Everything you need to know is in the ICC Legacy report including why you need a pony wall.
Rahe Loftin ----- Original Message ----- From: "Cliff Whitfield" [[email protected]] Sent: 03/21/2009 05:04 PM EST To: <[email protected]> Subject: RE: Window Sprinklers Thom, Great info. Thanks. Cliff -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Thom McMahon Sent: Saturday, March 21, 2009 4:00 PM To: [email protected] Subject: RE: Window Sprinklers There is a test white paper on these heads on the ICC web site, that I looked at several years ago. Basically these heads are to keep the glass from reaching a temp that would cause it to crack or fail. That temp is higher than the rating for these heads. The heads are exposed to the same heat sources as are the glass, Convection conduction and radiant heat. They don't need to activate at all if the fire is controlled by the control mode sprinklers, but they need to operate if the sprinkler system is overwhelmed or the fire source is located close to the glass. They need to maintain the hour rating of the separation. Both sides of the glass is the preferred installation unless you can guarantee which side will have the fire. As you know the convection will not usually be a large factor with windows this far below the ceilings, but radiant heat and conduction, as well as heat forced down by the ceiling sprinklers when they operate can put the glass at risk. Timely is relative. They only need to activate before the glass fails, or gets hot enough for the water to cause the glass to fail. That is why the placement rules are so specific. Thom McMahon, SET Firetech, Inc. 2560 Copper Ridge Dr P.O. Box 882136 Steamboat Springs, CO 80488 Tel: 970-879-7952 Fax: 970-879-7926 -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Cliff Whitfield Sent: Saturday, March 21, 2009 11:58 AM To: [email protected] Subject: RE: Window Sprinklers Thom, That brings up another issue I've been wondering about. I am being required to use these on both sides of the windows. I have not studied the details yet but if the top of the window is at 7' AFF and the ceiling is at 12', how do the heads activate in a timely fashion? That could be an issue on the inside of this area. The bigger problem I have is that this window (about 140 lf in one direction) is for an overlook into a restoration hangar and the roof on the outside of the window is probably 20' above the top of the window. What is the chance that those heads will ever activate? I'm sure the guys at Tyco did their research and the EoR knows exactly what he is doing but something in my mind wants to throw up a red flag. It just goes against what I think I understand about sprinklers. Cliff _______________________________________________ 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) _______________________________________________ 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)
