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3.6.4.3.(2) | Application | Intent |
| OS1 | OP1 |
| Objective | OP1 Fire Protection of the Building |
| Attribution | |
| Application | Application 1: Protection of openings through ceiling membranes,
where the concealed space referred to in Sentence 3.6.4.3.(1) within
a floor assembly or within a roof assembly:
This applies to buildings described
in Sentence 1.3.3.2.(1) of Division A.
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| Intent | Intent 1: To limit the probability that a fire in a space below a
ceiling membrane that forms part of a required fire-resistance rating of the
ceiling assembly will spread into the plenum space through openings in the
ceiling membrane, which could lead to the premature failure of the assembly,
which could lead to the further spread of fire to other parts of the building,
which could lead to damage to the building. Intent 2: To make Appendix D information a requirement
with respect to the protection of openings through ceiling membranes.
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