Sentence 9.20.9.4.(8)

Intent 1:

To limit the probability of:

• flexural failure of the masonry spanning between intermediate tie locations,
• tie pullout or pushthrough (i.e. embedment failure),
• ties buckling, or
• tie material failure.

This is to limit the probability of cracking or buckling of cavity wall constructions in areas that typically experience higher levels of lateral stress, such as near floor or roof assemblies.

Where masonry construction is 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.