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3.1.10.5.(1)
ApplicationIntent
+OP1OS1OP3
ObjectiveOS1 Fire Safety
Attribution
[F03-OS1.2] Applies to portion of Code text: “… the aggregate width of openings shall be not more than 25% of the entire length of the firewall.”
Application
Application 1: 
Aggregate width of openings through a firewall.
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) of Division A for application of Part 9] as stated in Sentence 9.10.11.3.(1).
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Intent
Intent 1: 
To limit the probability of a large number of openings in a firewall, which could lead to the failure of the protective closures for these openings during a fire, which could lead to the spread of fire from one building to another, which could lead to harm to persons in the building not originally involved in the fire.
Intent 2: 
To limit the probability of a large number of openings in a firewall, which could lead to the failure of the integrity of the firewall, which could lead to the spread of fire from one building to another, which could lead to harm to persons in the building not originally involved in the fire.
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