I’m pretty close to 20x20 in the most remote two rooms. From there by rooms drop to 12x12 and then closet size rooms. But having the ability to get 10’ off the walls in these units saves a TON of sprinklers.
John Irwin DynaFire Inc. *From:* Sprinklerforum [mailto: [email protected]] *On Behalf Of *Travis Mack *Sent:* Tuesday, November 21, 2017 10:23 AM *To:* [email protected] *Subject:* Re: [EXTERNAL] Interesting issue .. residential sprinklers .. That’s why I mentioned if he had a true 20x20. I couldn’t figure why you would want to do that with a 4.9k sprinkler. But I figured he had project specific reasons. I like how the 2016 edition cleared that up. I had many battles with AHJs about using the criteria in chap 8 for spray sprinklers to do room area / # of sprinklers In a room. Travis Mack, SET MFP Design, LLC "Follow" us on Facebook: https://www.facebook.com/pages/MFP-Design-LLC/92218417692 Send large files to MFP Design via: https://www.hightail.com/u/MFPDesign Sent from my iPhone On Nov 21, 2017, at 8:14 AM, Pete Schwab <[email protected]> wrote: Remember, if the room/compartment is 800 Sq Ft or less, you can average the spacing of the residential sprinkler(s) over the room. It will not be starting at 67 PSI. <image001.png> Peter Schwab VP of Purchasing and Engineering technologies Wayne Automatic Fire Sprinklers Inc. 222 Capitol Court Ocoee, Fl 34761 *Mobile: (407) 468-8248* Direct: (407) 877-5570 Fax: (407) 656-8026 www.waynefire.com <image002.jpg> *I sleep in a sprinklered home, do you? * *From:* Sprinklerforum [ mailto:[email protected] <[email protected]>] *On Behalf Of *Travis Mack *Sent:* Tuesday, November 21, 2017 9:54 AM *To:* [email protected] *Subject:* Re: [EXTERNAL] Interesting issue .. residential sprinklers .. If you are truly 20x20, then you are looking at 67 psi with the 4.9 vs 13 psi with something like a Tyco EC-11. Do you have enough pressure where 50 psi is of no issue? Travis Mack, SET MFP Design, LLC "Follow" us on Facebook: https://www.facebook.com/pages/MFP-Design-LLC/92218417692 Send large files to MFP Design via: https://www.hightail.com/u/MFPDesign Sent from my iPhone On Nov 21, 2017, at 7:46 AM, John Irwin <[email protected]> wrote: Yes. That’s an option as well. I have a pump so I am not terribly worried about the demand. However the difference in price between a residential pendent and something like a Tyco EC-5 is over $10. And I’m looking at over 1,000 of these buggers. John Irwin DynaFire Inc. *From:* Sprinklerforum [mailto: [email protected]] *On Behalf Of * Kyle.Montgomery *Sent:* Tuesday, November 21, 2017 9:44 AM *To:* [email protected] *Subject:* RE: [EXTERNAL] Interesting issue .. residential sprinklers .. 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] <[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. _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
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