In a high-rise building, the floor of an occupiable story is greater than what height above the lowest level of fire department vehicle access?

In high-rise buildings, a defining feature that determines the classification of the building and influences fire safety regulations is the height of the occupiable floor above the lowest level of fire department vehicle access. When the floor height exceeds 75 feet, the building is generally classified as a high-rise, which necessitates additional safety measures, including fire protection systems and equipment.

The choice of 75 feet is significant because it aligns with established fire safety codes and standards, which specify that buildings above this height require special considerations for firefighting and rescue operations. Fire department vehicles can typically operate effectively up to this height, but going beyond it means that traditional firefighting techniques may be less effective, urging the implementation of more sophisticated systems like standpipe systems, fire alarms, and sprinkler systems to ensure occupant safety and effective fire suppression.

Thus, the correct answer underscores the importance of recognizing this specific height threshold when assessing building safety features and local fire codes, reinforcing the need for adequate fire protection measures in buildings deemed high-rise.