The primary purpose of the occupancy classification system developed by the model code organizations is to categorize occupancies by what basis?

• A. Use or function of the space
• B. Building height
• C. Number of occupants
• D. Access restrictions

Answer: (A)

Occupancy classification is determined by the use or function of the space. The safety rules and requirements in model codes are designed around what people are doing in a space because that use drives the potential hazards, fire spread patterns, and the needed life-safety measures. For example, a classroom and a theater may be similar in size, but their uses create very different egress needs, fire protection requirements, and occupant loads. While height, number of people, or access controls influence the specifics within a category, they don’t define the category itself. That’s why the primary basis is use or function of the space.