You are protecting the floor with sprinklers not the deck. Ceiling clouds in themselves are not mentioned in the standard. The committee in their infinite wisdom decided 12" is an acceptable distance down for a deflector. Not counting combustible concealed spaces (which you said this is not) it doesn't matter what is going on above the sprinklers. Fly with who, the AHJ, not a chance they will win this one. You may choose not to fight if they give you grief but that doesn't make them right. I'll turn it around where does it say you need them above. Sprinklers are within 12" and then you treat obstructions in the various zones (<18" and >18"). It's the obstruction part that drives above and below in typical cloud ceilings. If you are at 12" in this case where is the obstruction?
Chris Cahill, P.E. Fire Protection Engineer Sentry Fire Protection, Inc. 763-658-4483 763-658-4921 fax Email: [email protected] Mail: P.O. Box 69 Waverly, MN 55390 Location: 4439 Hwy 12 SW Waverly, MN 55390 -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Brian Harris Sent: Wednesday, August 12, 2009 10:20 AM To: [email protected] Subject: RE: Armstrong Optima Capz Panels Why wouldn't these be treated like ceiling clouds with heads above and below? It's open on both sides of the panel (parallel to the joist) to deck, how can I get away without protecting the deck? I like your idea way better than mine but I'm not sure it will fly. Brian Harris FDFP INC. -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Chris Cahill Sent: Wednesday, August 12, 2009 11:09 AM To: [email protected] Subject: RE: Armstrong Optima Capz Panels I though Jamie answered this Tues. at 2:47 pm. "Unobstructed construction? Heads 12" down maybe?" That was my thought. No above and below. You'll have to see if you can hide the pipe above, if not exposed. Arch. will have work with you if he/she/it wants the pipe covered and you can't fit it above for whatever reason. Chris Cahill, P.E. Fire Protection Engineer Sentry Fire Protection, Inc. 763-658-4483 763-658-4921 fax Email: [email protected] Mail: P.O. Box 69 Waverly, MN 55390 Location: 4439 Hwy 12 SW Waverly, MN 55390 -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Brian Harris Sent: Wednesday, August 12, 2009 9:56 AM To: [email protected] Subject: RE: Armstrong Optima Capz Panels Standard school construction, CMU walls, Bar Joist, Metal decking. Brian Harris FDFP INC. -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Seidl Jamie D. Sent: Wednesday, August 12, 2009 10:53 AM To: [email protected] Subject: RE: Armstrong Optima Capz Panels What is your construction type? -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Brian Harris Sent: Wednesday, August 12, 2009 10:33 AM To: [email protected] Subject: FW: Armstrong Optima Capz Panels Anybody ?? Regards, Brian Harris FDFP INC. _____ From: Brian Harris [mailto:[email protected]] Sent: Tuesday, August 11, 2009 3:29 PM To: '[email protected]' Subject: Armstrong Optima Capz Panels Has anyone ever come across these Armstrong Optima Capz Panels? For product information you can Google "optima capz". Basically they are an acoustical panel that are mounted within 6" of the roof deck in an "open" type ceiling installation. My question is since it is open to deck all around these panels wouldn't you need heads both above and below the panels? With there only being 6" max space above these panels and taking into account the top chord of the joist it only leaves you with 3" or so to run the pipe, add upright heads, and arm-over's to catch the pendants....... Is there some code section that addresses situations like this? Regards, <http://www.firstdefensefire.com/> E-mail message checked by Spyware Doctor (6.0.1.441) Database version: 6.13030 http://www.pctools.com/en/spyware-doctor-antivirus/ _______________________________________________ Sprinklerforum mailing list http://lists.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) E-mail message checked by Spyware Doctor (6.0.1.441) Database version: 6.13030 http://www.pctools.com/en/spyware-doctor-antivirus/ E-mail message checked by Spyware Doctor (6.0.1.441) Database version: 6.13030 http://www.pctools.com/en/spyware-doctor-antivirus/ _______________________________________________ Sprinklerforum mailing list http://lists.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 http://lists.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) E-mail message checked by Spyware Doctor (6.0.1.441) Database version: 6.13030 http://www.pctools.com/en/spyware-doctor-antivirus/ E-mail message checked by Spyware Doctor (6.0.1.441) Database version: 6.13030 http://www.pctools.com/en/spyware-doctor-antivirus/ _______________________________________________ Sprinklerforum mailing list http://lists.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 http://lists.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)
