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4.2.4.4.(2)
OP2
ObjectiveOP2 Structural Sufficiency of the Building
Attribution
Application
Application 1: 
Protection against frost action where the bearing surface of a foundation is 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 a foundation unit will not be designed for frost action expected to occur below the foundation, 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.
Intent 2: 
To exempt from the application of Sentence 4.2.4.4.(1) foundations where conditions are such that they are unlikely to be negatively affected by frost action.
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