A set of plans have been submitted for a building that contains

adjoining F-1 and S-1 occupancies. The documents do not show any

fire separation between the two occupancies, which is allowed by

Table 508.4 of the 2012 IBC. Are these occupancies considered

"separated" for the purpose of calculating allowable height and




Yes. Although the occupancies are not required to be physically

separated, for the purpose of building height and area only, they

are still evaluated under the separated option. These are

occupancies that share the same level of hazard with respect to fire

safety. It is possible, therefore, to have multiple occupancies that

comply with the separated use provisions that require no

separation between them.


But note that, where code requirements are based on established

fire areas, occupancies not separated must be considered as

sharing the same fire area.