1. OS2
  2. OP2
  3. OH1
  4. OS1
  5. OH4
  6. OS3


OS3 Safety in Use


[F80-OS3.1]Applies to floors and elements that support floors.
[F80-OS3.7]Applies to walls, and elements that support walls, that contain doors or windows required for emergency egress.


Intent 1:

To limit the probability of:

  • excessively rapid corrosion, which could lead to the excessive deflection or structural failure of lintels, or
  • the accumulation of corrosion by-products between lintels and masonry, which could lead to compressive stresses.

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:

  • compromised operation of doors or windows required for egress in an emergency, or
  • persons losing their balance, tripping or falling.

This is to limit the probability of harm to persons.

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