Not only mfr's requirements, which at least one mfr. gives you specific length within heated space to prevent freezing of water behind/above the dry sprinkler, but also now mandated when added to the 2007 edition of 13. See 8.4.10.1. Looked this up recently after seeing freeze-up of fitting in heated canopy above sprinkler on a -6 degree night. Just like putting dry pendents through the insulated ceiling of a freezer supplied by wet pipe above. The heat in the wet pipe is conducted away through the dry sprinkler. Insulating around the dry sprinkler barrel actually hinders heat getting into the barrel and makes it colder at the water interface.
Dave David A. de Vries, P.E. Firetech Engineering Incorporated --- On Mon, 2/21/11, Scott A. Futrell <[email protected]> wrote: From: Scott A. Futrell <[email protected]> Subject: RE: Dry Sidewalls at back patio To: [email protected] Date: Monday, February 21, 2011, 9:02 PM 12" to 18" or more in Minnesota and other northern states to comply with mfr's requirements. Don't forget, 10-yr inspection requirement. Conceal dry type sprinklers above sheetrock in CPVC and it'll be tough to check them in 10 years without other problems. Better have some design conferences with the architect before they go in... Scott Futrell (763) 425-1001 Office (612) 759-5556 Cell -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Jamie.seidl Sent: Monday, February 21, 2011 5:03 PM To: [email protected]; [email protected] Subject: Re: Dry Sidewalls at back patio We've always concealed them in a soffit or perpendicular wall. As long as the insulation is at the exterior wall you'll be fine. Not really sure where he is coming from with that. You are still within the heated envelope of the building. Jamie Sent from my iPhone On Feb 21, 2011, at 5:53 PM, "Travis Mack, SET" <[email protected]> wrote: > How is everyone installing these heads when req'd? One of my customers just left a meeting with the Tyco Rep and he was told that you were required to have x" of dry barrel exposed (depending on temperatures) in the room, and that it could not be concealed in a soffit or decoshield. We can't see some of these high end apts or condos allowing 4-6" of exposed dry barrel in a unit. What are others in cold climates doing with these situations? > > -- > Please feel free to call if you have any questions or comments. > > Sincerely, > > Travis Mack, SET > MFP Design, LLC > 2508 E Lodgepole Drive > Gilbert, AZ 85298 > Office (480) 505-9271 > Fax (866) 430-6107 > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > > For Technical Assistance, send an email to: [email protected] > > To Unsubscribe, send an email to:[email protected] > (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field)
