Truck Actuated Dock leveler for 28″Pit or recessed is the Fully Automatic Loading Ramp, so no dock attendant needed. The truck backs against twin actuating arms (bumpers) pushing carriage back (dock and trailer door must be raised). As carriage goes back, deck goes up. When the carriage bumpers contact dock, the deck floats down to rest on trailer. When truck pulls out, deck returns to level supported position automatically. Details: Uniform Capacity 20,000 lbs; 55,000 psi high strength checker plate deck;12” long lip (extends 6 ½” into truck); toeguards on each side; service range of 14” above and 8” below dock; (2) molded bumpers – 5”W x 16”H x 6”D; and lift by-pass for safety.Available in 6’W x 6’L( Standard 28″ Deep Pit) Unit, 6’W x 8’L Unit, 6’W x 8’6″L Unit and 6’W x 10’L Unit.