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3.2.3.1.(7)
OP3
ObjectiveOP3 Protection of Adjacent Buildings from Fire
Attribution
Application
Application 1: 
Closures used to protect an opening in an exposing building face for calculating the area of unprotected openings in an exposing building face, in buildings described in Sentence 1.3.3.2.(1) of Division A.
Exceptions: 
except where the closure has a protective performance equivalent to that required for the wall assembly in which it is located.
Application 2: 
This also applies to the rating for exposure to fire of exterior walls in buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9], as stated in Sentence 9.10.3.3.(2).
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Intent
Intent 1: 
To state how to treat closures and add an equivalent area in calculating the area of unprotected openings in an exposing building face. This is to limit the probability of the spread of fire from the building to an adjacent building, which could lead to damage to adjacent buildings.
Intent 2: 
To direct Code users to Sentence 3.2.3.1.(6) for the calculation of the area of unprotected openings in an exposing building face.
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