OHS Code

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

Section 450 Methods of protection

(1) Before a worker begins working in an excavation that is more than 1.5 metres deep and closer to the wall or bank than the depth of the excavation, an employer must ensure that the worker is protected from cave ins or sliding or rolling materials by

(a) cutting back the walls of the excavation to reduce the height of the remaining vertical walls, if any, to no more than 1.5 metres for “hard and compact soil” and “likely to crack or crumble soil”,

(b) installing temporary protective structures, or

(c) using a combination of the methods in clauses (a) and (b).

(2) Subsection (1) does not apply if a trench is constructed in solid rock throughout the entire trench.