ARCHIVED - 9.20.17.2.(2)

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9.20.17.2.(2)


Objective	OS3 Safety in Use
Attribution	[F20,F22-OS3.1] Applies to floors and elements that support floors. [F20,F22-OS3.7] Applies to walls, and elements that support walls, that contain doors or windows required for emergency egress.
Application	Application 1: Vertical reinforcement in flat insulating concrete form walls not in contact with the ground, in buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9], where: the floor-to-floor height is not greater than 3 m, the buildings are not more than 2 storeys in building height and they contain only a single dwelling unit, and the buildings are erected in locations where the seismic spectral response acceleration, S_a(0.2), is not greater than 0.4. Exceptions: except as stated in Sentence 9.20.1.1.(2), which applies to insulating concrete form walls other than those described above, or where the walls are designed for specified loads on the basis of ultimate and serviceability limit states.
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Intent	Intent 1: To limit the probability that the placement or amount and spacing of vertical reinforcement will not be adequate to ensure the reinforcement is encased and bonded to the concrete, which could lead to an inadequate resistance to expected loads, which could lead to concrete cracking or the displacement of walls. This is to limit the probability of: compromised structural integrity, or where elements support or are part of 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: for floors and elements supporting floors, persons losing their balance, tripping or falling, or the compromised operation of doors or windows required for egress in an emergency. This is to limit the probability of harm to persons.
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