Project Safety



Safe Excavation and Trenching

Excavation cave-ins cause about 75 deaths and 1,000 injuries a year in the US, including about 140 that result in permanent disability.

The Occupational Safety General Regulations are detailed and precise when dealing with excavations and trenches. Section166 states: "(1) Where a person may enter an excavation or trench and a wall of an excavation or trench is greater than 1.2 m in height, an employer shall ensure that the wall is supported by adequate shoring or bracing, or that an adequate trench cage is used, except where the employer is able to establish that the excavation or trench

(a) is cut in sound and stable rock;

(b) is sloped

(i) to within 1.2 m of the bottom of the excavation or trench, or

(ii) where soil overburden is located above an excavation or trench excavated in sound and stable rock, for the entire overburden,

and the slope does not exceed 1 m of vertical rise to each 1 m of horizontal run; or

(c) is one that a person does not enter within a horizontal distance from the walls of the excavation or trench that is equal to the height of the walls."

This course will cover all legislative requirements and is a must for anyone working in or around trenches and excavations. Highlights include: causes of cave ins, protection against cave ins, hazards and safeguards and emergency procedures.