Gosh, 73-feet is a long distance to drag fire hose from the valve at the exit door along the length of the rated exit passageway. If there’s no occupancy openings in the length of the exit passageway, then maybe you could ask the AHJ if he wants a hose valve at the inside end of the exit passageway. If that’s the case, then I don’t think you need to add the additional 250-gpm. Just use 500 plus 250. Just my opinion. Rick Matsuda
> On May 10, 2024, at 3:30 PM, Steve Leyton <[email protected]> wrote: > > > Do you have a hose connection on the 1st floor landing of the remote > standpipe stairwell in addition to the one at the exit passageway door? And > is there access to occupiable areas on the first floor from the passageway or > stairwell? > > Obviously, two or more hose connections supplied by a feed main on a single > floor is a horizontal standpipe by definition, but it would seem to me that > in this type of egress system that would be redundant or not of value > depending on where a firefighter would be going with the water after > connection to one or the other hose connection. > > The foregoing does not represent any opinion or interpretation of the > standard on behalf of NFPA or the NFPA 14 Technical Committee. > > > Steve Leyton, President > T | 619.255.8964 x 102 | www.protectiondesign.com > 2851 Camino Del Rio South | Suite 210 | San Diego, CA 92108 > Fire Protection System Design | Consulting | Planning | Training > > > > From: Chris Wilson [mailto:[email protected]] > Sent: Friday, May 10, 2024 7:42 AM > To: [email protected] > Subject: [Sprinklerforum] Standpipe NFPA14 2019 > > > To all, > I have a 4 story building with 2 exit stairways I am installing a class I > manual wet standpipe combination sprinkler system. The remote stair is on the > interior of the building and has a rated exit passageway on the first floor > that is 73’ long. I am placing all hose valves on the main floor landings and > one a the exit door of the exit passage way. > > I am planning on calculating 500 gpm from the remote stand pipe and 250 for > the 2nd standpipe. The exit passage way hose connection will be fed by a > 2/12 lateral pipe fed from the 4” horizontal supply to the remote standpipe > as it pass by the exit passageway. > > Do I need to include an additional 250 gpm in my calcs at the hose valve at > the exit passageway? > > Thanks > Christopher S. Wilson SET > Project Design Manager > Treasure Valley Fire Protection > 2731 S. Saturn Way > Boise, ID 83709 > Phone: 208-362-1888 > Fax: 208-362-2207 > > please note all TVFP email > addresses have changed > new email below > > [email protected] > > > _________________________________________________________ > SprinklerForum mailing list: > https://lists.firesprinkler.org/list/sprinklerforum.lists.firesprinkler.org > To unsubscribe send an email to [email protected]
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