There are a couple of problems to just go with the institutional heads. 1) Dwelling units are communal type which will require more than 4 sprinklers. - Cannot do for 13R 2) Top floor has 4/12 pitch ceilings, no AF is allowed per NFPA to run pnds and hsw's are not listed to throw across the slope. I don't even want to consider a dry system for this attic.
-----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Steve Leyton Sent: Wednesday, November 10, 2010 10:55 AM To: [email protected] Subject: RE: QR sprinklers in R2 occupancy The problem with institutional sprinklers is the cost - what's a Raven, $25 on the street? But if you look at it as a one-time first cost of insurance, it's a cheap upgrade. Concealers will settle, and the gap between plate and ceiling can expand if the sprinklers aren't "touched up". When struck, the plates can be destroyed in one hit; they're as subject to damage as an exposed sprinkler and likely to not be replaced. And get roll-painted once every two years or so if they're still in place. In a frat house, which can't be THAT big a project (100 pendents?), I'd go with institutional sprinklers hands down. Steve Leyton -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of George Church Sent: Wednesday, November 10, 2010 7:06 AM To: [email protected] Subject: RE: QR sprinklers in R2 occupancy Concealed residential would be a far better application and address the mechanical injury concerns- institutionals are going to be way salty and what do you have to mount them to? Jeez, I was joking about the frat, I can see architect's concerns, but are folks really going to try to hang themselves from it? Wouldn't there be easier ways like alcohol poisoning? -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Dewayne Martinez Sent: Wednesday, November 10, 2010 9:56 AM To: [email protected] Subject: RE: QR sprinklers in R2 occupancy Yep it is a frat house. I am trying to convince the arch to go with the concealed type res sprinklers. The only place we would have to use semi-recessed is when throwing across the 4/12 ceilings. Thanks for the information. -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of George Church Sent: Wednesday, November 10, 2010 8:57 AM To: [email protected] Subject: RE: QR sprinklers in R2 occupancy Correct. And if the total # of heads in a dwelling unit is 4, you can QR. Finally, someone treating a fraternity commiserate with the exposure? Or would concealed heads be enough protection from mechanical injury so you could use the residential heads you should use? Threat of someone hanging themselves? Don't forget you'll need .1 for the QRs vrs .05. glc -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Dewayne Martinez Sent: Wednesday, November 10, 2010 8:28 AM To: [email protected] Subject: QR sprinklers in R2 occupancy I have a R2 occupancy that is to be sprinklered per NFPA13R (07ed). The architect wants to use quick response institutional sprinklers. It appears that per 6.7.7.1.3 I can use QR sprinklers inside the dwelling unit only if it meets the definition of a compartment with no more than 4 sprinklers. If the dwelling unit contains multiple rooms (ie: bathroom, kitchen, ect.) then this unit would not qualify because it is not single compartment correct? What if with all the compartments together there would only be 4 sprinklers? Thanks, Dewayne Martinez Design Build Fire Protection New Berlin, WI <http://www.designbuildfire.com/> _______________________________________________ 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) _______________________________________________ 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)
