9.20.4.1.(1)

Objective

OS2 Structural Safety

Attribution

[F20,F61-OS2.3]Applies to elements that support or are part of an environmental separator or are exposed to moisture.

Intent

Intent 1:

To limit the probability of:

  • excessively thick mortar joints in relation to the surface area of the masonry, which could lead to water leakage through shrinkage cracks and water absorption through mortar joints, or
  • excessively thin mortar joints, which could lead to inadequate support of masonry or inadequate masonry-to-mortar bond strength, which could lead to cracking.

This is to limit the probability of compromised structural integrity, which could lead to:

  • structural failure of masonry construction,
  • where masonry construction is part of an environmental separator, the excessive deformation, displacement or failure of required environmental separation elements, which could lead to deterioration, which could lead to further compromised structural integrity, or
  • in assemblies exposed to moisture or the exterior, damage and deterioration, which could lead to further compromised structural integrity.

This is to limit the probability of harm to persons.

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