The Ontario Building Code | Application
(a) terminate at a vertical fire separation having a fire-resistance rating not less than that required for the floor assembly and extending from the floor assembly to the underside of the floor or roof assembly above, or
(b) be protected in conformance with the requirements of Articles 220.127.116.11. to 18.104.22.168.
(4) Except as permitted in Sentence (5), an elementary or secondary school shall not,
(a) contain an interconnected floor space, or
(b) be located in an interconnected floor space.
(5) An interconnected floor space is permitted in an elementary or secondary school provided,
(a) the interconnected floor space consists of the first storey, and the storey next above or below it, but not both,
(b) the interconnected floor space is sprinklered,
(c) the portions of the upper floor area that do not terminate at an exterior wall, a firewall or a vertical shaft shall terminate at a vertical fire separation extending from the floor assembly to the underside of the floor or roof assembly above,
(d) except as provided in Clause (e), the fire separation required in Clause (c) need not have a fire-resistance rating,
(e) where a corridor is located immediately adjacent to the fire separationrequired in Clause (c), the fire separation shall have a fire-resistance rating of not less than 30 min, and