — Sampling methods and
general requirements for physical and
mechanical testing of small clear wood
specimens
Bois — Méthodes d'échantillonnage et conditions générales pour les
essais physiques et mécaniques de petites éprouvettes de bois net
Reference number
ISO 3129:2019(E)
ISO 2019
---------------------- Page: 1 ----------------------
ISO 3129:2019(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2019

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting

on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address

below or ISO’s member body in the country of the requester.
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Published in Switzerland
ii © ISO 2019 – All rights reserved
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ISO 3129:2019(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 General principles ............................................................................................................................................................................................... 1

5 Sampling ........................................................................................................................................................................................................................ 1

5.1 Selection of material........................................................................................................................................................................... 1

5.2 Sampling of wood material........................................................................................................................................................... 1

5.2.1 General...................................................................................................................................................................................... 1

5.2.2 Logs ............................................................................................................................................................................................. 2

5.2.3 Matching for test of dry material ....................................................................................................................... 2

5.2.4 Sawn timber ......................................................................................................................................................................... 2

6 Conditioning of material .............................................................................................................................................................................. 2

6.1 Test pieces with a standardized moisture content (air-dry) ........................................................................... 2

6.2 Test pieces with moisture content of equal to or above fibre saturation point (green) .......... 2

7 Preparation of test pieces ........................................................................................................................................................................... 3

7.1 Form and dimensions ......... ............................................................................................................................................................... 3

7.2 Direction of grain .................................................................................................................................................................................. 3

7.3 Permissible deviations ..................................................................................................................................................................... 4

7.4 Marking ......................................................................................................................................................................................................... 4

7.5 Sample size (number of test pieces) .................................................................................................................................... 4

7.5.1 Random sampling ........................................................................................................................................................... 4

7.5.2 Selective sampling .......................................................................................................................................................... 4

7.5.3 Mechanical sampling .................................................................................................................................................... 5

7.5.4 Minimum number of test pieces ......................................................................................................................... 5

7.6 Conditioning of test pieces ........................................................................................................................................................... 6

7.6.1 Testing at equilibrium moisture content (air-dry condition) ................................................... 6

7.6.2 Testing pieces at or above fibre saturation point (green condition) .................................. 6

7.6.3 Storage ...................................................................................................................................................................................... 6

8 General requirements for physical and mechanical tests ......................................................................................... 6

8.1 Temperature and humidity conditions in the laboratory .................................................................................. 6

8.2 Procedure .................................................................................................................................................................................................... 6

9 Calculation and expression of results ............................................................................................................................................. 6

10 Test report ................................................................................................................................................................................................................... 7

Bibliography ................................................................................................................................................................................................................................ 8

© ISO 2019 – All rights reserved iii
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ISO 3129:2019(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.

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 (see www .iso .org/ directives).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www .iso .org/ patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see www .iso .org/

iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 218, Timber.

This third edition cancels and replaces the second edition (ISO 3129:2012), which has been technically

revised.
The main changes compared to the previous edition are as follows:
— Clause 2 and Bibliography were updated.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2019 – All rights reserved
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INTERNATIONAL STANDARD ISO 3129:2019(E)
Wood — Sampling methods and general requirements
for physical and mechanical testing of small clear wood
specimens
1 Scope

This document specifies methods for the extensive and limited sampling of wood, conditioning and

preparation of test pieces. It also specifies the general requirements for physical and mechanical testing

of small clear wood specimens. The sampling guidance provided in this document can be applied for

timber taken from either trees, logs, or pieces of ungraded/graded/presorted sawn timber for non-

structural applications, such as furniture, windows, doors, etc., only.
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 24294, Timber — Round and sawn timber — Vocabulary
3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 24294 apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
4 General principles

This document covers procedures of sampling for obtaining small clear specimens which, when tested

in accordance with methods specified under relevant International Standards, may provide information

on the influence on mechanical properties of such factors as moisture content, density, position in

cross-section, height in the tree and locality of growth.
5 Sampling
5.1 Selection of material

The material intended for physical and mechanical tests shall be selected taking into account the

purpose of the test, as well as the requirements to ensure that the properties obtained from the test

pieces represent the sample population.
5.2 Sampling of wood material
5.2.1 General
The material selected shall be in the form of either logs or sawn timbers.
© ISO 2019 – All rights reserved 1
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ISO 3129:2019(E)
5.2.2 Logs

Trees or logs shall be selected to represent the population. For each species to be tested, at least five

trees or logs representative of that species or species group shall be selected.
A heart plank shall be cut from a log of acce
...

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