The Ontario Building Code | General Requirements

3.13.4.2. General Requirements

(1) Except as provided in Sentence (2), escalators conforming to the requirements of Sentences 3.13.4.5.(3) and 3.13.4.6.(1) shall be acceptable as part of a required means of egress in a rapid transit station.

(2) Escalators forming part of a required means of egress shall not comprise more than one-half of the required egress capacity from any one level.

(3) Horizontal exitsconforming to Sentence (4) may provide all of the required egress capacity from a rapid transit station.

(4) Horizontal exitsto any one building shall not comprise more than one-half of the required egress capacity from any area within a rapid transit station.

(5) A protected route shall be provided with emergency ventilation conforming to Subsection 3.13.7.

(6) In an aboveground unenclosed station, the protected route is permitted to begin at the point of leaving the platform.

(7) In an enclosed or underground station, the protection for the protected route shall consist of,

(a) a fire separation having a fire-resistance ratingnot less than 1 h,

(b) construction having a fire-resistance rating not less than 1 h, or

(c) wireref ="http://thehandyforce.com/electrical/" title ="Electricians in East York">wired glass assemblies conforming to MMAH Supplementary Standard SB-2, "Fire Performance Ratings".