Indiana Building Code Occupancy Classifications

Structures or portions of structures shall be classified with respect to occupancy in one or more of the groups listed below. A room or space that is intended to be occupied at different times for different purposes shall comply with all of the requirements that are applicable to each of the purposes for which the room or space will be occupied. Structures with multiple occupancies or uses shall comply with Section 508. Where a structure is proposed for a purpose that is not specifically provided for in this code, such structure shall be classified in the group that the occupancy most nearly resembles, according to the fire safety and relative hazard involved.
  1. Assembly (see Section 303): Groups A-1, A-2, A-3, A-4 and A-5
  2. Business (see Section 304): Group B
  3. Educational (see Section 305): Group E
  4. Factory and Industrial (see Section 306): Groups F-1 and F-2
  5. High Hazard (see Section 307): Groups H-1, H-2, H-3, H-4 and H-5
  6. Institutional (see Section 308): Groups I-1, I-2, I-3 and I-4
  7. Mercantile (see Section 309): Group M
  8. Residential (see Section 310): Groups R-1, R-2, R-3 and R-4
  9. Storage (see Section 311): Groups S-1 and S-2
  10. Utility and Miscellaneous (see Section 312): Group U