Intent 1:
To limit the probability of:
- excessive width, which could lead to excessive shrinkage,
which could lead to:
- buckling or tearing of roofing, or
- excessively wide gaps between boards, which could lead
to puncturing of roofing,
- unsupported end joints, which could lead to an inability
to resist point loads from foot traffic, which could lead to differential
deflection of unsupported sheathing board ends, which could lead to
damage to roofing, and
- aligned end joints, which could lead to discontinuity
in the roof structure, which could lead to an inability to resist
expected lateral or gravity loads, which could lead to excessive deflection,
which could lead to damage to roofing.
Where assemblies are required to provide
fire resistance, this is to limit the probability of compromised fire
resistance of the assembly, which could lead to harm to persons.