Which statement best defines a High-Rise Building?

Which statement best defines a High-Rise Building?

• A. A building where the floor of an occupiable story is greater than 75 ft (23 m) above the lowest level of fire department vehicle access.
• B. A building taller than 100 ft with multiple elevator banks.
• C. A building with a mezzanine level that does not exceed the ground floor.
• D. A building with an exterior exit stair only.

Answer: (A)

Definition of a High-Rise Building in NFPA 101 centers on how far the occupiable floors are from the point where fire department vehicles can access the building. If the floor of the highest occupiable story is more than 75 feet above the lowest level of fire department vehicle access, the building is considered a high-rise. This threshold isn’t about overall height or elevator count; it’s about the distance from ground access to the usable floors, which triggers the additional life-safety provisions that high-rise buildings require, such as specialized stair enclosures, elevator recall and smoke control considerations, and enhanced fire service features. The other statements don’t define high-rise because they rely on height alone, the presence of mezzanines, or exterior stairs, none of which establish whether the building meets the 75-foot criterion.

Definition of a High-Rise Building in NFPA 101 centers on how far the occupiable floors are from the point where fire department vehicles can access the building. If the floor of the highest occupiable story is more than 75 feet above the lowest level of fire department vehicle access, the building is considered a high-rise. This threshold isn’t about overall height or elevator count; it’s about the distance from ground access to the usable floors, which triggers the additional life-safety provisions that high-rise buildings require, such as specialized stair enclosures, elevator recall and smoke control considerations, and enhanced fire service features. The other statements don’t define high-rise because they rely on height alone, the presence of mezzanines, or exterior stairs, none of which establish whether the building meets the 75-foot criterion.