Ladies/Gents: We run into this situation ever so often and, if memory serves, we have relied more than once on "water-curtain" test data/documentation from the Los Angeles County (or) City Fire Department - Fire Prevention Division. You might want to check it out as I think it has supporting documentation that we have used successfully in the past with various Fire Marshals/AHJ's. Best to All- Jerry [email protected]_ (mailto:[email protected]) Jerry D. Watts, MSFPE President & Co-Founder ACCENT FIRE ENGINEERING INT'L. Ltd.* Santa Fe Seattle San Diego Phoenix San Antonio (800) 503.1961 nationwide *Licensed Architects - Fire Protection Engineers/NICET Designers/NICET Inspectors/Forensics/Fire Investigators: AZ CA CO NM NV NY TX UT KS MD MS In a message dated 5/18/2017 10:17:41 A.M. Mountain Daylight Time, [email protected] writes:
Todd, I would be very careful. Is this a required separation or occupancy wall and is it required to be fire-rated? If so, as far as I know there has never been any full-scale testing of sprinklers as an equivalency to hourly ratings of wall openings (except for window sprinklers). I know it is in the IBC, loosely, but to evaluate it as an engineered equivalency is not realistic. System out of service for any reason? No protection. Tread carefully if a wall rating is required. If not, it’s up to you and your ingenuity. Scott Office: (763) 425-1001 x 2 Cell: (612) 759-5556 From: Sprinklerforum [mailto:[email protected]] On Behalf Of [email protected] Sent: Thursday, May 18, 2017 6:54 AM To: Sprinkler Forum <[email protected]> Subject: Water curtain for wall opening I have been asked to look at a situation in an industrial occupancy where there are two garage -door size horizontal openings in a wall. The openings cannot realistically be closed, so they are asking about a water curtain. I have a couple of questions: First, NFPA 13 discusses water curtains around vertical openings but not horizontal, from what i found. Am i missing something? Second, the ceiling is approximately 12 ft above the top of the openings. The sprinklers need to be 12" from the deck max. Will that vertical distance create an issue with the water curtain performance. Todd G Williams, PE Fire Protection Design/Consulting Stonington, CT _860-535-2080_ (tel:860-535-2080) (ofc) _860-553-3553_ (tel:860-553-3553) (fax) _860-608-4559_ (tel:860-608-4559) (cell) _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
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