Glazing is considered a hazardous location where the bottom exposed edge of the glazing is less than what height in inches above the plane of the adjacent walking surface of stairways?

Glazing is classified as a hazardous location when it is installed in areas where there is a potential risk of human impact, particularly in pedestrian traffic zones. According to building codes and safety standards, if the bottom exposed edge of the glazing is less than 60 inches above the adjacent walking surface on stairways, it poses a significant risk for injury. This rule is designed to ensure that individuals using the stairway have enough clearance to prevent accidental contact with the glass.

In stairways, lower glazing heights can lead to various hazards, including head injuries in case of a fall or if someone inadvertently collides with the glass. The requirement that the bottom exposed edge must be at least 60 inches above the stairway surface aims to enhance safety by minimizing the likelihood of these incidents. Additionally, this height requirement is sometimes codified in building regulations to provide a standardized measure for safety across different structures.

The other height options would not adequately address the potential hazard as effectively, leading to the conclusion that the correct answer is 60 inches for maximizing safety in these situations.