Span Track is often called by its more generic name, case flow track, and is manufactured by Unex. There are several other brands currently available for purchase, including products like Rhino Track. Span track is the best way to turn your existing static pallet system into a dynamic gravity fed pallet rack. Span track is a flow track that can be installed right into your existing racking system using a clip system. As a result, the loads can be evenly supported without adding additional supports. This gravity-based system would be a first-in, first-out system.
Generally, carton flow systems consist of two carton flow racks facing one another with a single conveyor running in between them. The purpose of this configuration is to make the pallet rack, which will be located behind the carton flow, available for restocking of inventory. This frees the conveyors up for staging and removing orders. The conveyors can also be used to clear empty cartons away from the working area.