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9.8.9.4.(2)
OH4OS2
ObjectiveOH4 Vibration and Deflection Limitation
Attribution
[F22-OH4]
Application
Application 1: 
Maximum spacing of wooden stringers for stairs serving not more than one dwelling unit, where the risers support the front portion of the treads, in buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9].
Application 2: 
This also applies to stairs within dwelling units, in buildings to which Part 3 applies [see Sentence 1.3.3.2.(1) of Division A for application of Part 3], as stated in Sentence 3.3.4.7.(1).
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Intent
Intent 1: 
Where the continuous support of the treads and the lesser loading due to the nature of the occupancy allow a greater span between stringers, to limit the probability of excessive space between stringers, which could lead to excessive springiness or excessive deflection of the stringers, which could lead to user anxiety.
Intent 2: 
To supersede the requirement stated in Clause 9.8.9.4.(1)(d) regarding the maximum distance between stringers, where the continuous support of the treads and the lesser loading due to the nature of the occupancy allow a greater span between stringers.
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