| 3.1.12.1. |
Determination of Ratings
- Except as required by Sentence (2) and as permitted by Sentence (3), the flame-spread rating and smoke developed classification of a material, assembly, or structural member shall be determined on the basis of not less than three tests conducted in conformance with CAN/ULC-S102, "Test for Surface Burning Characteristics of Building Materials and Assemblies."
- The flame-spread rating and smoke developed classification of a material or assembly shall be determined on the basis of not less than three tests conducted in conformance with CAN/ULC-S102.2, "Test for Surface Burning Characteristics of Flooring, Floor Coverings, and Miscellaneous Materials and Assemblies," if 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 (1) without the use of supporting material that is not representative of the intended installation, or
- is thermoplastic.
- A material, assembly, or structural member is permitted to be assigned a flame-spread rating and smoke developed classification on the basis of Appendix D.
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