OHS Code Explanation Guide

Published Date: July 01, 2009
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Part 21 Rigging

Section 303 Safety latches

Subsection 303(1)

If a hook is used in any circumstances during which dislodgement could injure workers, the hook must be replaced with

(a) a hook with a safety latch (see Figure 21.26),
(b) an anchor-type shackle with a bolt, nut, and retaining pin (see Figure 21.27), or
(c) the hook must be “moused” i.e. a method of covering the throat opening of a hook by wrapping it with soft wire, rope, heavy tape or similar materials.

Figure 21.26 Examples of hooks with safety latches

Figure 21.27 Example of an anchor-type shackle with a bolt, nut and retaining pin

Subsection 303(2)

A safety latch is not required where a hook is used in an application where manipulation of the latch may pose a hazard to a worker. This might be the case, for example, where the load is awkwardly shaped and the only way a worker could release the safety latch is to climb onto the load.

Subsection 303(3)

A safety latch, mousing or shackle is not required if a sorting hook is used to lift components of a skeleton steel structure or during a similar operation (see Figure 21.28).

Figure 21.28 Example of sorting hooks and how it might be used

Subsection 303(4)

Figure 21.29 shows an example of a spring-loaded safety latch. Hoisting operations in a caisson must be foolproof – a load cannot be allowed to drop because of a safety latch that binds. A shackle assembly as described in this subsection must be used.

Figure 21.29 Example of spring-loaded safety latch

Examples of acceptable and unacceptable shackles are shown in Figures 21.30 and 21.31.

Figure 21.30 Examples of an acceptable shackle

Figure 21.31 Examples of unacceptable shackles