High velocity items often require multiple cartons of storage in order to insure constant availability. One popular method that provides excellent storage density combined with picking efficiency is carton flow rack. This system utilizes a track of wheels or rollers installed at an angle of approximately 3/8" per foot. The product is loaded in the back and flows via gravity to the front, where it is picked.

Most gravity flow racks are 7'-10' deep, permitting multiple cartons or totes of the same product to be stored in each lane on a first in, first out (FIFO) basis.

To further enhance picking efficiency, pick-to-light systems further automate carton flow rack. These systems utilize a series of lights and displays to prompt the operator to pick the correct product in the correct quantity. Pick-to-light systems are normally complimented with barcode technology. A barcode carrying the order processing information is read, and that activity will energize the lights and displays in that zone of picking.

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