To add further comment to Joe's observation, a necessary part of this is the access port in the duct to inspect the head. Enough overspray prevents head from operating. This is even with direct flame impingement the leaves the overspray black and bubbled.
Yours, Bruce V. -------------- Original message ---------------------- From: Joe Hankins <[EMAIL PROTECTED]> > Having spent the first 15 years of my career with FM in the heart of > furniture company, I dealt with lots of spray booths and spray booth fires. > > The purpose of the sprinkler in the exhaust stack is to control fires in > overspray that accumulates on the inside of the stack. As there are > typically joints in the stack that can open up when exposed to a fire, > you need the sprinklers to prevent flames coming from inside the stack > impinging on the roof deck. To do this, you need to put the sprinkler > at or just below the level of the roof deck. This is the way it's been > done for years. > > Joe > > > > Randy Knutson wrote: > > Dewayne, > > I had an AHJ pull the Uniform Mechanical code once and told me I had to have > > the sprinkler within 36" of the top of the exhaust stack. The exhaust duct > > stood 60" above the roof. I had to put a little A.F. loop in with a sprig-up > > in the exhaust duct. I don't have the UMC and can't remember the section. > > I just remember the sting. > > > > Randy > > > > -----Original Message----- > > From: [EMAIL PROTECTED] > > [mailto:[EMAIL PROTECTED] On Behalf Of Dewayne > > Martinez > > Sent: Thursday, March 13, 2008 8:11 AM > > To: [email protected] > > Subject: Sprinklers in paint booth exhaust ducts > > > > Anyone know where to find design information on the placement of heads > > in paint booth exhaust ducts? > > I can't seem to find it in NFPA 33. > > Thanks, > > Dewayne > > _______________________________________________ > > Sprinklerforum mailing list > > [email protected] > > http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum > > > > To Unsubscribe, send an email to:[EMAIL PROTECTED] > > (Put the word unsubscribe in the subject field) > > > > _______________________________________________ > > Sprinklerforum mailing list > > [email protected] > > http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum > > > > To Unsubscribe, send an email to:[EMAIL PROTECTED] > > (Put the word unsubscribe in the subject field) > > > > > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum > > To Unsubscribe, send an email to:[EMAIL PROTECTED] > (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field)
