OHS Code Explanation Guide

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

Section 334 Free-standing or rolling scaffolds

Subsection 334(1)

Figure 23.9 shows a typical manually propelled rolling scaffold. To optimize the stability of the scaffold, its maximum height is based on a height to base dimension ratio of 3:1. The height of the scaffold is limited to three times the smallest base dimension. Properly installed outriggers permit the height of the scaffold to be increased by increasing the smallest base dimension.

Figure 23.9 Typical manually propelled rolling scaffold

In some cases, rolling scaffolds are installed on a vehicle. When this is the case, component parts of the scaffold may loosen over time due to vibration. As a result, the scaffold should be checked regularly to make sure that all parts are securely fastened together and the scaffold is securely attached to the vehicle. When outriggers are used on such vehicle-mounted scaffolds, the outriggers must be securely attached to the frame of the vehicle.

To prevent the scaffold from rolling while workers work from the scaffold, locking wheels must be locked and non-locking wheels must be blocked.

Subsection 334(2)

This subsection permits a worker to remain on a rolling scaffold when it is in motion but attaches conditions to the height of the scaffold and the surfaces over which the scaffold travels. A “level” surface is considered “level” if it varies no more than 3 degrees from horizontal. Hazards that may cause a scaffold to tip include pits, holes, depressions or obstructions.

Subsection 334(3)

This subsection makes the worker responsible for locking or blocking the wheels of a rolling scaffold under specified conditions.