very flaky and not consistent with the IBC definition
[BE] FLOOR AREA, NET. The actual occupied area not including unoccupied accessory areas such as corridors, stairways, ramps, toilet rooms, mechanical rooms and closets.
Commentary
This area is intended to include only the room areas that are used for specific occupancy purposes and does not include circulation areas, such as corridors, ramps or stairways, or service and utility spaces such as toilet rooms and mechanical and electrical equipment rooms. Net floor area is typically measured between inside faces of walls within a room. Floor area, net and gross, is utilized in Table 1004.5 to determine occupant load for a space.