Interesting point, but there is arguably no more nor less fire load at the perimeter of a residential compartment where the windows occur, so the hazard group is the same ... in theory.
Steve Leyton Protection Design & Consulting San Diego, CA From: Jeff Hewitt [mailto:[email protected]] Sent: Thursday, July 15, 2010 12:26 PM To: Steve Leyton; [email protected] Subject: RE: Small Orifice Sprinklers in Water Curtain Steve, Just thinking out loud, and do not have a copy of 13 in front of me.... Aren't closely spaced sprinklers and water curtains listed outside of the occupancy classification section? I am not certain that a water curtain configuration can be classified as "Light Hazard", and if it cannot, then your argument loses validity. Jeff Hewitt, PE, SET, SFPE (Professional Member) Corporate Engineer Bi-State Fire Protection Corporation 241 Hughes Lane St. Charles, MO 63301 636-946-0011 636-946-5172 (fax) 314-574-6989 (cell) Fire Sprinklers Save lives. Can You Live Without Them? -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Steve Leyton Sent: Thursday, July 15, 2010 2:12 PM To: [email protected] Subject: Small Orifice Sprinklers in Water Curtain Scenario: 3-story Light Hazard (Residential) occupancy, fully sprinklered per 13. Situation: Exterior exit stairs are too close to glazed openings in exterior walls and 45-minute window protection is required (from inside out) for several 2'x3' fixed windows on all three floors. Challenge: Can't use window sprinklers because exterior walls are bearing. Am proposing to use water curtain provisions of the building code, and furnish 3 GPM per lineal foot per 13. Question: Since the windows are only 2' wide, and there are up to 3 windows in a cluster, we will have sprinklers at 4' apart in several areas and will be provided a baffle of some sort. I can easily hit my minimum flow rate with small orifice sprinklers and do not see any restriction in 13 regarding orifice size in a water curtain. Since it's all Light Hazard, can anyone think of a reason why we can't use 4.2K pendents? Steve Leyton PROTECTION DESIGN & CONSULTING 2851 Camino del Rio South, Suite 400 San Diego, CA 92108 ------------------------------------------------------------- Ph: 858.751.2930 - ext. 102 Fax: 858.751.2933 Cell: 619.972.5696 _______________________________________________ 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) __________ Information from ESET NOD32 Antivirus, version of virus signature database 5282 (20100715) __________ The message was checked by ESET NOD32 Antivirus. http://www.eset.com _______________________________________________ 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)
