The majority of product and materials arrive at warehouses in large-quantity truck shipments. The first handling activity is unloading. At most a warehouse, unloading is performed mechanically, using a combination of lift truck, conveyors, and manual processes. When freight is floor stacked in the trailer, the typical procedure is to manually place products on pallets or a conveyor. When inbound product arrives unitized on pallets or in containers, lift truck are used to move products from the vehicle to the dock. A primary benefit of receiving unitized loads is the ability to rapidly unload and release inbound transportation equipment.