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3.6.3.1.(4) | Application | Intent |
| OS1 | OP1 |
| Objective | OS1 Fire Safety |
| Attribution | |
| Application | Application 1: Minimum fire-resistance rating of
the construction of an enclosure of a vent from a vertical
service space not extending to the roof, in buildings described
in Sentence 1.3.3.2.(1) of Division A. Application 2: This also applies to chutes and shafts 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 9.10.1.2.(7), except where the chute
or shaft is entirely contained within a dwelling unit.
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| Intent | Intent 1: To limit the probability that fire will spread from a vertical
service space to other parts of the building, which could lead to harm to
persons in other parts of the building. |
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