9.10.13.14.(1)

Objective

OS1 Fire Safety

Attribution

Intent

Intent 1:

To limit the probability that fire will spread through openings in rated ceiling membranes, which could lead to the premature failure or collapse of the structure within the ceiling space, which could lead to harm to persons.

Intent 2:

To make Appendix D, Fire Performance Ratings, mandatory with regard to the construction of fire stop flaps.

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