Specifies visual grading rules and dimensional tolerances for timber cross-arms intended for use as supports for overhead utility service cables. Two grades of cross-arms are described and an optional top surface grade is also given. F-grades are given for use in the structural design. This Standard is to be used in conjunction with AS 3818.1.
AS 3818.4-2003 History
AS 3818.4-2010
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AS 3818.4-2003
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