9.20.3.1.(1)

Intent 1:

To limit the probability that the performance of cement and aggregate under expected structural and environmental loads will fall significantly below expectations, which could lead to cracking at mortar joints and inadequate bonding to masonry units.

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.

For floors and elements supporting floors, this is to limit the probability of excessive deflection, which could lead to persons losing their balance, tripping or falling, which could lead to harm to persons.