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3.1.12.1.(2)
ApplicationIntent
OS1OP1
ObjectiveOS1 Fire Safety
Attribution
[F02-OS1.2]
Application
Application 1: 
Testing to determine the flame-spread rating and smoke developed classification of a material or assembly, in buildings described in Sentence 1.3.3.2.(1) of Division A, where the material or assembly:
  • is designed for use in a relatively horizontal position with only its top surface exposed to air,
  • cannot be tested in conformance with Sentence 3.1.12.1.(1) without the use of supporting material that is not representative of the intended installation, or
  • is thermoplastic.
Exceptions: 
except as provided in Sentence 3.1.12.1.(3), which applies to materials, assemblies or structural members that are assigned a flame-spread rating and smoke developed classification on the basis of Appendix D.
Application 2: 
In the case of flame-spread ratings, this also applies to buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9], as stated in Sentence 9.10.3.2.(1).
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Intent
Intent 1: 
To limit the probability that inappropriate criteria will be stated for the testing of materials or assemblies with respect to spread of flame, which could lead to the use of inappropriate materials or assemblies, which could lead to the materials or assemblies contributing to the spread of fire, which could lead to harm to persons.
Intent 2: 
To limit the probability that inappropriate criteria will be stated for the testing of materials or assemblies with respect to smoke generation, which could lead to the use of inappropriate materials or assemblies, which could lead to the generation of an inappropriate amount of smoke from the materials or assemblies when subjected to fire conditions, which could lead to harm to persons.
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