R-3 Residential occupancies where the occupants are primarily permanent in nature and not classified as Group R-1, R-2, R-2.1, R-4 or I, including: Buildings that do not contain more than two dwelling units. Adult care facilities that provide accommodations for six or fewer clients of any age for less than 24 hours.

303.1Assembly Group A. Assembly Group A occupancy includes, among others, the use of a building or structure, or a portion thereof, for the gathering of persons for purposes such as civic, social or religious functions; recreation, food or drink consumption or awaiting transportation.

Group A-2 occupancy includes assembly uses intended for food and/or drink consumption including, but not limited to: Banquet halls; Casinos (gaming areas); Nightclubs; Restaurants, cafeterias and similar dining facilities (including associated commercial kitchens); Taverns and bars.

The residential occupancy group in the IBC consists of four different categories: R-1, R-2, R-3, and R-4. These subcategories are based on anticipated occupant characteristics and there are similar occupancy classifications found in NFPA 101/5000.

Group A-3 occupancy includes assembly uses intended for worship, recreation or amusement and other assembly uses not classified elsewhere in Group A including, but not limited to: Amusement arcades. Art galleries.

Residential Group R-1 occupancies containing sleeping units where the occupants are primarily transient in nature, including: Boarding houses (transient) with more than 10 occupants. Congregate living facilities (transient) with more than 10 occupants.

Chapter 3 Use and Occupancy Classification General Comments Chapter 3 provides for the classification of buildings, structures and parts thereof based on the purpose or purposes for which they are used. Section 302 identifies the occupancy groups into which all buildings, structures and parts thereof must be classified.

Group A-3 occupancy includes assembly uses intended for worship, recreation or amusement and other assembly uses not classified elsewhere in Group A including, but not limited to: Dance halls (not including food or drink consumption)

A group H occupancy is a use that involves the manufacturing, processing, generation or storage of materials that can constitute a physical or health hazard. Group H occupancies are classified into 5 high hazard areas that identify the type of hazard for each group. These 5 areas are as follows: H-1, H-2, H-3, H-4, and H-5.

What is a Group F occupancy? A group F occupancy is a use of a building that involves assembling, disassembling, fabricating, finishing, manufacturing, packaging, repair, and processing operations that would not be otherwise classified as a Group H or Group S occupancy.