According to OSHA regulations, how high must a cage on a fixed ladder extend above the base of the ladder?

The correct answer is based on OSHA regulations that mandate a safety cage on a fixed ladder should extend between 7 to 8 feet above the base of the ladder. The primary purpose of this regulation is to provide a safeguard for workers ascending or descending the ladder, reducing the risk of falling. A safety cage helps catch a worker in the event of a slip, providing an extra layer of protection in high-risk environments.

This regulation reflects a safety-oriented approach, ensuring the design of fixed ladders incorporates features that accommodate the practical needs of workers while promoting their safety. By having the cage extend to this specified height, workers are more secure and have better protection from potential hazards associated with climbing fixed ladders.

Other height measurements do not align with OSHA's specific requirements, thus reinforcing why the chosen option is the correct standard.