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.

This is to limit the probability of the deformation or detachment of interior finishes, which could lead to:

• where interior finishes are required to protect foamed plastics, a loss of fire protection, or
• where interior finishes are installed to contribute to the required fire resistance of assemblies, a loss of fire resistance.

This is to limit the probability of the growth and spread of fire, which could lead to 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.