9.20.4.1.(1)

Objective

OP2 Structural Sufficiency of the Building

Attribution

[F20,F61-OP2.3]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 of masonry construction,
  • where masonry construction is part of an environmental separator, the displacement or failure of required environmental separation elements, which could lead to deterioration,
  • in assemblies exposed to moisture or the exterior, damage and deterioration, or
  • an inability to resist expected loads, which could lead to:
    • the excessive movement or deformation of walls, or
    • the excessive deflection or vibration of floors.

This is to limit the probability of:

  • the space being unsuitable for its intended use,
  • compromised operation of windows or doors, or
  • damage to the building.

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