9.4.4.4.(1)

Objective

OS3 Safety in Use

Attribution

[F21-OS3.1]Applies to footings that support floors and other elements that support floors.
[F21-OS3.7]Applies to footings that support walls that contain doors or windows required for emergency egress.

Intent

Intent 1:

To limit the probability that moisture-content-related soil movement, frost heave, pressure due to the formation of ice lenses, adfreeze, and weathering of pyritic material will lead to the cracking of foundations or building superstructures.

This is to limit the probability of:

  • compromised structural integrity, or
  • for environmental separators or elements supporting environmental separators, the displacement or failure of required environmental separation elements, which could lead to the deterioration of building elements, which could lead to compromised structural integrity.

This is to limit the probability of:

  • the excessive deflection or vibration of directly or indirectly supported floors, which could lead to persons losing their balance, tripping or falling, which could lead to harm to persons, or
  • the excessive movement or deformation of directly or indirectly supported walls with windows or doors, which could lead to compromised operation of doors or windows required for egress in an emergency.

This is to limit the probability of harm to persons.

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