Door hinge

A frame for a motor vehicle is disclosed. The frame includes a longitudinal side member, an A-pillar extending upward from the longitudinal side member and defining a front of the cockpit, a B-pillar extending upwardly and rearwardly from the longitudinal side member rearward of the A-pillar and defining a rear of the cockpit, a door positioned between the A-pillar and the B-pillar, and a hinge assembly attached to the B-pillar. The hinge assembly includes an upright hinge pipe that extends vertically through the door to reinforce the door, the upright hinge pipe having a top end and a bottom end, an upper hinge pipe pivotally attached to the top end of upright hinge pipe and fixedly attached to the B-pillar, and a lower pivot connecting the bottom end of the upright hinge pipe to the B-pillar.