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9.33.6.2.(7) | Application | Intent |
OH1 | OS2 |
Objective | OS2 Structural Safety |
Attribution | |
Application | Application 1: Strength when wet and corrosion resistance of materials
used 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 inadequate moisture or corrosion
resistance, which could lead to the deterioration and collapse of ducts, which
could lead to reduced airflow, which could lead to an inability to maintain
the minimum indoor air temperatures [see Sentence 9.33.3.1.(1)], which
could lead to condensation, which could lead to deterioration, which could
lead to compromised structural integrity, which could lead to harm to persons.
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