A guardrail system is a barrier erected to prevent employees from falling to lower levels.

• A. Harness
• B. Guardrail
• C. Net
• D. Debris shield

Answer: (B)

A guardrail acts as a fixed barrier placed at edges and around openings to stop a person from stepping or falling off to a lower level. It creates a clear boundary that prevents access to the fall hazard, which is exactly what the statement describes.

A harness is worn on the body to arrest a fall or provide protection when moving at height, but it doesn’t block access to the edge by itself. A net is designed to catch someone after a fall, not to prevent reaching the edge. A debris shield protects workers from falling objects, not from falling themselves.

So the guardrail is the best fit because its purpose is to prevent falls by creating a physical barrier.