What safety practice is essential when working in an open trench?

• A. Wearing a hard hat only
• B. Trench protection with shoring, shielding, or sloping to prevent collapse.
• C. Painting trench walls
• D. No ventilation needed

Answer: (B)

When working in an open trench, the primary safety concern is preventing a cave-in that could trap or injure workers. The essential practice is to install a protective system—shoring, shielding, or properly sloping the trench walls—to keep the sides from collapsing. This directly addresses the danger by providing physical support or reducing earth pressure, which is what stops a trench from burying workers if the soil shifts.

Wearing a hard hat helps protect the head, but it does not stop a trench from failing or collapse. Painting the trench walls has no impact on stability, and while ventilation is important in confined spaces with hazardous atmospheres, it isn’t the main measure for preventing trench collapse. The protective system is the core safeguard in open-trench operations.