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9.26.10.5.(1)
ApplicationIntent
OH1OS2
ObjectiveOS2 Structural Safety
Attribution
[F61-OS2.3]
Application
Application 1: 
Maximum exposure of wood shakes, on roofs of buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9].
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Intent
Intent 1: 
To limit the probability of:
  • insufficient overlap of wood shakes, which could lead to an insufficient number of shake plies over the roof surface, which could lead to coinciding defects, or
  • excessive unsupported length, which could lead to excessive vulnerability to displacement due to wind.
This is to limit the probability of water penetrating directly to roof decking or sheathing, which could lead to deterioration, which could lead to the structural failure of roofs or assemblies protected by roofs, which could lead to harm to persons.
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