Industrial Purpose Edge of Dock Levellers are platforms mounted to the edge of a building wall to assist loading and unloading of trailers in a limited working range and can be operated manually, using an air bag system, or hydraulically. The Levellers can be installed quickly and is easy to operate. The Levellers have reduced lifting force for good operation and safety. The Industrial Purpose Edge of Dock Levellers have open lug-style front lip hinge for good strength.