Florida Building Code Occupancy Classifications

The Florida Building Code (FBC-B) uses nine occupancy groups: Assembly (A-1 through A-5), Business (B), Educational (E), Factory and Industrial (F-1 and F-2), High Hazard (H-1 through H-5), Institutional (I-1 through I-4), Mercantile (M), Residential (R-1 through R-4), and Storage (S-1 and S-2). Each group has specific requirements for fire protection, egress, and structural design.

Assembly occupancies are used for gathering of persons for civic, social, or religious functions, recreation, food or drink consumption, or awaiting transportation. The sub-classifications are: A-1 (performing arts), A-2 (food and drink), A-3 (worship, recreation, amusement), A-4 (indoor sporting events), and A-5 (outdoor activities). Assembly occupancies have the most stringent egress requirements of any occupancy group.

Buildings with multiple occupancy classifications can be designed as separated occupancies (with fire-rated construction between occupancies) or non-separated occupancies (with the most restrictive requirements of all occupancies applied throughout). Pineland Engineering evaluates mixed occupancy requirements for each project and advises on the most cost-effective compliance approach.