Sorry for the delay in responding; I deleted this email. I would have to see the floor plan to form an opinion, and based on what you've got, the issue has taken a hard left turn. The standard doesn't require a hose connection on the apparatus access level, which I assume is the subject floor here, but many fire departments do as a matter of local policy and practice. But you have to have the one to satisfy the exit corridor provision, so I'd say that if the FD requires both connections, you have a horizontal standpipe but if you can omit the one at the stair, then you would perform a "conventional" calc' regarding the added flow of the second standpipe. BUT... this is all best answered in collaboration with the serving FD.
The foregoing is my opinion only and does not represent NFPA or the NFPA 14 Technical Committee, nor intended to serve as an interpretation of the standard. Protection Design and Consulting Steve Leyton, President T | 619.255.8964 x 102 | www.protectiondesign.com<http://www.protectiondesign.com/> 2851 Camino Del Rio South | Suite 210 | San Diego, CA 92108 Fire Protection System Design | Consulting | Planning | Training From: Chris Wilson <[email protected]> Sent: Monday, May 13, 2024 6:57 AM To: Discussion list on issues relating to automatic fire sprinklers <[email protected]> Subject: [Sprinklerforum] Re: Standpipe NFPA14 2019 Steve, Yes there is a hose connection at the first floor landing of the remote stand pipe. Yes there is access to occupied first floor space via the exit passage and the remote stairway. 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]<mailto:[email protected]> From: Steve Leyton <[email protected]<mailto:[email protected]>> Sent: Friday, May 10, 2024 7:29 PM To: Discussion list on issues relating to automatic fire sprinklers <[email protected]<mailto:[email protected]>> Subject: [Sprinklerforum] Re: Standpipe NFPA14 2019 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. [cid:[email protected]] Steve Leyton, President T | 619.255.8964 x 102 | www.protectiondesign.com<http://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]<mailto:[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]<mailto:[email protected]>
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