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9.33.6.7.(2) | Application | Intent |
| OH1 | OS2 | OS1 | OP1 |
| Objective | OS1 Fire Safety |
| Attribution | |
| Application | Application 1: Fastening of trunk supply ducts,
in 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 of sheet metal failure at nail
heads, which could lead to the collapse or opening of joints and air leakage
at duct connections, which could lead to combustible elements being exposed
to heat radiated from a furnace heat exchanger, which could lead to fire,
which could lead to harm to persons. |
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