And in 13 there are very specific rules about WHEN the CC's or COINS are required. And the details have changed over the editions. For example 2"x trusses with the top plate flat does not require CC's or COIN in the '02 but I believe in later editions they changed this issue. Just because it's a truss doesn't really mean anything but you need to go over the specifics with great detail.
And no if it's wood it's not necessarily wet, insulation for example! Glu-Lam's concealed, I'd have to look, but 160 cu.ft. come to mind as a possible way out. Note I don't have a modern 13 at my disposal to look this up if this is way off base. And I'm rather sure my 1936 edition in mint condition in my basement wouldn't help here. Also in the original post Brian asks about trusses but only talks about Glu-Lam's. They are NOT the same thing. Could just be confusion on my part cause by the medium of conversation. Chris Cahill -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of George Church Sent: Wednesday, July 28, 2010 5:36 PM To: [email protected] Subject: RE: NFPA-13 & Wood Joist There are many instances where you NEED to use interstital heads- Tyco CC1/CC2 or Viking COINs. look at 13 and the mfr cutsheets. If in open wood trusses with gyp below, you'll need draftcurtains, etc. -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Brian Harris Sent: Wednesday, July 28, 2010 5:09 PM To: [email protected] Subject: NFPA-13 & Wood Joist People smarter than me..... In a nut shell what are requirements of NFPA-13 and wood trusses? I know the exceptions when the ceiling is within 6" of the bottom of the beam and such but in general is it safe to assume "if it's wood it's wet"? The reason I bring this up is because I'm working on a Rec. Center and one wing of the building has Glu-Lam beams that are exposed except in a few areas where there is a GWB ceiling. The engineer wants pendent heads in the ceilings and upright heads above but only in the exit corridors, does that make any sense? Brian Harris Design Engineer First Defense Fire Protection 11957 Ramah Church Road Huntersville NC 28078 [email protected] www.firstdefensefire.com <outbind://80/www.firstdefensefire.com> Ph: 704.948.3506 Fax: 704.948.3507 _______________________________________________ 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)
