OHS Code Explanation Guide

Published Date: July 01, 2009
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Part 6 Cranes, Hoists and Lifting Devices

Section 75 A-frames and gin poles

Inclining an A-frame or gin pole at an angle greater than 45 degrees from the vertical can impose unusual forces on components leading to hoist failure.

Figure 6.15(a) Example of A-frame with boom

An A-frame is not typically built with a boom. However, where it is, adequate “boom stops” can be provided by using chains or guy lines.