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Enclosure Pressurization

Question asked by hamad.koroni on Feb 22, 2020
Latest reply on Feb 23, 2020 by milt.werner

While I am conducting a site visit to one of pressurized stair, I found out there is a concrete slab separated the mechanical equipment from the pressurized stair. The stair enclosure was supposed to be built in compliance with (2) of NFPA 101-2018 Edition which doesn’t seem require a slab separation based on the Exhibit 7.126 herewith attached. Would you please advise if the existing concrete slab will form contradiction with NFPA 101 implication or it could influence the stair pressurization integrity?  Thank you.