How can employees be safeguarded when working at the edge of excavations over six feet deep?

Using guardrail systems, fences, or barricades is essential for safeguarding employees working at the edge of excavations over six feet deep because these physical barriers are designed to prevent falls, which are a significant risk in such situations. Guardrail systems provide a reliable means of protection by creating a boundary that employees cannot easily cross, thereby reducing the likelihood of accidents caused by slips or missteps near the excavation's edge.

While hard hats, safety harnesses, and verbal warnings can contribute to overall safety in the workplace, they do not specifically address the immediate risk of falls at excavation edges. Hard hats protect against falling objects but do not prevent falls into the excavation. Safety harnesses may be useful in certain situations but require proper anchorage and training to be effective. Verbal warnings can serve as reminders, but they are not a substitution for physical barriers that provide consistent and reliable protection. Therefore, the use of guardrail systems, fences, or barricades is the most effective measure to ensure employee safety in this context.