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9.33.6.4.(8) | Application | Intent |
| OH1 | OS1 | OP1 | OS2 |
| Objective | OP1 Fire Protection of the Building |
| Attribution | |
| Application | Application 1: Installation of linings of ducts near fire dampers, fire stop
flaps and other closures, 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 that duct lining will interfere
with the opening or closing of fire dampers, which could lead to an
inability to retard the spread of fire and smoke to other parts of
the building, which could lead to damage to the building.
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