ARCHIVED - 9.23.9.1.(2)

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9.23.9.1.(2)


Objective	OH1 Indoor Conditions
Attribution	[F20,F22-OH1.1,OH1.2,OH1.3] Applies to elements that support or are part of an environmental separator.
Application	Application 1: Minimum dimensions and installation of ribbon boards supporting lumber floor joists, in wood-frame constructions to which Section 9.23. applies [see Sentence 9.23.1.1.(1) for application of Section 9.23.].
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Intent	Intent 1: To limit the probability of inadequate support for joists, which could lead to an inability to resist expected gravity loads. Where wood-frame construction supports or is part of an environmental separator, this is to limit the probability of the displacement or failure of required environmental separation elements, which could lead to: condensation, precipitation ingress, excessive heat transfer, pollutant ingress, or compromised thermal performance of components intended to resist heat transfer. This is to limit the probability of: inadequate control of temperatures of interior spaces, drafts, relative humidity or water accumulation, the generation of pollutants from biological growth or from materials that become unstable on wetting, or deterioration, which could lead to further compromised integrity of environmental separators. This is to limit the probability of: negative effects on the air quality of indoor spaces, the inadequate thermal comfort of persons, and contact with moisture. This is to limit the probability of harm to persons.
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