OSHA 30 Hour Construction Program Practice Test

The minimum distance for establishing a Controlled Access Zone (CAZ) from an unprotected edge is specifically set to ensure worker safety by providing a buffer zone where only authorized personnel are permitted. This is crucial in preventing accidental falls and ensuring that only trained individuals are exposed to potential hazards at the edge.

In the context of the choice provided, the correct answer indicates that a CAZ must be a minimum of 6 to 25 feet from the unprotected edge. This distance is determined based on the potential for hazards and is sufficient to create a safe working environment while allowing flexibility for different construction site layouts and activities. By establishing this minimum distance, OSHA aims to minimize risks associated with falls and to ensure that safety measures are consistent and effective across various situations in the construction industry.