OHS Code Explanation Guide

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

Section 92 Preventing damage

“Positive boom stops” are devices that prevent the boom from toppling or being pulled backwards over the top of the cab. Boom stops physically stop further motion of the boom at a predetermined safe angle.

“Boom stop limit devices” are limit switches that disconnect the drive or stop the engine when the boom reaches a predetermined angle. See Figures 6.24 and 6.25.

Figure 6.24 Example of boom stop

Figure 6.25 Examples of boom stop limit devices