First thing, when referencing tables or chapters/sections, please provide the year edition and name of the document you're referencing. I'm assuming NFPA 30.
OH 3 is like 0.195 gpm/sf over 2000 sf area. That's not suitable for any type of appreciable combustible liquid storage. So that may be a problem. Also you need to know the characteristics of the material being stored. Much in the Class IIIB family tend to be hydrocarbons (non-miscible) and water only sprinklers have limited effect on pool fires of those types of materials. Know the material being stored, ask for SDS. You also need to know the container types, metal, plastic or other and will there be storage of empty containers? You didn't state the total quantity to be stored. How will the material be stored, on floor, on racks, stacked? Yes, with sprinklers per Table 9.6.1 there is no upper limit, but for a non-sprinklered bldg. you can only have 13,200 gallons per CONTROL AREA and now you're getting into building code segregated and size limited areas within the bldg. Table 12.6.2 is for UNPROTECTED as in non-sprinklered. For a non-sprinklered whse you have limits. You also need to be looking at local building codes for additional requirements related to the storage and handling of combustible and flammable liquids. Craig L. Prahl Fire Protection Group Lead/SME 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 James Crawford Sent: Wednesday, March 30, 2016 1:15 PM To: [email protected] Subject: Class IIIB Liquid Storage A client has a building that is protected with an Ordinary Hazard Group 3 system. They want to store class IIIB combustible liquids in 16 gal and 55 gal drums. Table 9.6.1 gives the MAQ for a IIIB as 13,200 gal with note 1 & 4 and note 4 states that the quantities are not limited if the building is equipped with an automatic sprinkler system installed in accordance with NFPA #13. This seems to imply that they could store an unlimited amount of class IIIB liquids. Table 12.6.2.2 gives the MAQ as 55,000 gal if the building is protected with a sprinkler system designed for class 4 commodities to 20'. Am I missing something Thank you James Crawford Phaser Fire Protection Ltd. Phone 604-888-0318 Fax 604-888-4732 Cel 604-790-0938 Email [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
