If they did a calculation on the existing system with the 1/2” sprinklers and achieved that density, I do not believe they have to upgrade anything. I think the 0.2 restriction is for new or upgraded systems only.
The other consideration is that the placard could be total BS. Someone just put it up there to satisfy a recommendation. I ran into this in a location in MA where the placard said it could provide some big density. I had to recalculate it because they were adding some racks and the original calc was off by about 300 psi. The insurance company required the entire site be recalculated. Todd Williams Fire Protection Design/Consulting Stonington, CT 860-608-4559 > > On Jul 31, 2024 at 5:27 PM, <Travis Mack (mailto:[email protected])> wrote: > > > > > The limit for 0.2 is in the storage section. If you are not in storage, calc > it and you are good. > > > > > > > > Travis Mack, SET > > > > M.E.P.CAD | > > > > 181 N. Arroyo Grande Blvd. #105 I Henderson, NV 89074 > > > > www.mepcad.com (http://www.mepcad.com/) | m: 480.547.9348 > > > > > > > > AutoSPRINK | AutoSPRINK FAB | AutoSPRINK RVT | AlarmCAD > > > > > > > > Book appointment time in my calendar > > > > https://calendly.com/t_mack_mepcad > > > > From: Bobby Welch <[email protected]> > Sent: Wednesday, July 31, 2024 4:11:17 PM > To: [email protected] > <[email protected]> > Subject: [Sprinklerforum] Old pipe Schedule system > > > > > > > I am working on a project that looks to be an old pipe scheduled system. the > branch line schedule is 1”, 1”, 1.25”, 1.5”, 1.5”, 2” and the heads appear to > be ½” 5.6K sprinklers. The spacing is 10’ x 10’ on the heads. There is a > placard on the riser that states the area was calculated at a 0.60 over 2000 > sq. ft., but it is newer I am assuming that this was put on the riser by > mistake. From the type of heads and the spacing I would assume ordinary > hazard is what this system was designed for. My question is there a limit to > the design density for 5.6K sprinklers? It is my understanding that 5.6K > sprinklers cannot be used for anything greater then a 0.20 density. > > > > > Bobby Welch | Sprinkler Systems Designer > KOORSEN FIRE & SECURITY > 8090 N Dixie Dr, Dayton, OH 45414 > P 937.641.8403 | Ext. 0318 | M 937.594.8457 > [email protected] (mailto:[email protected]) | > www.koorsen.com (http://www.koorsen.com) > > > > 24x7x365 Service: 937.660.7050 | [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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