If you're going to provide a new tank and pump why not just include the rack system in the demand and be done with it?
Are you going to have dual fire loops and run-ins, one to the rack riser system and one to the overhead sprinkler systems? Has anyone done a cost analysis on this proposal versus everything coming off a bigger tank and pump set? Duplicity can at times not only increase cost for installation but also for on-going maintenance. And ultimately it's up to the AHJ or Underwriter to offer an opinion if it's outside of the normal realm of NFPA. I'd also check for the owner's sake how the local water department bills for sprinkler system tie-ins to the municipal water supply. Some charge differently for a tank supply only versus a sprinkler system. This could be another long term expense if tied into the municipal system instead of the tank for the rack sprinklers. Craig L. Prahl, CET Fire Protection Group Mechanical Department CH2MHILL Lockwood Greene 1500 International Drive PO Box 491, Spartanburg, SC 29304-0491 Direct - 864.599.4102 Fax - 864.599.8439 [EMAIL PROTECTED] http://www.ch2m.com -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Todd Williams - FPDC Sent: Tuesday, May 13, 2008 7:15 AM To: [email protected] Subject: Split system I am working on a chemical storage warehouse. The decision has been made to protect it with sprinklers alone and not foam. The total water demand for ceiling, in-rack and hose is around 3300 gpm. The public supply alone cannot provide this volume. The proposal has been made to feed the ceiling sprinklers from a pump and tank and the in-racks and hose from the public. Hydraulically that can work. Is there any restriction or problem with this type of arrangement? The only cross connection between the tank and the public would be in the fill line. To me, this would be a more reliable system that feeding the entire system from a single pump and tank. This is the first of what could be 3 or 4 buildings protected similarly. While we are at it. This tank will be in the 200,000 gallon range. In light of ever-increasing fuel prices, any good suggestions on decreasing heating costs? Todd G. Williams, PE Fire Protection Design/Consulting Stonington, Connecticut www.fpdc.com 860.535.2080 _______________________________________________ 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)
