The statement in 13 includes a pointer to what as in my understanding was the original intent, “on the same branch line leading back to the main”. My understanding of this was the intent was to prevent having say a 80’ wide room as a remote area with a couple k11.2s then a couple k8.0 etc so that the increased node pressures from friction loss didn’t increase the discharge as you worked your way back to the main, squeezing pipe size.
Mike Morey CFPS 3229 • NICET S.E.T. 123677 Project Manager • Fire Protection Group Shambaugh & Son, LP an EMCOR Company 7614 Opportunity Drive • Fort Wayne, IN • 46825 direct 260.487.7824 / cell 260.417.0625 / fax 260.487.7991 email [email protected] [Image] ________________________________ From: Sprinklerforum <[email protected]> on behalf of John Denhardt via Sprinklerforum <[email protected]> Sent: Friday, October 29, 2021 10:45:38 AM To: [email protected] <[email protected]> Cc: John Denhardt <[email protected]> Subject: Re: Mixing of K-Factors in self-storage facilities BE ADVISED - This email originated outside EMCOR. What K factor sprinkler are you trying to use? John August Denhardt, P.E. Vice-President Engineering and Technical Services American Fire Sprinkler Association 301-343-1457 > On Oct 29, 2021, at 10:09 AM, Sean Lockyer via Sprinklerforum > <[email protected]> wrote: > > NFPA 13 generally discourages the use of mixing K-Factors in a system; > however, the mixing of K-Factors is allowed in certain circumstances, namely > in section 23.4.4.9.3 where it allows such use for small rooms and > enclosures. In a self-storage facility, the small 5' x 5' storage units would > not be considered "small rooms" as they are not light hazard (once again, per > the strict definition as layed out in chapter 3). However, would you be able > to consider the small units as enclosures since they are completely separate > rooms from the other, larger self-storage units ? > > Sean Lockyer > Project Designer 6817 N. Orange > Blossom Trail > Cell 386-337-1078 Orlando, Florida > 32810 > [email protected] Phone: 407-816-9101 > > https://urldefense.com/v3/__http://www.AITLifeSafety.com__;!!FaxH778!Oy_jgPeRIlLfLOnvlyy99bOFdv8SJpLnbP2diyr4688tcb9BtnCFIJaqhbTElesa$ > > > > > > > > > > > > > > > > > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > https://urldefense.com/v3/__http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org__;!!FaxH778!Oy_jgPeRIlLfLOnvlyy99bOFdv8SJpLnbP2diyr4688tcb9BtnCFIJaqhfoF0X8A$ _______________________________________________ Sprinklerforum mailing list [email protected] https://urldefense.com/v3/__http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org__;!!FaxH778!Oy_jgPeRIlLfLOnvlyy99bOFdv8SJpLnbP2diyr4688tcb9BtnCFIJaqhfoF0X8A$ This message is for the named person's use only. It may contain confidential, proprietary or legally privileged information. No confidentiality or privilege is waived or lost by any mistransmission. If you receive this message in error, please immediately delete it and all copies of it from your system, destroy any hard copies of it and notify the sender. You must not, directly or indirectly, use, disclose, distribute, print, or copy any part of this message if you are not the intended recipient. _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
