We have a 4-story apartment building with commercial units on the first floor, residential on all floors above.
The architect is providing a 2-hour separation at the 2nd floor deck (concrete on a metal deck), and is requesting NFPA 13 for the 1st floor and NFPA 13R for the units above.
The AHJ came back and requested NFPA 13 for the corridors and elevator lobbies on floors 2-4 to avoid separation of elevator lobbies from corridors, but still keep the draft/smoke control doors at the hoistways.
Can NFPA 13 and 13R be mixed on the upper levels?
Is this approach valid from a code-standpoint?
Is there validation or different approaches that would need to take place to make this happen?
Thanks in advance.
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