When duct is blowing conditioned air it is common to see discoloration on the head, and a brown stain on the floor below about the diameter of a softball. Does UL's investigation of heads include corrosion of head when it is damp?
bv ----- Original Message ----- From: "Richard Lindner" <[email protected]> To: [email protected] Sent: Wednesday, June 12, 2013 10:21:39 AM Subject: Re: routing sprinkler pipe through a duct There is a fitting for ductwork to deal with the issue when pipes pass through the ductwork. Looks like a teardrop constructed of sheetmetal and is provided to stop issues such as the whistling. Also, sealing the ductwork openings is a necessity. On Wed, Jun 12, 2013 at 1:12 PM, Tom Wellen <[email protected]>wrote: > I hear of one instance where this was done where after the installation, a > whistle developed from the moving air. > > Tom Wellen > > > On Jun 12, 2013, at 11:48 AM, <[email protected]> wrote: > > > 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 > _______________________________________________ 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
