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9.10.14.5.(2)
ApplicationIntent
OP3
ObjectiveOP3 Protection of Adjacent Buildings from Fire
Attribution
[F02,F03-OP3.1]
Application
Application 1: 
Cladding installed on exposing building faces and on exterior walls located above exposing building faces, in buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9], where:
  • the exposing building face is constructed with no unprotected openings,
  • the limiting distance is not less than 0.6 m, and
  • the cladding
    • conforms to Subsection 9.27.13.,
    • is installed without furring members over at least 12.7 mm gypsum sheathing or over masonry
    • has a flame-spread rating not greater than 25 when tested in accordance with Sentence 3.1.12.1.(2), and
    • does not exceed 2 mm in thickness exclusive of fasteners, joints and local reinforcements.
Exceptions: 
except as stated in:
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Intent
Intent 1: 
To exempt cladding from the requirements of Sentence 9.10.14.5.(1) [specifically “Type of Cladding Required” in Table 9.10.14.5.], if certain conditions are met. The conditions include limitations on openings, limiting distance, and additional requirements with respect to the cladding and its substrate.
This is to limit the probability that:
  • fire will spread from the subject building to an adjacent building, which could lead to damage to the adjacent building,
  • fire will spread from the subject building to an adjacent building through unprotected openings, which could lead to damage to the adjacent building, and
  • an exposing building face will be ignited and contribute to, or be involved in, a fire, which could lead to the spread of fire from the subject building to an adjacent building, which could lead to damage to the adjacent building.
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