1. OS2
  2. OP2
  3. OH1
  4. OS1


OS1 Fire Safety


[F20,F22-OS1.2]Applies to assemblies required to provide fire resistance.


Intent 1:

To limit the probability of insufficient contact area between mortar and masonry veneer, which could lead to:

  • the wall being unable to support its own weight or lateral loads,
  • insufficient bonding area between ties and mortar, or
  • insufficient bond strength between masonry units.

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.

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