9.10.15.3 — Inadequate Firefighting Facilities

(1) Except as provided in Sentences (3) to (5), the maximum area of glazed openings in an exposing building face shall, (a) conform to Table 9.10.15.4., (b) conform to Subsection 3.2.3. as if the glazed openings were unprotected openings, or (c) where the limiting distance is not less than 1.2 m, be equal to or less than the limiting distance squared. (2) Where the limits on the area of glazed openings are determined for individual portions of the exterior wall, as described in Subclause 9.10.15.2. (1)(b)(iii), the maximum aggregate area of glazed openings for any portion shall not exceed the values in the row of Table 9.10.15.4. for the total area of the entire exposing building face based on the limiting distance of the individual portion. (3) The limits on the area of glazed openings shall not apply to the exposing building face of a house facing a detached garage or accessory building, where, (a) the detached garage or accessory building serves the house or an individual dwelling unit in the house, (b) the detached garage or accessory building is located on the same property as the house, and (c) the house is the only major occupancy on the property. (4) Except as provided in Sentence (5), openings in a wall having a limiting distance of less than 1.2 m shall be protected by closures, of other than wired glass or glass block, whose fire-protection rating is in conformance with the fire-resistance rating required for the wall. (5) An opening in an exposing building face not more than 130 cm2 shall not be considered an unprotected opening.

(1) Except as provided in Sentences (2) to (4) and (6), each exposing building face and any exterior wall located above an exposing building face that encloses an attic or roof space shall be constructed in conformance with Subsection 9.10.8., (a) for the exposing building face as a whole, or (b) for any number of separate portions of the exposing building face. (2) Sentence (1) does not apply where, (a) the limiting distance is not less than 1.2 m, (b) the limiting distance is less than 1.2 m but not less than 0.6 m, provided that the exposing building face has a fire-resistance rating of not less than 45 min, or (c) the limiting distance is less than 0.6 m, provided that the exposing building face has a fire-resistance rating of not less than 45 min and is clad with noncombustible material. (3) Where the limiting distance is less than 0.6 m, cladding on the exposing building face and on exterior walls located above the exposing building face that enclose an attic or roof spaces need not be noncombustible, provided the cladding, (a) conforms to Subsection 9.27.12., (b) is installed without furring members over not less than 12.7 mm thick gypsum sheathing or over masonry, (c) has a flame-spread rating not more than 25 when tested in accordance with Sentence 3.1.12.1. (2), and (d) is not more than 2 mm in thickness exclusive of fasteners, joints and local reinforcements. (4) The requirements for fire-resistance rating, type of construction and type of cladding need not apply to the exposing building faces of a house and a detached garage or accessory building that face each other, where, (a) the detached garage or accessory building serves the house or an individual dwelling unit in the house, (b) the detached garage or accessory building is located on the same property as the house, and (c) the house is the only major occupancy on the property. (5) Except for houses, combustible projections on the exterior of a wall that are more than 1 000 mm above ground level, such as balconies, platforms, canopies, eave projections and stairs, and that could expose an adjacent building to fire spread, shall not be permitted within, (a) 1.2 m of a property line or the centre line of a public way, or (b) 2.4 m of a combustible projection on another building on the same property. (6) Heavy timber and steel columns need not conform to the requirements of Sentence (1) provided the limiting distance is not less than 3 m.