Notes to Table 9.10.13.1.:
9.10.14.5. Construction of Exposing Building Face and Walls above Exposing Building Face (1) Except as provided in Sentences (2) to (7), 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 Table 9.10.14.5. and Subsection 9.10.8. Table 9.10.14.5.   Minimum Construction Requirements for Exposing Building Faces Forming Part of Sentences 9.10.14.5.(1) to (3) Item   Column 1 Occupancy Classification of Building   Column 2 Maximum Area of Unprotected Openings Permitted, % of Exposing Building Face Area   Column 3 Minimum Required Fire-Resistance Rating   Column 4 Type of Construction Required   Column 5 Type of Cladding Required 

  1.   Residential, business and personal services, and low-hazard industrial   0 - 10   1 h   Noncombustible   Noncombustible 

      >10 but ≤25   1 h   Combustible or noncombustible   Noncombustible 

          >25 but <100    45 min   Combustible or noncombustible   Combustible or noncombustible 

  2.   Mercantile and medium-hazard industrial   0 - 10   2 h   Noncombustible   Noncombustible 

      >10 but ≤25   2 h   Combustible or noncombustible   Noncombustible 

          >25 but <100    1 h   Combustible or noncombustible   Combustible or noncombustible (2) Cladding on exposing building faces and exterior walls located above exposing building faces need not conform to the type of cladding required by Table 9.10.14.5. where, (a) the exposing building face is constructed with no unprotected openings, (b) the limiting distance is not less than 0.6 m, and (c) the cladding, (i) conforms to Subsection 9.27.12., (ii) is installed without furring members over not less than 12.7 mm thick gypsum sheathing or over masonry, (iii) has a flame-spread rating not more than 25 when tested in accordance with Sentence 3.1.12.1.(2), and (iv) is not more than 2 mm in thickness exclusive of fasteners, joints and local reinforcements. (3) Except as provided in Sentence (4), where a garage or accessory building
serves a house or an individual dwelling unit in a house and is detached from the house and any other building, the exposing building face, (a) need not conform to the minimum required fire-resistance rating in Table 9.10.14.5., where the limiting distance is 0.6 m or more, (b) shall have a fire-resistance rating of not less than 45 min where the limiting distance is less than 0.6 m, and (c) need not conform to the type of cladding required in Table 9.10.14.5. regardless of the limiting distance. (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. (7) Non-loadbearing wall components need not have a minimum fire-resistance rating where, (a) the building
is 1 storey in building height, (b) the building is of noncombustible construction, (c) the building
is classified as low hazard industrial occupancy
and is used only for low fire load occupancies such as power generating plants or plants for the manufacture or storage of noncombustible
materials, and (d) the exposing building face has a limiting distance of 3 m or more.