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AS/NZS 4787:2001


Timber — Assessment of drying quality

Sets out procedures for specifying and verifying the moisture content of seasoned solid timber. Provides a range of drying quality classes for timber dried in kilns or by other means where the result is a population of timber with a predictable scater of moisture contents. Other drying quality criteria such as checking, collapse and distortion are detailed in an appendix.
Published: 05/05/2001
Pages: 19
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Table of contents
Cited references
Content history
Table of contents
About this publication
1 Scope
2 Application
3 Referenced documents
4 Definitions
5 Specifying drying quality
6 Requirements for seasoned timber
7 Drying quality classification
8 Variation of mean moisture content
9 Sampling and assessment
9.1 General
9.2 Sampling frequency
9.3 Establishing compliance
10 Marking requirements
11 Maintaining dried quality
Appendix A
Appendix B
B1 General
B2 Moisture content gradient
B2.1 General description
B2.2 Measurement of moisture content gradient
B3 Residual drying stress
B3.1 General description
B3.2 Measurement of residual drying stress
B4 Checking
B4.1 General description
B4.2 Measurement of surface checking
B4.3 Measurement of end checking
B4.4 Measurement of internal checking
B5 Collapse
B5.1 General description
B5.2 Measurement of collapse
B6 Distortion
B6.1 General description
B6.2 Measurement of distortion
B7 Discolouration caused by drying
B7.1 General description
B7.2 Measurement of discolouration
Appendix C
Appendix D
Cited references in this standard
Timber — Glossary of terms in timber-related Standards
Timber — Methods of test, Method 1: Moisture content
Content history
AS/NZS 4787:2001 Rec:2016
DR 99087