Fire Flow from Section 507 of the IFC is typically the driver when it comes to large aboveground tanks. This is one issue often forgotten or overlooked in fire protection design.
When determining the adequacy of water supplies, both the sprinkler flow and Fire Flow must be considered. I had a project last year with 8000 gpm for 4 hour duration for fire flow. Yes it was a big honking tank, 2 million gallons. Deluge system flows were at the 7500 gpm mark. Got one right now that's a bit smaller with only 6000 gpm for 4 hours for fire flow. Rule of thumb for estimating tank cost is between .60 cents and $1.00 a gallon depending on location and installation issues. Craig L. Prahl Fire Protection Group Lead CH2MHILL Lockwood Greene 1500 International Drive Spartanburg, SC 29303 Direct - 864.599.4102 Fax - 864.599.8439 CH2MHILL Extension 74102 [email protected] -----Original Message----- From: Sprinklerforum [mailto:[email protected]] On Behalf Of Brad Casterline Sent: Wednesday, August 27, 2014 8:58 PM To: [email protected] Subject: 1, 2 & 3 hour stored water duration requirements Do any of you who have to pin a disclaimer to what you think happen to know if there will be some more thought given to this subject? I've never been anything other than a designer so I have no idea what a half a million gallon above ground water storage tank costs but I bet it's at least 50 grand. Why? How can an automatic system require so much? _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
