9.23.17.4.(1)

Intent 1:

To limit the probability of an inability to resist expected lateral loads, which could lead to differential movement of sheathing board ends, which could lead to damage to cladding and the sheathing membrane, which could lead to:

• an inadequate fastening base for cladding,
• inadequate support for required cladding and elements of an environmental separator, or
• an inability to resist expected lateral or gravity loads, where sheathing provides the required resistance to racking and buckling.

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.