A walking floor trailer uses a series of hydraulically-controlled slats that move forward and back to methodically unload one item or portion of the load at a time. A belt trailer uses a conveyor belt system that continuously rotates to unload commodities.  A walking floor can work in two directions – it can load and unload – whereas a belt trailer operates in only one direction: unloading. A walking floor trailer can also facilitate other kinds of loads, such as pallets, in addition to bulk commodities. Belt trailers are built to accommodate only bulk commodities.  The belt trailer can unload much faster than the walking floor trailer. But the design of a walking floor can increase trailer capacity by approximately 20 percent more than that of a belt trailer. Ultimately, your choice of the unloading system will be determined by the way you intend to use it.