If the baffles are 8 ft. long how wide are they? The real question should be are only three levels of sprinklers adequate for light hazard?
Ron Fletcher Aero Automatic Sprinkler Phoenix, AZ -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Todd Williams - work Sent: Monday, August 27, 2007 9:10 AM To: [email protected] Subject: Obstruction issue I am working on a project with a rather complex ceiling system. The roof is steel deck, below the steel are some T shaped baffles and below that is a fabric ceiling which is stepped with vertical openings. (This is for a church. You sometimes find similar looking ceilings in theaters, sans fabric). My proposal is to install sprinklers at the deck, under the baffles and beneath the fabric. I have two questions: First, the T shaped baffles are 8 feet wide with a member perpendicular near the mid point. one side is 4'-2" and the other 3'-10" . three feet away, there a three foot wide baffle and three feet from that, another T. My instinct tells me to put a sprinkler on both sides of the vertical member. The engineer is looking at everything closely, because he basically showed sprinkler below the fabric and that is it (and is now in the hot seat). Any good justification I can use for adding the sprinkler (assuming it is questioned)? Secondly, NFPA 13 (2002) section 11.2.3.1.8(6) says that sprinklers below obstructions do not need to be included in the hydraulic calculations. I am having a hard time accepting this as well because I'm not sure the potential fire demand will only include sprinklers at the deck. Actually, sprinklers at the deck may be so obstructed that very little will effectively get to the fire area. I would think it be more than likely a combination of sprinklers above and below. Any thoughts? Todd G. Williams, PE Fire Protection Design/Consulting Stonington, Connecticut 860-535-2080 www.fpdc.com _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field)
