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9.3.1.1.(1)
ApplicationIntent
OS2OP2OH1OH4OS3OS1
ObjectiveOS2 Structural Safety
Attribution
[F20-OS2.1]
[F21,F80-OS2.3]
[F20-OS2.3] Applies to elements that support or are part of an environmental separator.
Application
Application 1: 
Design, mixing, placing, curing and testing of cast-in-place concrete that is not required to be reinforced that is used in:
  • footings, foundation walls, walls, columns, grade beams and piers,
  • crawl space ground cover,
  • basement floors, including floors of basement garages, subject to hydrostatic pressure or providing lateral resistance to foundation walls,
  • garage and carport floors,
  • exterior steps, including steps providing structural support (to guards or handrails, for example), and
  • fireplaces and chimneys.
This applies to 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 Sentence 9.3.1.1.(2), which applies to unreinforced site-batched concrete.
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Intent
Intent 1: 
To limit the probability of the inadequate performance or premature failure of concrete under expected environmental or structural loads.
This is to limit the probability of compromised structural integrity, which could lead to:
  • structural failure, 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.
This is to limit the probability of harm to persons.
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