How many occupancy groups are defined in the IBC?

The International Building Code (IBC) identifies a total of 10 distinct occupancy groups. These groups categorize buildings based on their use and the associated life safety requirements, which is vital for ensuring that structures meet the necessary standards for safety, health, and welfare of the occupants.

The main categories of occupancy groups include assembly, business, educational, factory and industrial, high hazard, institutional, mercantile, residential, storage, and utility and miscellaneous. Each group is further subdivided into subcategories to address various specific uses, which help in determining design, construction, and safety considerations. Understanding these occupancy groups is crucial for architects, builders, and code officials since it influences building design, egress requirements, and fire protection measures.