OHS Code

Published Date: July 01, 2009
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Part 32 Excavating and Tunnelling

Section 456 Temporary protective structures

(1) An employer must ensure that temporary protective structures in an excavation

(a) 3 metres or less deep are of sufficient strength to prevent the walls of the excavation from caving in or otherwise moving into the excavation, and

(b) more than 3 metres deep are designed, constructed and installed in accordance with the specifications of a professional engineer.

(2) The specifications of a professional engineer for subsection (1)(b) must include

(a) the size and specifications of the structure, including the type and grade of materials used in its construction, and

(b) the loads for which the structure is designed.

(3) An employer must ensure that, before beginning an excavation, a foundation that may be affected by the excavation is supported by a temporary protective structure designed, constructed and installed in accordance with the specifications of a professional engineer.