Which of the following is NOT a requirement for stairways?

Stairways must meet a variety of safety and accessibility standards to ensure they can be safely used by all individuals. The requirement that stairways must have handrails is critical for providing support and preventing falls, particularly on stairs that have a certain number of risers. Non-slip treads are essential for minimizing the risk of slips and falls, making stairways safer. Additionally, a minimum width requirement ensures that stairways can accommodate multiple users safely, reducing congestion and the risk of accidents.

However, the requirement for stairways to be enclosed at all times is not a standard code provision for all types of stairways. Enclosure may be necessary in certain scenarios, such as for fire escape routes or in some commercial buildings where fire-rated assemblies are required, but it is not universally applicable to every stairway. Therefore, stating that stairways must be enclosed at all times is not accurate and distinguishes it from the other essential requirements that promote safety and accessibility.