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4.2.4.4.(1)
OP2OP2
ObjectiveOP2 Structural Sufficiency of the Building
Attribution
[F21-OP2.4] Applies to portion of Code text: “… the bearing surface of a foundation shall be below the level of potential damage, including damage resulting from frost action …”
Application
Application 1: 
Minimum depth of bearing surface of foundations.
Exceptions: 
except as exempted in Sentence 4.2.4.4.(2), which applies to foundations not below the level of potential damage from frost.
This applies to buildings described in Sentence 1.3.3.2.(1) of Division A and buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A] that are required to be designed to the requirements of Part 4.
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Intent
Intent 1: 
To limit the probability that frost action will occur below a foundation unit, which could lead to excessive upward displacement of the unit, which could lead to:
  • damage to the building, and
  • excessive distortion of the building, which could impede the intended use and occupancy of the building.
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