AS 3818.4-2000

1 - AS 3818.4-2000 TIMBER-HEAVY STRUCTURAL PRODUCTS-VISUALLY GRADED - CROSS-ARMS FOR OVERHEAD LINES
4 - PREFACE
5 - CONTENTS
6 - 1 SCOPE
6 - 2 APPLICATION
6 - 3 PURPOSE AND CONTEXT OF USE
6 - 3.1 Function
6 - 3.2 Action
6 - 4 REFERENCED DOCUMENTS
7 - 5 DEFINITIONS
7 - 6 PERFORMANCE REQUIREMENTS
7 - 7 DESIGN
7 - 8 TIMBER SPECIES
7 - 8.1 General
7 - 8.2 Ordering
8 - 9 DIMENSIONS, SIZES, TOLERANCES AND SQUARENESS
8 - 10 CROSS-ARMS - GRADE DESCRIPTIONS
8 - 10.1 General
8 - 10.2 Grade 1 Cross-arms - Grade description
9 - 10.3 Grade 2 Cross-arms - Grade description
10 - 10.4 Optional top surface grade
12 - Appendix A - GUIDANCE FOR PURCHASERS
12 - A1 INFORMATION THAT SHOULD BE INCLUDED IN PURCHASING ORDERS
12 - A2 STORAGE AND MAINTENANCE
13 - Appendix B - DESIGN PROPERTIES
14 - Appendix C - LIST OF ACCEPTABLE SPECIES AND PROPERTIES

Sets out visual grading rules, dimensional tolerances and acceptable species for timber crossarms intended for use as support for overhead utility service cables. Two grades of crossarms are described and an optional top surface grade is also given. F-grades are given for use in the structural design of crossarms. This Standard is to be used in conjunction with AS 3818.1.

This Standard sets out the minimum requirements for visual grading of cross-arms intended for use in supporting overhead utility services.NOTE: Purchasing guidelines are given in Appendix A.

First published as AS 07-1937.
Revised and redesignated in part as AS 020-1938.
Second edition 1948.
AS 061 first published 1955.
AS 020-1948 and AS 061-1955 revised, amalgamated and redesignated as AS 3818.4-2000.