Residential sprinklers are “permitted” in dwelling units, not “required”, right? Couldn’t you use any one of a number of commercial QR extended coverage sprinklers?
That might mess you up if you are trying to do a 4-sprinklers residential calc… or it could help because you could get a larger K-factor and lower starting pressure for 20x20. -Kyle M From: Sprinklerforum [mailto:[email protected]] On Behalf Of John Irwin Sent: Tuesday, November 21, 2017 4:27 AM To: [email protected] Subject: [EXTERNAL] Interesting issue .. residential sprinklers .. I am working on a project with a lot of 20x20 rooms in dwelling units. I have a concrete deck so my piping will be exposed. I am trying to find a 20x20 solutions but keep running in to road blocks. Maybe someone has an idea. The way I see it, I need one of the following … I need a residential pendent sprinkler that can be installed with a deflector distance from the deck greater than allowed by NFPA 13 OR I need a residential UPRIGHT sprinkler listed for 20x20 spacing OR I need a listed hanger attachment that will allow me to install 1" branch piping tight to a concrete deck. And go. John Irwin DynaFire, Inc.
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