This would have been based on NFPA 231, 1974 edition. Class III storage, 25 ft high. Basic density of 0.19 over 4000 but a 140% density multiplier for 25 ft storage. In those days Class III was wood, paper, natural fiber cloth or products thereof with or without pallets. Products contain a limited amount of plastics. Metal bicycles with plastic handles, pedals, seats and tires is an example of a commodity with a limited amount of plastic. 500 hose, not sure about the 600 number.
Bill Brooks -----Original Message----- From: sprinklerforum-boun...@lists.firesprinkler.org [mailto:sprinklerforum-boun...@lists.firesprinkler.org] On Behalf Of craig.pr...@ch2m.com Sent: Monday, March 24, 2014 2:33 PM To: sprinklerforum@lists.firesprinkler.org 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 craig.pr...@ch2m.com _______________________________________________ Sprinklerforum mailing list Sprinklerforum@lists.firesprinkler.org http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org _______________________________________________ Sprinklerforum mailing list Sprinklerforum@lists.firesprinkler.org http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
