住宅木结构建筑 第2部分：非气旋区

AS 1684.2—2006 Residential timber-framed construction (Incorporating Amendment No. 1)

PART 2 NON-CYCLONIC AREAS

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Foreword

This Australian Standard® was prepared by Committee TM-002, Timber Framing. It was approved on behalf of the Council of Standards Australia on 9 November 2005. This Standard was published on 31 January 2006.

The following are represented on Committee TM-002:

• A3P
• Association of Consulting Engineers, Australia
• Australian Building Codes Board
• Building Research Association of New Zealand
• CSIRO Manufacturing and Infrastructures Technology
• Engineered Wood Products Association of Australasia
• Engineers Australia
• Forest Industries Federation (WA)
• Housing Industry Association
• Master Builders, Australia
• New Zealand Forest Industries Council
• New Zealand Timber Industry Federation
• Scion
• South Australian Housing Trust
• Structural Engineered Timber Manufactures Association, New Zealand
• Timber and Building Materials Association, NSW
• Timber Development Association, NSW
• Timber Development Association of South Australia
• Timber Queensland

This Standard was issued in draft form for comment as DR 04273.

Standards Australia wishes to acknowledge the participation of the expert individuals that contributed to the development of this Standard through their representation on the Committee and through public comment period.

Keeping Standards up-to-date

Australian Standards®are living documents that reflect progress in science, technology and systems. To maintain their currency, all Standards are periodically reviewed, and new editions are published. Between editions, amendments may be issued.

Standards may also be withdrawn. It is important that readers assure themselves they are using a current Standard, which should include any amendments that may have been published since the Standard was published.

Detailed information about Australian Standards, drafts, amendments and new projects can be found by visiting www.standards.org.au

Standards Australia welcomes suggestions for improvements, and encourages readers to notify us immediately of any apparent inaccuracies or ambiguities. Contact us via email at mail@standards.org.au, or write to Standards Australia, GPO Box 476, Sydney, NSW 2001.

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Australian Standard^®

Residential timber-framed construction

Part 2: Non-cyclonic areas

First published as AS 056—1946.

Second edition 1948.

Revised and redesignated as AS CA38—1971.

Revised and redesignated as AS 1684—1975.

Third edition 1992.

Revised and redesignated in part as AS 1684.2—1999.

Second edition 2006.

Reissued incorporating Amendment No. 1 (November 2006).

COPYRIGHT

© Standards Australia

All rights are reserved. No part of this work may be reproduced or copied in any form or by any means, electronic or mechanical, including photocopying, without the written permission of the publisher.

Published by Standards Australia GPO Box 476, Sydney, NSW 2001, Australia

ISBN 0 7337 7094 0

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PREFACE

This Standard was prepared by the Joint Standards Australian/Standards New Zealand Committee TM-002, Timber Framing, to supersede AS 1684.2—1999.

After consultation with stakeholders in both countries, Standards Australia and Standards New Zealand decided to develop this Standard as an Australian Standard rather than an Australian/New Zealand Standard.

This Standard incorporates Amendment No. 1 (November 2006). The changes required by the Amendment are indicated in the text by a marginal bar and amendment number against the clause, note, table, figure, or part thereof affected.

This Standard will be referenced in the Building Code of Australia 2006; thereby superseding AS 1684.3—1999, which will be withdrawn 12 months from the date of publication of this Standard.

The objective of this Standard is to provide the building industry with procedures that can be used to determine building practice, to design or check construction details, and to determine member sizes, and bracing and fixing requirements for timber-framed construction in non-cyclonic areas.

The objective of this revision is to—

(a) address issues and practices that have been raised by some states building industry interests to better reflect their needs and construction practices, and include editorial amendments and some technical changes to correct mistakes and enhance the application of the document; and

(b) improve the ability of building certifiers to assess and approve applications in accordance with deemed to satisfy documents and to provide more economical deemed to satisfy details.

The continued development of timber framing systems and the need to cater for a widening variety of materials and design conditions have led to a total revision of structural framing design. These developments include—

(i) provision for limit state design methods;

(ii) revised/new structural grades for timber;

(iii) provisions catering for open plan living—larger spans, wider openings and bigger rooms, which need more rational approach to bracing design;

(iv) special ‘engineered’ and fabricated timber products;

(v) recognition of a wider range of high wind and cyclonic design; and

(vi) computer-aided design software for member sizes, bracing and tie-down.

The increased scope and application of this Standard to cater for these conditions has also led to the need to perform a more rigorous design check on a wider range of members and construction practices including window sill trimmers and roof bracing.

This Standard is a companion publication to the following:

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Supplements

This Standard provides detailed design, bracing and connection procedures for wind classifications N1 to N4.

Prior to using this Standard, it is necessary to establish the design gust wind speed and wind classification (see Clause 1.4.2).

Alternatively, for wind classifications N1 and N2, AS 1684.4 provides a simpler set of design solutions derived from this Standard. It should be noted that a more economical design may be obtained by following the design procedures given in this Standard.

It should be noted that AS 1684.4 includes additional differences to AS 1684.2 and 1684.3.

The following Supplements form an integral part of, and must be used in conjunction with, this Standard:

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Supplements

Span tables in Supplements for unseasoned hardwood F8 and F11 may be used for unseasoned F8 and F11 softwood as well.

A CD-ROM, which contains the above Supplements, is attached to this Standard.

This Standard does not preclude the use of framing, fastening or bracing methods or materials other than those specified. Alternatives may be used, provided they satisfy the requirements of the Building Code of Australia.

Notes to the text contain information and guidance. They are not an integral part of the Standard.

Statements expressed in mandatory terms in Notes to the Span Tables are deemed to be requirements of this Standard.

The terms ‘normative’ and ‘informative’ have been used in this Standard to define the application of the appendix to which they apply. A ‘normative’ appendix is an integral part of a Standard, whereas an ‘informative’ appendix is only for information and guidance.

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