What is a safety perimeter?

• A. A physical boundary to prevent access to rigging lines in motion.
• B. A physical device attached to energy sources that prevents re-energizing until removal.
• C. A sensor that stops movement at a preset position.
• D. A designated boundary to keep people away from hazards such as rigging lines in motion.

Answer: (D)

A safety perimeter is a designated boundary that creates a safe zone around hazards to keep people out of the danger area. In theatre, this often means surrounding overhead rigging and moving scenery so that crew and others don’t enter the space while gear is in motion. It’s usually marked with barriers, tape, signage, and sometimes trained staff or posted procedures, with access controlled to authorized personnel. It’s about preventing exposure to hazards, not about stopping equipment or energizing/de-energizing it. This is why the best description is a boundary that keeps people away from hazards such as rigging lines in motion.