AS 3818.4-2010

1 - AS 3818.4-2010 TIMBER-HEAVY STRUCTURAL PRODUCTS-VISUALLY GRADED - CROSS-ARMS FOR OVERHEAD LINES
4 - PREFACE
5 - CONTENTS
6 - SECTION 1 SCOPE AND GENERAL
6 - 1.1 SCOPE
6 - 1.2 APPLICATION
6 - 1.3 PURPOSE AND CONTEXT OF USE
6 - 1.3.1 Function
6 - 1.3.2 Action
6 - 1.4 NORMATIVE REFERENCE
7 - 1.5 DEFINITIONS
7 - 1.6 TIMBER SPECIES
7 - 1.6.1 General
7 - 1.6.2 Ordering
7 - 1.7 DESIGN
8 - SECTION 2 PRODUCT REQUIREMENTS
8 - 2.1 GENERAL
8 - 2.2 DIMENSIONS, SIZES, TOLERANCES AND SQUARENESS
8 - 2.3 BOW AND SPRING
8 - 2.4 TWIST
8 - 2.5 COMBINATION OF CHARACTERISTICS
9 - SECTION 3 GRADE 1 CROSS-ARMS
9 - 3.1 GENERAL
9 - 3.2 GRADE REQUIREMENTS
11 - SECTION 4 GRADE 2 CROSS-ARMS
11 - 4.1 GENERAL
11 - 4.2 GRADE REQUIREMENTS
13 - SECTION 5 OPTIONAL TOP SURFACE GRADE
13 - 5.1 GENERAL
13 - 5.2 GRADE REQUIREMENTS
15 - APPENDIX A - PURCHASING GUIDELINES
15 - A1 INFORMATION TO BE INCLUDED IN PURCHASING ORDERS
16 - A2 STORAGE AND MAINTENANCE
17 - APPENDIX B - DESIGN PROPERTIES
18 - BIBLIOGRAPHY

Provides producers and users of timber cross-arms with requirements for the visual grading and selection of species of such timbers intended for use in supporting overhead utility services.

This Standard sets out the minimum requirements for visual grading of cross-arms intended for use in supporting overhead utility services. These minimum requirements apply at the time of grading.NOTES:1 Purchasing guidelines are given in Appendix A.2 Stress grades applicable to strength groups are given in Appendix B

Originated as part of AS O7-1937 and AS O61-1955.
Previous edition AS 3818.4-2003.
Third edition 2010.