Issue 12 and Volume 144.

RACK STORAGE These are the definitions of a rack and the types of rack storage as found in NFPA 231C, Standard for Rack Storage of Materials. Rack. Any combination of vertical, horizontal, and diagonal members that support stored materials. Some rack structures use solid shelves. Hacks may be fixed, portable, or movable. Loading may be either manual, using lift trucks, stacker cranes, or hand placement; or automatic, using machine-controlled storage and retrieval systems. Single-row racks. Single-row racks are racks with no longitudinal flue space and having a width up to 6 ft. (1.8 m) with aisles at least 3 5 ft. (l .l m) from I other storage. Double-row racks. Double-row racks are two single-row racks placed back to back, having a combined width up to 12 ft. (3.7 m) with aisles at least 3 5 ft. (1.1 m) on each side. Multi row racks. Multi-row racks are racks greater…

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