9.20.2.6.(1)

Objective

OS3 Safety in Use

Attribution

[F80-OS3.1]Applies to elements that support floors.
[F80-OS3.4]Applies to masonry used in chimneys and fireplaces.

Intent

Intent 1:

To limit the probability that such concrete blocks will be of inadequate mass or absorb excessive amounts of water, which could lead to inadequate resistance to freeze-thaw stresses.

This is to limit the probability of:

  • compromised structural integrity of masonry or elements supported by masonry, or
  • where elements support or are part of an environmental separator, the failure of required environmental separation elements, which could lead to deterioration, which could lead to compromised structural integrity.

This is to limit the probability of

  • excessive deflection of supported floors, which could lead to persons losing their balance, tripping or falling, or
  • the 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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