Which of the following safety measures is crucial when working at heights?

Edge protection is a crucial safety measure when working at heights because it serves as a physical barrier that helps prevent falls. Falls from height are one of the leading causes of serious injuries and fatalities in the construction industry. By installing guardrails, mesh, or scaffolding systems that provide edge protection, workers are safeguarded against slips or accidental movements toward the edge of elevated work surfaces. Proper edge protection is especially important in scenarios where workers are performing tasks near unprotected edges.

While proper lighting, ventilation, and personal protective equipment play important roles in overall site safety and contribute to a safer work environment, they do not directly address the specific risk of falling from heights in the way that edge protection does. Proper lighting ensures visibility, ventilation maintains air quality, and personal protective equipment provides additional safety; however, without effective edge protection, the risk of falls is significantly heightened. Therefore, edge protection is emphatically vital in preventing accidents when working at elevations.