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3.1.10.4.(1)
ApplicationIntent
OP1OS1OP3
ObjectiveOS1 Fire Safety
Attribution
[F03-OS1.2]
Application
Application 1: 
The extension of a firewall above a roof surface to form a parapet.
This applies to buildings described in Sentence 1.3.3.2.(1) of Division A, and to buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) for application of Part 9] as stated in Sentence 9.10.11.3.(1).
Exceptions: 
except as provided in:
  • Sentence 3.1.10.4.(2), which applies to a firewall separating two buildings with roofs at different elevations, and
  • Sentence 3.1.10.3.(2), which applies to a firewall terminating on the underside of a reinforced concrete roof slab.
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Intent
Intent 1: 
To limit the probability that a firewall will not extend sufficiently above a roof surface, which could lead to the spread of fire from the roof of one building to the roof of another building, which could lead to harm to persons in the building not originally involved in the fire.
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