What must trenches have according to safe work practices?

• A. Protective systems in place and trenches inspected
• B. No special precautions needed
• C. A coffee break schedule
• D. Only posted hazard signs

Answer: (A)

Trench safety hinges on having a protective system in place and an ongoing inspection process. The protective system is the layout or devices that prevent a trench from collapsing and protect workers inside. Depending on conditions, this can involve sloping the trench walls, using shoring to shore up the sides, or installing shielding to protect workers from a collapse. Before anyone enters the trench, a competent person must inspect it to confirm that the protective system is properly installed, remains stable, and that there are no hazards such as water accumulation, soil movement, or equipment that could compromise stability. This inspection should happen before each shift and after events that could affect safety, like heavy rain or vibrations. Without both a protective system and a thorough inspection, workers are at serious risk of cave-ins, engulfment, and related injuries. Posting signs or taking a coffee break schedule does not address the actual risk and does not provide the necessary protection.