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9.29.10.5.(1)
OH1OS2OS1OP2
ObjectiveOS1 Fire Safety
Attribution
[F81-OS1.2] Applies where the substrate is required to act as fire protection for foamed plastics or to contribute to the required fire resistance of assemblies.
Application
Application 1: 
Caulking of joints for ceramic or plastic tile interior wall finishes installed around bathtubs, in 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 that the performance of caulking will fall significantly below expectations, which could lead to the premature failure of caulking, which could lead to the failure of tiles and substrates on repeated exposure to water, which could lead to the ingress of water into assemblies.
This is to limit the probability of the deterioration of the substrate, which could lead to:
  • where the substrate is required to protect foamed plastics, a loss of fire protection, or
  • where the substrate is required to contribute to the required fire resistance of assemblies, a loss of fire resistance.
This is to limit the probability of the growth and spread of fire, which could lead to harm to persons.
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