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9.33.6.6.(2) | Application | Intent |
| OS1 | OS3 | OH1 | OS2 |
| Objective | OS3 Safety in Use |
| Attribution | |
| Application | Application 1: Material for duct supports, 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 inadequate support will lead
to the collapse of ducts, which could lead to falling parts, which could lead
to harm to persons. [See Sentence 9.33.6.7.(3) for the requirement regarding
the support of branch ducts.] |
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