OHS Code Explanation Guide

Published Date: July 01, 2009
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Part 23 Scaffolds and Temporary Work Platforms

Section 341 Suspended scaffolds

A suspended scaffold is a scaffold supported from above by wires or ropes. This type of scaffold is used for work on, or providing access to, vertical sides of structures on a temporary basis. Figure 23.16 shows an example of an interior hung suspended scaffold.

Figure 23.16 Example of an interior hung suspended scaffold

The upper end of the suspended scaffold’s suspension rope must be terminated in a spliced loop as shown in Figure 23.17(a). The clamped wire rope arrangement shown in Figure 23.17(b) is unacceptable because the connection may loosen and slip if not properly maintained.

Figure 23.17 Suspension rope terminations

Suspension ropes must be prevented from separating from the shackles to which they are attached. A securing nut must be used as shown in Figure 23.18.

Figure 23.18 Suspension rope securement to thrustout shackle

Because the safety and stability of the working platform relies on the thrustouts from which it is suspended, the thrustouts must be securely anchored to the building or structure from which the platform is suspended. Counterweights cannot be used as the method of anchoring or stabilizing a thrustout. Figure 23.19 shows two types of properly secured thrustouts.

Figure 23.19(a) Examples of thrustout correctly tied back to wall

Figure 23.19(b) Example of thrustout on rotating centre

As shown in Figure 23.20, stop bolts must be installed at the outer ends of thrustouts to prevent shackles from slipping off the thrustouts.

Figure 23.20 Stop bolts at end of thrustout

Readers are referred to section 349 of this Explanation Guide for a discussion of the term “commercially manufactured’.