http://www.nfpa.org/assets/files//PDF/Proceedings/Review_of_NFPA_13_Dry_System...-D._O'Connor_et_al.pdf
Check out Page 5...as quoted "4. Listed Software Development: More software development is needed. The one currently available computer program for calculating delivery times, SprinkFDT, has been investigated under UL Subject 2432, which requires that calculated trip times, transit times, times to operating pressure, and water delivery times correlate closely with measured observations of experimental dry-pipe systems. Actual field experience with using the software program and correlating the results to measurements on installed systems corresponding to the program model appear to be limited. Documented and undocumented limitations in the fluid delivery time software used to evaluate water delivery time for this report leaves a void in the design allowance of NPFA 13 to use a listed program. The software is currently limited to tree systems with a single cross main. The software is currently limited to tree systems with a single cross main. (Note: At the December 2006 industry meeting, it was reported that the software was under constant updating and that the most current release has addressed the "crashing problem" and the need to reset the trip time for each iteration.)" January 2007 or so this was published FWIW... -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Thom McMahon Sent: Thursday, March 11, 2010 2:38 PM To: [email protected] Subject: RE: DRY SYSTEMS FOR DUMMIES Sorry but that sounds both Snooty and Arrogant. Have you verified the engineering used for any other products you may spec. by any MFG of fire protection products? How about if this PHD. Happened to be the one who taught you engineering? Would you then accept his work? If it really bothers you since you work for what I assume is a "Reputable Engineering Firm" Write your own program. You could work on it nights, and then you'd have a nice cushion for retirement. If it wasn't by us it can't be any good! I don't pretend to know the math, but I put faith in UL and TYCO and their Insurer's. (Wonder if they are an AIG company?) In which case your tax dollars are what's backing up this program. 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 Not so sound snooty or arrogant All I am saying is I would have a lot more faith in a water delivery time program if it came from a reputable engineering firm rather than a manufacturer of sprinkler equipment. Jim Johnston, P.E. field) _______________________________________________ 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) -- ExchangeDefender Message Security: Click below to verify authenticity http://www.exchangedefender.com/verify.asp?id=o2BN2aAO002020&[email protected] _______________________________________________ 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)
