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9.28.1.2.(1)
ApplicationIntent
OH1OS2
ObjectiveOS2 Structural Safety
Attribution
[F20-OS2.3]
Application
Application 1: 
Stucco lath or reinforcing for stucco applied over any substrate other than masonry, on buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9].
Exceptions: 
except as stated in Sentence 9.28.1.2.(2), which applies to:
  • soft-burned tile or brick of less strength than the stucco, and
  • masonry where the surface is not sound, clean and sufficiently rough to provide a good key.
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Intent
Intent 1: 
To limit the probability of an inadequate bond between stucco and its substrate, which could lead to:
  • excessive shrinkage and cracking, or
  • delamination or cracking under gravity, wind or impact loads, or freeze-thaw stresses.
This is to limit the probability of:
  • precipitation or meltwater ingress, which could lead to deterioration, which could lead to the structural failure of exterior walls or elements protected by exterior walls, or
  • stucco detaching and falling from the building.
This is to limit the probability of harm to persons.
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