Trench collapses, or cave-ins, pose the greatest risk to workers' lives. To prevent cave-ins: SLOPE or bench trench walls; SHORE trench walls with supports, or; SHIELD trench walls …

Trench collapses, or cave-ins, pose the greatest risk to workers lives. When done safely, trenching operations can reduce worker exposure to other potential hazards include falls, …

OSHA defines an excavation as any man-made cut, cavity, trench, or depression in the Earth’s surface formed by earth removal. A trench is defined as a narrow excavation (in relation to its …

• SHORE trench walls by installing aluminum hydraulic or other types of supports to prevent soil movement. • SHIELD trench walls by using trench boxes or other

This figure illustrates a trench shield, consisting of a knife edge, sidewall, and struts. The knife edge is at the bottom edge of the sides of the trench shield, and struts are going between both …

Mar 11, 2013 · It is fairly typical to require the gap between the trench shield and trench sides to be no more than 3-6 inches. Alternatively, at least the lower portion of the trench shall be …

Aug 10, 2000 · Specifically, the trench shield extends 18 inches (0.45 m) above the vertical part of the walls, but is below the top of the trench. Therefore, where the top of the shield is below …

Prevent trench collapses and save lives: SLOPE or bench trench walls, SHORE trench walls with supports, or SHIELD trench walls with trench boxes PROTECT WORKERS IN TRENCHES …

Appendix B to Subpart P of Part 1926—Sloping and Benching (a) Scope and application. This appendix contains specifications for sloping and benching when used as methods of protecting …

• Never enter an unprotected trench. • Always use a protective system for trenches 5 feet deep or greater. • Employ a registered professional engineer to design a protective system for …