冷弯钢结构

Cold-formed steel structures

Australian/New Zealand Standard^®

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AS/NZS 4600:1996

This Joint Australian/New Zealand Standard was prepared by Joint Technical Committee BD/82, Cold-formed Steel Structures. It was approved on behalf of the Council of Standards Australia on 4 October 1996 and on behalf of the Council of Standards New Zealand on 4 October 1996. It was published on 5 December 1996.

The following interests are represented on Committee BD/82:

• Association of Consulting Engineers, Australia
• Australian Chamber of Commerce and Industry
• Australian Institute of Steel Construction
• Bureau of Steel Manufacturers of Australia
• CSIRO, Division of Building, Construction and Engineering, Australia
• Heavy Engineering Research Association, New Zealand
• Institution of Professional Engineers of New Zealand
• Metal Building Products Manufacturers Association, Australia
• Metal Roofing and Cladding Manufacturers Association, New Zealand
• Metal Trades Industry Association of Australia
• University of Queensland, Australia
• University of Sydney, Australia
• Welding Technology Institute of Australia

Review of Standards. To keep abreast of progress in industry, Joint Australian/New Zealand Standards are subject to periodic review and are kept up to date by the issue of amendments or new editions as necessary. It is important therefore that Standards users ensure that they are in possession of the latest edition, and any amendments thereto.

Full details of all Joint Standards and related publications will be found in the Standards Australia and Standards New Zealand Catalogue of Publications; this information is supplemented each month by the magazines ‘The Australian Standard’ and ‘Standards New Zealand’, which subscribing members receive, and which give details of new publications, new editions and amendments, and of withdrawn Standards.

Suggestions for improvements to Joint Standards, addressed to the head office of either Standards Australia or Standards New Zealand, are welcomed. Notification of any inaccuracy or ambiguity found in a Joint Australian/New Zealand Standard should be made without delay in order that the matter may be investigated and appropriate action taken.

This Standard was issued in draft form for comment as DR 95246.

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AS/NZS 4600:1996

Australian/New Zealand Standard^®

Cold-formed steel structures

PUBLISHED JOINTLY BY:

STANDARDS AUSTRALIA
1 The Crescent,
Homebush NSW 2140 Australia

STANDARDS NEW ZEALAND
Level 10, Radio New Zealand House,
155 The Terrace,
Wellington 6001 New Zealand

ISBN 0 7337 0795 5

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PREFACE

This Standard was prepared by the Joint Standards Australia/Standards New Zealand Committee BD/82 on Cold-formed Steel Structures to supersede AS 1538—1988, Cold-formed Steel Structures Code.

The objective of this Standard is to provide designers of cold-formed steel structures with specifications for cold-formed steel structural members used for load-carrying purposes in buildings and other structures.

This edition incorporates the following major changes to the previous edition:

(a) The Standard is now in a limit states format.

(b) The use of cold-formed carbon or low-alloy steel sheet, strip, plate or bar not more than 25 mm in thickness is included.

(c) Ductility, the design for earthquake, stiffened and unstiffened elements with stress gradient, partial edge and intermediate stiffeners, design of members subject to tension, beams and columns with one flange through-fastened to deck or sheeting, the use of a reduction factor for the design of purlins, distortional buckling, design of concentrically loaded compression members, combined axial tensile load and bending, cylindrical tubular members, screw fasteners, and testing allowing for variability of the structural units and testing provisions for single-point fasteners, are included.

Sections 1, 2, 3, 4 and 5 of this Standard are mainly based on the 1996 edition of the American Iron and Steel Institute Load and Resistance Factor Design Specification for Cold-Formed Steel Structural Members.

A statement expressed in mandatory terms in a note to a table is deemed to be a requirement 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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Care should be taken to ensure that material used is from the current edition of the Standard and that it is updated whenever the Standard is amended or revised. The number and date of the Standard should therefore be clearly identified.

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CONTENTS

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Page

SECTION 6 TESTING

6.1 TESTING FOR DETERMINING MATERIAL PROPERTIES 93

6.2 TESTING FOR ASSESSMENT OR VERIFICATION 94

APPENDICES

A LIST OF REFERENCED DOCUMENTS 97

B FLEXURAL MEMBERS SUBJECTED TO POSITIVE AND NEGATIVE BENDING 99

C PROTECTION 100

D DISTORTIONAL BUCKLING STRESSES OF GENERAL CHANNELS, LIPPED CHANNELS AND Z-SECTIONS IN COMPRESSION AND BENDING 102

E SECTION PROPERTIES 106

F UNSTIFFENED ELEMENTS WITH STRESS GRADIENT 110

G STANDARD TESTS FOR SINGLE-POINT FASTENER CONNECTIONS 111

Originated in Australia as AS 1538—1974.

Previous edition AS 1538—1988.

Jointly revised and designated AS/NZS 4600:1996.

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