804.4 Interior floor finish limitations.
BC § 804.4
In buildings and spaces classified in Occupancy Group H and in all exits and exit passageways of any occupancy group, floor finishes shall be of noncombustible materials. Exception: Interior floor finish may be of combustible materials in the following spaces. Carpet-type materials must be able to withstand a minimum critical radiant flux as specified in Section 804.4.1.
1.Buildings of Type VB Construction.
2.Interior stairs in buildings of Type III, IV and V construction in Occupancy Group B, F, M or S-2, when the buildings are two stories in height or less.
3.Interior stairs in buildings of Type III, IV and V construction in Occupancy Groups R-2 and R-3 when the buildings are three stories in height or less.
4.Interior stairs in buildings of Type III, IV and V construction in Occupancy Group R-2 when occupied by three families or less.
