Bill:
Thanks, but the spray pattern figure actually supports mine. Where I am having the most trouble complying with his demand for a head over each unit is the 5’ x 5’ units. I can’t get the heads spaced over them without breaking the 6’ rule. The spray pattern shows that the pattern develops at least a 4’ throw by the magic 18”, so to my mind, each head spaced over the top of a partition will easily throw to the opposite partition on either side. (Tyco’s spray pattern actually is better than NFPA-13s BTW) I believe the layout I described is the optimum for the application, but this guy is making the contractor (and me) add heads for no reason. John P Crown FSD From: Sprinklerforum [mailto:[email protected]] On Behalf Of [email protected] Sent: Saturday, April 8, 2017 9:09 AM To: sprinklerforum <[email protected]> Subject: Re: Sprinklers over low partitions John, 13, 8.5.5.1 and A.8.5.5.1 may support his position. _____ From: "John Paulsen" <[email protected] <mailto:[email protected]> > To: "sprinklerforum" <[email protected] <mailto:[email protected]> > Sent: Saturday, April 8, 2017 5:49:01 AM Subject: RE: Sprinklers over low partitions Ouch! Kinda makes you want to see him holding the 2 ½” hose by himself with the pumper cranked up huh? From: Sprinklerforum [mailto:[email protected]] On Behalf Of Travis Mack, SET Sent: Saturday, April 8, 2017 5:47 AM To: [email protected] <mailto:[email protected]> Subject: Re: Sprinklers over low partitions Don't feel bad. I still remember the time that I had an NFPA interpretation to back me up on a problem with an AHJ. He told me that the opinion of the technical committee members do not carry any more weight than his own. And that they were wrong. That whole thing led to a jurisdiction requiring all combination standpipes to be 6" minimum, regardless if calculated to be 4" or not. Travis Mack, SET MFP Design, LLC 2508 E Lodgepole Drive Gilbert, AZ 85298 480-505-9271 fax: 866-430-6107 email:[email protected] <mailto:email:[email protected]> http://www.mfpdesign.com <http://www.mfpdesign.com/> https://www.facebook.com/pages/MFP-Design-LLC/92218417692 Send large files to us via: https://www.hightail.com/u/MFPDesign LinkedIn: https://www.linkedin.com/in/travismack On 4/8/2017 2:43 AM, John Paulsen wrote: Thanks John, Normally that would be the approach I would take, but I despair of any hope in being able to educate this particular individual. I’ve tried twice with no success. Sometimes it helps to know I’m not the one who’s nuts! It’s getting harder and harder to tell these days. John P Crown FSD From: Sprinklerforum [mailto:[email protected]] On Behalf Of 321 Sent: Saturday, April 8, 2017 5:39 AM To: [email protected] <mailto:[email protected]> Subject: Re: Sprinklers over low partitions John, Unfortunately....you are dealing with an AHJ that is subjectively making a decision based on his personal ideas relative to Fire Sprinkler spacing and operation. Further...he doesn't realize that the low partitions have no effect upon the Fire Sprinkler operation or discharge characteristics. Your challenge is to educate this person as to the fact that the NFPA Technical Committee takes all factors into account in developing the codes. I would suggest using some of the data from NFPA 13 on obstructions to educate this person as to how the discharge cone develops and that there is no more likelihood of a fire developing in the center of a space than there is along one of these low partitions. Good luck! John W. Farabee VP Fire Sprinkler Division Atlantic Realty and Building, LLC Jupiter, Fl 561-707-5150 Florida License No. FPC16-000106 On Saturday, April 8, 2017 5:14 AM, John Paulsen <[email protected] <mailto:[email protected]> > wrote: We are in the final phases of designing a self-storage facility (Ord Haz, Grp II) that has upright, quick response sprinklers with the deflectors at least 18” above the top of the individual storage unit partitions. In some cases where the units are 5’x5’ or 5’x10’ we have located the sprinklers directly over the top of the low partition. Our design concept is that the sprinkler will throw evenly to each side of the partition and cover the space on either side. This prevents us from have to “stagger” the sprinklers with arm-overs to prevent spacing closer than 6’ apart. We have also provided the manufacturer’s sprinkler spray pattern information to support our design concept. Now the local plan reviewer is telling us that he will not accept this sprinkler arrangement and that each unit has to have sprinkler(s) over them. This is the second project that we have done in this jurisdiction and we ran into a similar issue with the first one that we solved with the sprinkler over the partition arrangement. Now he will not accept this solution, but he doesn’t site any code or handbook reference that we are violating. Is our design concept contrary to the provisions of NFPA-13? A review of NFPA-13 only specifically deals with sprinkler spacing over low partitions in light hazard occupancies, not OH II, so I have no code guidance. Comments would be greatly appreciated. John Paulsen – SET Crown Fire System Design 6282 Seeds Rd. Grove City, OH 43123 P – 614-782-2438 F – 614-782-2374 C – 614-348-8206 _______________________________________________ Sprinklerforum mailing list [email protected] <mailto:[email protected]> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org _______________________________________________ Sprinklerforum mailing list [email protected] <mailto:[email protected]> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org _______________________________________________ Sprinklerforum mailing list [email protected] <mailto:[email protected]> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
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