Where does the 12" restriction come from?
At 02:47 PM 6/24/2011, you wrote: >If you go with 2 grates to permit air flow, the temperature in the channel >should be closer to the room side of the insulation than that on the other >side of the insulation. I would be concerned if there were no grates. Make >sure you don't use plastic piping, as otherwise there will be an additional >restriction of having a head within 12 inches of the grates. > >Tony > >-----Original Message----- >From: [email protected] >[mailto:[email protected]] On Behalf Of Todd Williams >Sent: June 24, 2011 8:15 AM >To: [email protected] >Subject: Channel in roof joists > >Sorry, forgot title > >At 10:09 AM 6/24/2011, you wrote: >>I am working on a small mixed-use building with commercial space on the >>first floor and an apartment with loft above. Part of the apartment has >>a cathedral ceiling, which needs to have sprinklers on the slope. No >>other options. The roof is framed with 2x10s and they plan to use a >>spray in foam insulation the entire depth of the joists. My thought was >>if they took one joist bay and only put 5" of insulation and create a >>space to run the pipe. Would that be sufficient to prevent pipe from >>freezing? I also thought about putting a small grate at the bottom and >>top of the channel to allow heat to flow into the space. Has anyone >>done anything like that before? Thoughts on weather it would work? Not >>a lot of options and I don't want to go with an antifreeze system >> >>Todd G. Williams, PE >>Fire Protection Design/Consulting >>Stonington, CT >>860.535.2080 >>www.fpdc.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) > >Todd G. Williams, PE >Fire Protection Design/Consulting >Stonington, CT >860.535.2080 >www.fpdc.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) Todd G. Williams, PE Fire Protection Design/Consulting Stonington, CT 860.535.2080 www.fpdc.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)
