The Ontario Building Code | Loads for Occupancy Served
220.127.116.11. Loads for Occupancy Served
(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,
(c) interior balconies and mezzanines.