10 x 10 = 100 sqft/sprinkler x .6 = 60 gpm/sprinkler Q=K sqrt(P) 60= 5.6 sqrt(P) P =115 psi Ouch please check my math
2000 sq ft / 100 = calc 20 or more heads sqrt 2000 x 1.2 = 53.7' calc 6 heads on line .6/2000 = + 1200 gpm probably closer to 1400 gpm 8" main? 150 psi at Riser or more ? Confirm Sprinklers ...Maybe they are 1/2" thread but 8K maybe old GEM 950 and the sliding K could be 8.4K bad joke On Wed, Jul 31, 2024 at 2:11 PM Bobby Welch <[email protected]> wrote: > 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] | 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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