Micah,
For you to even begin to apply that, they would have to be segregated storage racks no more than 12 ft high. If you are talking about just storing the plastics in the 25 ft racks but only to 12 ft high, that doesn’t work. See section 5.6.1.2 (2016 edition) Todd G Williams, PE Fire Protection Design/Consulting Stonington, CT 860-535-2080 (tel:860-535-2080) (ofc) 860-554-7054 (tel:860-554-7054) (fax) 860-608-4559 (tel:860-608-4559) (cell) > > On Apr 29, 2021 at 10:38 AM, <Micah Davis via Sprinklerforum > (mailto:[email protected])> wrote: > > > > I have a warehouse that will store some exposed unexpanded Group A plastic > (sheet plastic in rolls). The rest of the storage will be Class III > commodities. All stored on racks. Building height is 35 ft and with racks up > to 25 ft. NFPA 13 - 17.2.1.3 states, "For storage of Group A plastics between > 5 ft and 12 ft in height, the installation requirements for extra hazard > systems shall apply." We have the ability in this case to stipulate that the > plastic storage be limited to 12 ft or less in height (I understand all of > the human behavior questions that arise about warehouse workers actually > abiding by this). My question is, does 17.2.1.3 give instruction only for > installation guidance (sprinkler spacing, obstructions, etc.) or does this > allow me to use AT LEAST extra hazard design criteria for protection of the > low-piled plastic? Specifically, if the plastic is limited to 12 ft, could > the rest of the warehouse be protected with a protection scheme adequate for > the Class III comm odities and if that scheme exceeds the demands of extra > hazard densities, the plastic is considered protected? My gut is that the > section refers only to installation procedures and I am stuck with the > requirements of 17.2.1.4, 17.2.2, or 17.2.3 for design criteria even is the > plastic storage is limited to 12 ft. Thank you, Micah Davis Dynamic Fire > Designs, LLC _______________________________________________ Sprinklerforum > mailing list [email protected] > (mailto:[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
