OHS Code Explanation Guide

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

Section 63 Load charts

Subsection 63(1)

Load charts list a crane’s rated capacity at various boom lengths and incline angles (see Figure 6.7). Since these are the maximum loads that the crane can safely lift, these values must never be exceeded. The values found on crane load charts are referred to as gross capacities, rated capacities or rated loads. These values apply to a crane kept in “as new” condition and set up in accordance with the manufacturer’s specifications.

To determine the maximum load a crane can safety lift, i.e. net capacity, the weight of all auxiliary devices such as jibs, rigging (including the hook, slings, shackles, spreader bars, etc.), load blocks and ball must be deducted from the rated capacity.

Figure 6.7 An example of a load chart