The Ontario Building Code | Stairways in Group D or E Buildings
220.127.116.11. Stairways in Group D or E buildings
(1) Notwithstanding the requirements of Sentences 18.104.22.168.(1), 22.214.171.124.(1) and Article 126.96.36.199., where a suite of Group D or E occupancyis located partly on the first storey and partly on the second storey or partly on the second storey and partly on the third storey, stairways serving that suite need not be constructed as exit stairs, provided,
(a) the buildingis not greater than three storeys in building height,
(b) the suiteis separated from other occupancies by a fire separation having a fire-resistance rating of not less than 45 min,
(c) the area occupied by the suite is not greater than 100 m² per storey, other than the exitlevel storey,
(d) the maximum travel distance from any point in the suite to an exterior exit is not greater than 25 m,
(e) the floor assemblies have a fire-resistance rating of not less than 45 min or are of noncombustible construction,
(f) the basementand first storey are separated by a fire separation having a fire-resistance rating of not less than 45 min, and
(g) a smoke alarm is installed on each floor of the suite, including the basement, in accordance with Subsection 9.10.19.
(2) Revoked: O. Reg. 191/14, s. 99.
9.9.5. Obstructions and Hazards in Means of Egress