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9.20.14.1.(2)
ApplicationIntent
OS2OP2OH1OS1OH4OS3
ObjectiveOS2 Structural Safety
Attribution
[F20,F80-OS2.1]
[F20,F80-OS2.3] Applies to elements that support or are part of an environmental separator or are exposed to moisture.
Application
Application 1: 
Mortar materials used for masonry, including mortar in foundations, in buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9]:
  • where the wall height above the foundation wall does not exceed 11 m, and
  • in which the roof or floor system above the first storey is not of concrete construction.
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Intent
Intent 1: 
To limit the probability of inadequate curing conditions, which could lead to a weak mortar-to-masonry bond or an inadequate resistance to freeze-thaw stresses.
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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