Storage Hazard Analysis

NFPA 13 Edition 2025 2022 2019 2016 Commodity Class I Class II Class III Class IV Miscellaneous storage Cartoned nonexpanded Group A plastic Cartoned expanded Group A plastic Nonexpanded unstable Group A plastic Nonexpanded solid unit load Group A plastic Expanded exposed unstable Group A plastic Expanded cartoned unstable Group A plastic Exposed nonexpanded Group A plastic Exposed expanded Group A plastic Rubber tires Roll paper Idle pallets Storage Arrangement Palletized / solid-piled Shelf Back-to-back shelf Single-row rack Double-row rack Multiple-row rack Solid shelf rack Storage Height (ft) Ceiling / Roof Height (ft) Aisle Width (ft) Rack Geometry / Depth Unknown / show all applicable Single-row up to 3 ft deep Single-row over 3 ft to 6 ft deep Double-row rack Multiple-row rack Ceiling System Wet Dry Preaction