moves vertically to open shut loading door 100 as top 112 moves up bottom 114 follows the contour of the bed 20 until bottom 114 engages with frame edge 24 indicating a fully closed loading door 100 as shown in fig1 b 2 b 3 b 4 b when closing loading door 100 with harvested produce in the bed bottom 114 slides out from under the loaded produce with low risk of damage to the loaded produce actuators 160 may be used to push loading door 100 open actuators 160 may be attached to bracket 111 on upper portion 110 of loading door 100 and to chassis 10 or bed 20 such that when actuator 160 is activated loading door 100 moves between the open and closed positions or vice versa actuators 160 may be hydraulic cylinders controlled with a hydraulic system of chassis 10 or may be any actuator capable of moving loading door between closed and open positions in some embodiments actuators may of any suitable type and controlled using vehicle hydraulic pneumatic or electrical systems the various components of loading door 100 and bed 20 may be formed of steel aluminum or any suitable material or alloy used in the construction of such items in some embodiments the inside of hauling bed 20 including an inside surface of loading door 100 may be lined with plastic layer such as hdpe ptfe or may be treated with a surface treatment to facilitate protection or movement of loaded produce in hauling bed 20 including offload through door 22 as shown in fig3 a 3 b in some embodiments pins 134 144 may include bearings or bushings or.