We have done that several times for one odd reason or another. One thing to consider it temperature differential from inside to outside the duct. Concensate can be a real problem in some environments, and heat transfer to the sprinkler head in others. Mark at Aero
-----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of [email protected] Sent: Wednesday, June 12, 2013 9:48 AM To: [email protected] Subject: routing sprinkler pipe through a duct Yeah you read that right. I had a query regarding running a 1" sprinkler drop through a duct to provide sprinklers below. The client is afraid that running the line beside the duct will look ugly and doesn't want to do that. The area does have a finished ceiling and the duct is exposed and extends to about 2ft below the ceiling. Essentially the duct is similar to a soffit as far as obstruction rules are concerned. The duct is just over 48" in width. I suggested just spacing the sprinklers beside the run of duct as if you were dealing with a soffit but for some reason the idea of punching through the duct is more attractive. I couldn't find any prohibitive language in NFPA 13 that would prevent this. Anyone know of anything or any text that expressly prohibits this? Craig L. Prahl, CET Fire Protection CH2MHILL Lockwood Greene 1500 International Drive Spartanburg, SC 29304-0491 Direct - 864.599.4102 Fax - 864.599.8439 CH2MHILL Extension 74102 [email protected] _______________________________________________ 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
