That is what I thought. But NFPA 13, 2007, 8.4.5.3 and the associated commentary seems to permit mixing of "bulb type, solder type, residential or other types", provided they are all "fast response". Or, am I reading it different?
As for the design, can't you do a small room design with minimum 4 heads to combine the design criteria for both QR and RES heads? We do mix heads with different design basis, such as attic heads and standard heads. I know different k factors in the same design area causes problems, but we do mix them. I will be asking the designer to not mix heads in the same compartment, but presently, preparing for questions that's bound to arise. Tony -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Roland Huggins Sent: April 27, 2010 2:18 PM To: [email protected] Subject: Re: Mixing residential/qr heads Unless explicitly allowed, such as QR in mechanical closet, you can NOT mixing different types of sprinklers in one compartment. What would be your method for combining the different design basis for each type of sprinkler? Roland On Apr 26, 2010, at 9:40 PM, A.P.Silva wrote: > Reviewing a drawing where the designer has both residential and quick > response heads in a dwelling unit. A res head is installed where the > coverage is required to be EC. In other areas non-residential QR > sprinklers. > First, I don't think there's a problem mixing heads. Is that correct? > Second, can room design method be used, provided minimum 4 heads are > calcd.? > > Tony > > _______________________________________________ > 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)
