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3.1.13.9.(1) | Application | Intent |
| OS1 | OP3 |
| Objective | OS1 Fire Safety |
| Attribution | |
| Application | |
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| Intent | Intent 1: To limit the probability that combustible wall and ceiling
finishes will be used in an underground walkway, which could lead to fire
growth and the spread of fire, which could lead to harm to persons.
Intent 2: To exempt interior wall finishes in underground walkways
from the application of Sentence 3.1.13.2.(1), which would otherwise
allow finishes with flame-spread ratings up to 150, on the basis that noncombustible
finish materials are needed in these locations to protect persons during evacuation.
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