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9.20.6.3.(1)
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Application
Application 1: 
In buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9], thickness of above-ground, loadbearing, interior, unreinforced and nominally reinforced masonry walls of buildings of more than one storey in regions where the spectral response acceleration Sa(0.2) is greater than 0.55 that are reinforced in accordance with Sentence 9.20.1.2.(1) and of 3-storey buildings in regions where the spectral response acceleration Sa(0.2) is greater than 0.35 and less than or equal to 0.55 that are reinforced in accordance with Sentence 9.20.1.2.(2):
  • where the wall height above the foundation wall does not exceed 11 m, and
  • in which the roof or floor system above the first storey is not of concrete construction.
Exceptions: 
except as stated in Sentence 9.20.1.1.(2), which applies to buildings other than described above, or where the masonry is designed for specified loads on the basis of ultimate and serviceability limit states.
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Intent
Intent 1: 
To direct Code users to Sentences 9.20.10.1.(2) and (3), which contain requirements related to the ratio of thickness to lateral support spacing.
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