ARCHIVED - 9.12.2.2.(1)

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9.12.2.2.(1)


Objective	OH4 Vibration and Deflection Limitation
Attribution	[F21-OH4] Applies to floors and elements that support floors.
Application	Application 1: Minimum depth below finished ground level, of foundations of 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 9.12.2.2.(4), which applies to concrete steps with 1 and 2 risers, Sentence 9.12.2.2.(5), which applies to foundations that are in locations where experience with local soil conditions shows that lesser depths are satisfactory, or designed for lesser depths, and Sentence 9.12.2.2.(6), which applies to foundations that support buildings of other than masonry or masonry veneer construction: whose superstructure conforms with the requirements of the deformation resistance test in CAN/CSA-Z240.2.1, “Structural Requirements for Mobile Homes,” or that are used as accessory buildings and are not more than 1 storey in building height and not more than 55 m² in building area.
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Intent	Intent 1: To limit the probability of: ice lens formation beneath the foundations of regularly occupied buildings, which could lead to the displacement of foundation elements, or the displacement of relatively massive concrete steps due to frost. For floors and elements supporting floors, this is to limit the probability of excessive movement, deflection or vibration, which could lead to negative effects on the psychological well-being of persons.
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