What is a critical feature for high-rise stairwells?

A critical feature for high-rise stairwells is the pressurization system designed to prevent smoke infiltration. During a fire, smoke can quickly fill stairwells, creating hazardous conditions for occupants trying to escape. Pressurized stairwells utilize a system that maintains a higher air pressure relative to adjacent areas, effectively keeping smoke from entering the stairwell. This ensures that the stairwell remains a safe egress route during emergencies, allowing occupants to evacuate more safely and efficiently.

The other options do not address the primary safety concern of smoke infiltration. Wide steps for comfort might improve user experience, but they do not enhance safety in an emergency situation. The installation of escalators, while it could facilitate ease of movement, does not align with the safety requirements expected in a high-rise structure, especially during emergencies where rapid evacuation is necessary. Emergency lighting is important for visibility but does not prevent smoke from entering the stairwell; thus, it cannot replace the critical function of pressurizing the space to keep it safe and clear during a fire scenario.