And you would apply that at the point of connection. From: Kyle.Montgomery Sent: Thursday, March 27, 2025 12:43 PM To: Discussion list on issues relating to automatic fire sprinklers <[email protected]> Subject: RE: [External][Sprinklerforum] Re: Dry Sprinkler K-Factor
28.2.4.10.3 states “flow from a sprinkler shall be calculated using the nominal K-factor except that the manufacturer’s adjusted K-factors shall be utilized for dry-type sprinklers.” You are supposed to use what is on the data sheet for that particular sprinkler and length. For example, here is one from a Tyco data sheet: [cid:[email protected]] Let me know if this comes through. Kyle Montgomery [cid:[email protected]] Pre-Construction Manager Aero Automatic Sprinkler Co. 21605 N. Central Ave. Phoenix, AZ 85024 Direct: 623.580.7820 Cell: 602.763.4736 [email protected]<mailto:[email protected]> From: Mike Stewart <[email protected]<mailto:[email protected]>> Sent: Wednesday, March 26, 2025 12:47 PM To: [email protected]<mailto:[email protected]> Cc: [email protected]<mailto:[email protected]> Subject: [External][Sprinklerforum] Re: Dry Sprinkler K-Factor Since the connection point has a large opening and the “K Factor” has to do with the smaller opening size of the fire sprinkler itself then the “K Factor” should be added at the fire sprinkler head itself. Mike Stewart (843) 490-8366 On Mar 26, 2025, at 12:44 PM, Fpdcdesign <[email protected]<mailto:[email protected]>> wrote: The K factor has to do with discharge, so it should be applied at the sprinkler, unless noted otherwise by the manufacturer. If they are to be taken at the POC, then the K factor would be modified per length of sprinkler in the literature. Kind of like how Autosprink does it. Todd Williams Fire Protection Design/Consulting Stonington, CT 860-608-4559 On Mar 26, 2025 at 12:20 PM, <Travis Mack<mailto:[email protected]>> wrote: Is the k-factor for a dry sprinkler to be applied at the sprinkler, or at the point of connection to the piping network? I understand things like the Victaulic Dry Flex sprinkler have the k-factor at the POC. What about all other dry sprinklers? POC or sprinkler orifice? Travis Mack, SET M.E.P.CAD | Instructor / Support 181 N. Arroyo Grande Blvd. #105 I Henderson, NV 89074 www.mepcad.com<http://www.mepcad.com/> | 303-923-8215 Email: [email protected]<mailto:[email protected]> AutoSPRINK | AutoSPRINK FAB | AutoSPRINK RVT | AlarmCAD Academy of Fire Sprinkler Technology | Director, Engineering Technology 101 S Main Street, Suite 001, Decatur, IL 62523 _________________________________________________________ SprinklerForum mailing list: https://lists.firesprinkler.org/list/sprinklerforum.lists.firesprinkler.org To unsubscribe send an email to [email protected]<mailto:[email protected]> _________________________________________________________ SprinklerForum mailing list: https://lists.firesprinkler.org/list/sprinklerforum.lists.firesprinkler.org To unsubscribe send an email to [email protected]<mailto:[email protected]>
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