Safety Trained Supervisor in Construction (STSC) Practice Exam

How close can temporary spoils be placed from the edge of a trench during trenching operations?

1. 1 foot

2. 2 feet

3. 3 feet

4. 5 feet

The correct answer is: 2 feet

In trenching operations, maintaining safety is of utmost importance, particularly in relation to how close temporary spoils can be placed to the edge of a trench. The correct distance is typically set at 2 feet from the edge of the trench. This distance is vital because it helps ensure that the spoil pile does not impose undue stress on the trench walls, reducing the risk of cave-ins. When spoils are piled too close to the trench, the weight can destabilize the soil around the trench and potentially lead to collapses, which can be hazardous for workers inside the trench. By adhering to the 2-foot guideline, safety measures are supported, promoting a safer work environment. Other potential distances that might be suggested (1 foot, 3 feet, or 5 feet) either do not comply with established safety regulations or may not provide the same level of safety. Too close could result in danger, while too far may not address the practical needs of the excavation site. Thus, maintaining the spoil pile at a minimum of 2 feet away aligns with best practices in safety management during trenching operations.