Ontario Building Code - Section 450

3.16.1.6. 2024 Building Code Compendium 262 Division B – Part 3 (2) The automatic sprinkler system shall be designed, constructed, installed and tested in conformance with NFPA 13, “Standard for the Installation of Sprinkler Systems” or the appropriate NFPA sprinkler standard for the most severe hazard to which the storage system is exposed. (3) Sprinkler protection shall be provided under all platforms and walkways. (4) Except where the platforms or walkways are of open construction, any openings for egress stairs shall be protected by noncombustible draft stops not less than 450 mm below the floors above. (5) The automatic sprinkler system shall be electrically supervised to indicate a trouble signal on the building fire alarm system annunciator or where the building does not have a fire alarm system, to notify the person controlling the operation of the building for each of the situations listed in Sentence 3.2.4.9.(3). (6) The automatic sprinkler system shall be designed to notify the fire department that a waterflow switch has been activated. (7) The notification to the person controlling the building and the fire department referred to in Sentences (5) and (6) shall be provided in accordance with Sentence 3.2.4.7.(4). (8) A permanent sign shall be posted, at or near the sprinkler control valve, containing (a) the word NOTICE in contrasting letters, (b) a description of the commodity class as defined in NFPA 13, “Standard for the Installation of Sprinkler Systems,” and (c) the sprinkler design criteria used for the shelf and rack storage system. 3.16.1.7. Exits and Means of Egress (1) Except as permitted in Sentences (2) and (3), every walkway or platform level shall be provided with no fewer than two exits conforming to Section 3.4. (2) An access to exit from an elevated platform level may be provided by means of open unenclosed stairs serving (a) not more than four platform levels, the highest of which shall be not more than 12 m above the main floor, where the shelf and rack storage system is intended for the storage of Class I, II, III and IV commodities, as defined in NFPA 13, “Standard for the Installation of Sprinkler Systems,” and (b) not more than two platform levels, where the shelf and rack storage system is intended for the storage of Group A, B and C plastics and rubber tires, as defined in NFPA 13, “Standard for the Installation of Sprinkler Systems.” (3) Any single platform or walkway in a shelf and rack storage system may be served by a single unenclosed stair leading to the platform or walkway level immediately below provided (a) the platform or walkway does not exceed 200 m 2 in area, (b) the travel distance on the platform or walkway to the level below, including the travel distance along the single unenclosed egress stair, does not exceed 25 m, and (c) the platform or walkway below is provided with two separate egress stairs or exits. (4) The maximum travel distance on an elevated platform to the ground floor level, including the travel distance along unenclosed stairs, shall not exceed 45 m. (5) The maximum travel distance on an elevated platform to an exit serving that platform shall not exceed 45 m. (6) Except as permitted in Sentence (7), the maximum travel distance from the bottom of an unenclosed stair to an exit along a main aisle on the ground floor level shall not exceed 45 m.