When no mechanical equipment is being used, how far from the roof edge should warning lines be erected?

Warning lines are an essential component of fall protection systems, particularly when working near roof edges. The requirement for establishing warning lines is designed to help prevent workers from inadvertently falling from the elevated surface. When no mechanical equipment is being utilized, the Occupational Safety and Health Administration (OSHA) specifies that warning lines must be set up at least 6 feet from the roof edge.

This distance is significant because it provides a buffer zone that alerts workers to the presence of the hazard (the roof edge) while still allowing for sufficient working space. By maintaining this 6-foot separation, it reduces the risk of accidental falls and increases overall safety on the job site. The use of warning lines should be complemented by other safety practices and equipment to ensure a comprehensive approach to fall protection.