What is the purpose of clear width requirements in exit stair construction?

The purpose of clear width requirements in exit stair construction is to ensure safe egress during emergencies. In situations such as fire evacuations or other emergencies, it is critical that individuals can exit a building quickly and safely. Clear width requirements specify the minimum unobstructed width of stairways to facilitate the movement of people. This is particularly important in preventing bottlenecks and ensuring that all occupants can evacuate efficiently and without delays.

In emergencies, every second counts, and the stairways must accommodate the maximum number of people moving in one direction—away from danger. Therefore, adherence to these clear width specifications is a vital safety measure designed to protect lives and enhance the overall effectiveness of an emergency evacuation plan.