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9.26.10.4.(1)
OH1OS2
ObjectiveOH1 Indoor Conditions
Attribution
Application
Application 1: 
Fastening 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:
  • the displacement of shakes under wind and gravity loads,
  • the splitting of shakes under loads imposed by the shrinkage of shakes, or
  • the exposure of fasteners to water, which could lead to corrosion, which could lead to a reduction in the fasteners' ability to resist expected loads, which could lead to the displacement of shakes.
This is to limit the probability of:
  • water penetrating directly to roof decking or sheathing, or
  • compromised thermal performance of components intended to provide resistance to heat transfer.
This is to limit the probability of:
  • an inadequate control of relative humidity, temperatures of interior spaces or water accumulation,
  • the generation of pollutants from biological growth or from materials that become unstable on wetting, or
  • deterioration, which could lead to compromised integrity of roofs or assemblies protected by roofs.
This is to limit the probability of:
  • negative effects on the air quality of indoor spaces,
  • the inadequate thermal comfort of persons, and
  • contact with moisture.
This is to limit the probability of harm to persons.
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