Patent ID: 8079632

Claim:
A door structure on a side body of a vehicle, the side body including front and rear doors, the door structure comprising: a reinforcing member horizontally extending from a leading end connected to a leading reinforce-installation fitting, to a tail end connected to a tail reinforce-installation fitting; an upper vertical beam extending from an upper end connected to a head-installation fitting, to a lower end connected to the tail reinforce-installation fitting; a lower vertical beam inclined relative to the upper vertical beam and extending from an upper end connected to the tail reinforce-installation fitting, to a lower end connected to a base-installation fitting; and a horizontal beam positioned below the reinforcing member and extending from a leading end connected to a leading beam-installation fitting, to a tail end connected to a tail beam-installation fitting, such that the horizontal beam intersects the lower vertical beam; wherein an auxiliary beam is further provided such that it is connected between the leading beam-installation fitting and the base-installation fitting.