Sentence 9.29.5.5.(1)

Intent 1:

To limit the probability of an inadequate penetration of fasteners, which could lead to an inability to resist expected impact, gravity or lateral loads.

Where interior finishes support or serve as required environmental separation elements, this is to limit the probability of the deformation or detachment of interior finishes, which could lead to 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, or
• the inadequate thermal comfort of persons.

This is to limit the probability of harm to persons.

Intent 2:

To exempt assemblies from the application of this Sentence, where fire tests have proven that shorter nails or screws will be adequate for the required fire-resistance rating.