ARCHIVED - 9.29.5.9.(7)

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9.29.5.9.(7)


Objective	OH1 Indoor Conditions
Attribution	[F20,F22-OH1.1,OH1.2,OH1.3] Applies where interior finishes contribute to the required bracing or lateral support for studs, or where interior finishes support or serve as required environmental separation elements.
Application	Application 1: Installation of screws in single-layer installations of gypsum board interior wall and ceiling finishes on wood furring or framing, in buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9].
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Intent	Intent 1: To limit the probability of damaging the paper facing and crushing the gypsum board, which could lead to inadequate support for gypsum board, which could lead to an inability to resist expected impact, gravity or lateral loads. This is to limit the probability of: where interior finishes contribute to the required bracing or lateral support for studs, the buckling or racking of walls, or where interior finishes support or serve as required environmental separation elements, the deformation or detachment of interior finishes. This is to limit the probability of the failure of required environmental separation elements, which could lead to: condensation, precipitation ingress, pollutant ingress, or compromised thermal performance of components intended to resist heat transfer. This is to limit the probability of: an inadequate control of temperatures of interior spaces, 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, or contact with moisture. This is to limit the probability of harm to persons.
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