(1)
The following shall be designed to carry not less than the specified load required for the occupancy they serve, provided they cannot be used by an assembly of people as a viewing area:
(a)
corridors, lobbies and aisles not more than 1 200 mm wide,
(b)
all corridors above the first storey of residential areas of apartments, hotels and motels, and
(c)
interior balconies and mezzanines.