Non, single or double, no idea. They didn't state anywhere in their design documents.
The .26/4000 out of 231 is more logical however they noted OH3 on their design data table. Class IV commodities would have made sense. Thanks all for the input. Craig L. Prahl, CET 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: [email protected] [mailto:[email protected]] On Behalf Of Matsuda, Richard Sent: Monday, March 24, 2014 3:09 PM To: [email protected] Subject: RE: 1978 NFPA 13 question Craig, >From 1987 NFPA-231, Class 3 to 20-feet required .19/4000...and about 138% >increase for 25-feet is about .26/4000. Or as Larry suggests, Class 4 to 20-feet is about .26/4000. Ord Haz-3 density was .21/1500 and storage height was limited to 12-feet high so I don't that's the design criteria. Was the preaction system single or double-interlocked? rick city of dallas -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Larry Keeping Sent: Monday, March 24, 2014 1:59 PM To: [email protected] Subject: RE: 1978 NFPA 13 question 0.26 / 4000 looks a lot like Class IV Commodities, palletized or solid pile storage to 20 ft, with ordinary-temperature sprinklers. Check out Figure 14.2.4.1 in your 2007 edition of NFPA 13. The curves haven't changed much since they were originally introduced in NFPA 231, back in day. Larry Keeping, P.Eng. Professional Loss Control 3413 Wolfedale Road, Suite 6 Mississauga, Ontario L5C 1V8 [mailto:[email protected]] On Behalf Of [email protected] Sent: Monday, March 24, 2014 1:33 PM To: [email protected] Subject: 1978 NFPA 13 question I'm looking for the definition of what was covered by an Ordinary Hazard Group 3 classification based on the 1978 NFPA 13. I have a warehouse designed at .26/4000 with 600 gpm hose stream allowance, Ordinary Hazard Group 3. It was a preaction system with area heat detection. (non-heated whse). Trying to figure out what the EOR was basing the design on as far as anticipated type of storage. 25 ft high piled (no racks), 35 ft high ceiling. Craig L. Prahl, CET 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] _______________________________________________ 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
