Pallet racking
Pallet racking is a material handling storage aid system designed to store materials on pallets(or "skids"). Although there are many varieties of pallet racking, alltypes allow for the storage of palletized materials in horizontal rowswith multiple levels. All types of pallet racking create some level ofincrease storage density with the least dense being the least expensiveand cost increasing with storage density. Forklift trucks areusually an integral part of any pallet rack system as they are usuallyrequired to place the loaded pallets onto the racks for storage. Palletracks are an essential and ubiquitous element in most modern warehouses,manufacturing facilities, retail centers, and other storage anddistribution facilities.
Selective pallet racking is the most common pallet racking system in use today. Selective pallet racking typically come in one of two configurations: a
roll formed, or clip-in configuration, and a
structural bolt-together configuration.
Roll formed selective rack is most commonly manufactured in a"teardrop" style. The nickname "teardrop" comes from the fact that theholes on the column of the upright are shaped like a teardrop. Palletsthen rest on the horizontal load beams that are held in place bymounting clips. Because the clips on teardrop configurations can bequickly moved, the shelves can be easily adjusted to different heightsto accommodate various load sizes. This is convenient for a warehousethat needs to store a wide variety of product sizes.
Structural pallet rack systems are very similar to roll formedpallet rack systems except the horizontal load beams are attached to theuprights with bolts and have much greater weight-bearing capacity.Also, structural pallet racking can be designed into the structure ofthe building itself, so that the upright columns are simultaneously usedto support the roof of the storage facility, in which case thestructural pallet rack uprights replace the storage building's verticalsupport I-beams. This system is a rack supported building.
Very Narrow Aisle (VNA) is the use of selective pallet racking ina tighter configuration to provide maximum space utilization within astorage facility. These systems typically operate in conjunction withwire-guided or rail-guided reach-truck systems. A wire-guided systemconsists of a wire embedded in the concrete floor that provides trackingfor the reach-truck. A rail-guided system consists of angle iron boltedto the floor down the length of each row.
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