Unless you can justify separate fire areas, you are stuck with the full 1500 Todd Williams
Fire Protection Design/Consulting Stonington, CT 860-608-4559 > > On Apr 30, 2026 at 10:30 AM, <Matt Grise (mailto:[email protected])> > wrote: > > > > > > I am looking at a building that has a 16' ceiling in MOST areas. There is a > small 250sf entry vestibule that has a 24' ceiling. The vestibule is > separated from the interior by walls and doors, but they are not fire rated > (so it would not meet separation requirements for a Room Design approach per > 13, 2016 ed 11.2.3.3). The vestibule has sprinklers at its high ceiling level. > > > > > > > > Is the unrated wall enough of a separation (draft curtain) between the > ceiling levels to allow for a QR reduction in the area/density calc for the > main floor? Would it be required to use a 1500sf operating area under the > vestibule without regard to the walls? > > > > > > > > Thanks! > > > > > > > > Matt Grise > > > _________________________________________________________ SprinklerForum > mailing list: > https://lists.firesprinkler.org/list/sprinklerforum.lists.firesprinkler.org > To unsubscribe send an email to [email protected] >
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