Sentence 9.3.1.6.(1)

  1. OS2
  2. OP2
  3. OH1
  4. OH4
  5. OS3
  6. OS1
  7. OS2
  8. OP2
  9. OH1
  10. OS3
  11. OS2
  12. OP2
  13. OS3

Objective

OS3 Safety in Use

Attribution

(a) [F20,F80-OS3.1]Applies to elements that support floors or steps.
(a) [F20,F80-OS3.4,OS3.7]Applies where concrete supports or is used in chimneys or fireplaces.

Intent

Intent 1:

To limit the probability of:

  • insufficient compressive strength to resist expected gravity and lateral loads, or
  • the excessive shrinkage, cracking and premature failure of concrete.

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:

  • excessive deflection or vibration of supported wood-frame floors or steps, which could lead to persons losing their balance, tripping or falling, and
  • 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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