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9.3.1.7.(1)
OS2OP2OH1OH4OS3OS1OS2OP2OH1OS3OS2OS3OP2
ObjectiveOP2 Structural Sufficiency of the Building
Attribution
(b) [F20-OP2.1,OP2.4]
(b) [F21-OP2.3,OP2.4]
(b) [F80-OP2.3]
(b) [F20-OP2.3] Applies where concrete is used in an environmental separator.
Application
Application 1: 
Mixes for site-batched, cast-in-place concrete that is not required to be reinforced that is used in floors, in buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9].
Exceptions: 
except as stated in Clause 9.3.1.7.(1)(c), which applies to concrete for garage and carport floors where exposure to de-icing salts, water from rain or melting snow, freezing and thawing stresses, traffic, abrasion or other severe exposure conditions is likely.
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Intent
Intent 1: 
To limit the probability of:
  • an inappropriate cement/aggregate ratio, or
  • excessive water in concrete.
This is to limit the probability of:
  • aggregate segregation,
  • reduced compressive strength,
  • increased shrinkage and cracking, or
  • low resistance to air and moisture transfer.
This is to limit the probability of compromised structural integrity, which could lead to:
  • structural failure,
  • where concrete 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 further compromised structural integrity, or
  • excessive deflection or cracking of floors.
This is to limit the probability of:
  • the space being unsuitable for its intended use, and
  • damage to the building.
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