9.3.1.9.(2)

Objective

OS3 Safety in Use

Attribution

[F20,F61,F55-OS3.1]Applies to floors and elements that support floors.
[F20,F61,F55-OS3.4]Applies to concrete that supports or is used in chimneys or fireplaces.

Intent

Intent 1:

To limit the probability of:

  • interruption of the hydration process,
  • freezing and expansion of internal water, and
  • over-watering due to the melting of ice.

This is to limit the probability of the failure of internal bonds in the concrete, which could lead to reduced compressive strength, which could lead to an inadequate resistance to:

  • expected environmental or structural loads, or
  • air and moisture transfer.

This is to limit the probability of:

  • compromised structural integrity, or
  • where concrete supports or is used in an environmental separator, 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:

  • uneven concrete floor surfaces, which could lead to tripping,
  • excessive deflection or vibration of supported wood-frame floors, which could lead to a loss of balance, tripping or falling, and
  • failure of fireplaces or chimneys, which could lead to the leakage of combustion products, including carbon monoxide gas, into living space, which could lead to the asphyxiation or acute poisoning of persons.

This is to limit the probability of harm to persons.

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