OHS Code

Published Date: July 01, 2009
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Part 21 Rigging

Section 306 Wire rope

(1) An employer must ensure that wire rope is permanently removed from service if

(a) wear or corrosion affects individual wires over more than one third of the original diameter of the rope,

(b) there is evidence that the rope structure is distorted because of bulging, kinking, bird-caging or any other form of damage,

(c) there is evidence of heat or arc damage, or

(d) the normal rope diameter is reduced, from any cause, by more than

(i) 0.4 millimetres if the normal rope diameter is 8 millimetres or less,

(ii) 1 millimetre if the normal rope diameter is more than 8 millimetres and less than 20 millimetres,

(iii) 2 millimetres if the normal rope diameter is 20 millimetres or more and less than 30 millimetres, and

(iv) 3 millimetres if the normal rope diameter is 30 millimetres or more.

(2) An employer must ensure that a running wire rope is permanently removed from service

(a) if 6 or more randomly distributed wires are broken in one rope lay, or

(b) if 3 or more wires are broken in one strand in one rope lay.

(3) An employer must ensure that a stationary wire rope such as a guy line is permanently removed from service

(a) if 3 or more wires are broken in one rope lay in sections between end connections, or

(b) if more than one wire is broken within one rope lay of an end connection.

(4) An employer must ensure that wire rope that does not rotate because of its construction is permanently removed from service

(a) if there is evidence of the damage referred to in subsection (1),

(b) if 2 randomly distributed wires are broken in 6 rope diameters, or

(c) if 4 randomly distributed wires are broken in 30 rope diameters.