9.26.2.3.(2)

Intent 1:

To limit the probability of:

• an inadequate resistance to withdrawal from the substrate, and
• an inadequate contact area between the staple's crown and the shingle's surface, which could lead to excessive stressing of the staple/shingle interface, which could lead to pull-through failure.

This is to limit the probability of the displacement of shingles, which could lead to precipitation or meltwater ingress, which could lead to deterioration, which could lead to the structural failure of roofs or assemblies protected by roofs, which could lead to harm to persons.