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9.33.6.4.(5) | Application | Intent |
OS1 | OP1 |
Objective | OS1 Fire Safety |
Attribution | |
Application | Application 1: Air duct distribution systems serving heating systems
in which the rated heat input does not exceed 120 kW and serving
only one dwelling unit, in buildings to
which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application
of Part 9].
Application 2: This also applies to ventilation ducts and their fittings,
as stated in Sentence 9.32.3.11.(1). |
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Intent | Intent 1: To limit the probability that foamed plastic, once ignited,
will contribute to the rapid spread of fire and smoke throughout the building,
which could lead to harm to persons. |
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