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Extra Hazard Density

Question asked by on Sep 30, 2017

I have a 2hr rated flammable liquid storage room in an ESFR warehouse that is less than 500sf. Chapter 16 in NFPA 30 leads me to 0.3/3000...5 gal metal containers of IB. But I also have 5 gal plastic containers of IIIB which may be extra hazard group II?? If so, can I pick the 0.3/5000 and use the 0.3 density for the entire room? Storage is 8' or less with a 11' 6" deck. The higher the density the larger the containment...