If the zone control has a control valve, check valve, drain, flow, and gauge then yep. In this case though you generally wouldn’t have that single “system riser” before those 4 assemblies though. You’d either just have your backflow or fire pump setup feeding the 4 zones in a manifold arrangement.
From: Fpdcdesign <fpdcdes...@gmail.com> Sent: Wednesday, February 15, 2023 11:10 AM To: Discussion list on issues relating to automatic fire sprinklers <sprinklerforum@lists.firesprinkler.org> Subject: [Sprinklerforum] Re: Zone valves and maximum area If the floor control assembly is satisfactory for subdividing a system horizontally to meet the 52000 restriction, let me pose this: Suppose you have a 160000 sqft warehouse. You have a single system riser that feeds four 40000 sqft grids, each with a floor control assembly. Good or no? Same principle. On Feb 14, 2023 at 7:27 PM, <Dwight Havens<mailto:dhavensh...@yahoo.com>> wrote: Todd, I agree with Brett, that you have two separate systems when you have a control valve and flow switch for each one, so you won't be exceeded system area limitations in NFPA 13. As a firefighter, I'm more concerned that they need to have a common fire department connection (feeding both risers), so that the fire department can supplement the sprinkler and standpipe systems without attaching to an incorrect connection. Dwight H. HavensFire Code Official-Retired. On Tuesday, February 14, 2023 at 06:18:39 PM EST, Brett Peters <br...@proudline.ca<mailto:br...@proudline.ca>> wrote: If it's one second floor zone than it's a problem, if it's a standpipe riser with 2 separate zone controls for each section of the 2nd floor then it's fine Thanks Brett Peters General Manager Installation & DesignProudline Fire Protection Services Ltd.brett@proudline.ca780<mailto:Ltd.brett@proudline.ca780> 490 7602 office ext 202780 490 7605 fax780 777 0568 cell780 718 2676 24hVisit us at www.proudline.ca<http://www.proudline.ca> Proudline now offers ULc listed monitoring services, please contact m...@proudline.ca<mailto:m...@proudline.ca> for more information On Tue, Feb 14, 2023 at 3:17 PM Fpdcdesign <fpdcdes...@gmail.com<mailto:fpdcdes...@gmail.com>> wrote: I am working on an old 4 story mill structure with existing sprinkler systems. This is a property that has been renovated quite a bit since the mid 1800s when it was built. The section I am working on consists of a building about 70ft x 500ft. There is a somewhat similar but equal sized building that goes at a 90 degree angle. The combined structure is a giant L. My project is a renovation to the 2nd floor of the first building for apartments. The other building has been renovated into a school, a couple of commercial spaces and apartments. The building I am working on has an 8” service coming in and the other building has a 10” service. At some point, the sprinkler system in the space I am working in has been replaced, probably with the last 20 years. This sprinkler system is connected to a standpipe in the school building and has a zone valve and flow switch. This connects to the riser in the school building and not the one in the building where the project is. If both 2nd floors are fed from the same riser, then the 2nd floor has 70000 sqft of system on one level fed from a single riser, but on 2 zones. The first floor has a hodge podge of connections I have not explored as it is not part of my contract. I have no idea what is going on the 3rd of 4th for the same reason. Am i reading it right that this is a problem? Todd G Williams, PEFire Protection Design/ConsultingStonington, CT860-535-2080 (ofc)860-554-7054 (fax)860-608-4559 (cell) _________________________________________________________ SprinklerForum mailing list: https://lists.firesprinkler.org/list/sprinklerforum.lists.firesprinkler.org To unsubscribe send an email to sprinklerforum-le...@lists.firesprinkler.org<mailto:sprinklerforum-le...@lists.firesprinkler.org> _________________________________________________________ SprinklerForum mailing list: https://lists.firesprinkler.org/list/sprinklerforum.lists.firesprinkler.org To unsubscribe send an email to sprinklerforum-le...@lists.firesprinkler.org<mailto:sprinklerforum-le...@lists.firesprinkler.org> _________________________________________________________ SprinklerForum mailing list: https://lists.firesprinkler.org/list/sprinklerforum.lists.firesprinkler.org To unsubscribe send an email to sprinklerforum-le...@lists.firesprinkler.org<mailto:sprinklerforum-le...@lists.firesprinkler.org>
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