In a building that contains more than one primary occupancy, how are the occupancies classified?

• A. Each is individually classified by its primary occupancy
• B. All occupancies are classified as one occupancy
• C. Based on the largest occupancy
• D. Not typically classified

Answer: (A)

When a building has more than one primary occupancy, each area is treated separately and classified by its own primary occupancy. This matters because different occupancies bring distinct fire hazards, occupant loads, and life-safety needs, so the code assigns tailored requirements for egress, fire protection, and construction to each space. Classifying areas individually ensures the protections match how each part of the building is actually used. If everything were lumped into one occupancy, the needs of more hazardous areas could drive the entire building’s requirements, or the unique risks of smaller spaces might be overlooked. It isn’t appropriate to classify all as one occupancy, and relying on the largest occupancy would misstate protections for other areas.