Intent 1:
To limit the probability of:
- the displacement of shakes under wind and gravity loads,
- the splitting of shakes under loads imposed by the shrinkage
of shakes, or
- the exposure of fasteners to water, which could lead
to corrosion, which could lead to a reduction in the fasteners' ability
to resist expected loads, which could lead to the displacement of
shakes.
This is to limit the probability of
water penetrating directly to roof decking or sheathing, 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.