Abstract: A load bearing structure for a large-scale vehicle includes a base and a return unit. The base includes a mounting seat and a side-skirt connecting member which has a pivot portion pivoted to the mounting seat. The pivot portion includes a first contact portion, a second contact portion and a third contact portion, and under normal conditions, the first contact portion is abutted against the mounting seat. The return unit is located within the pivot portion and pivoted to the mounting seat to keep the side-skirt connecting member staying in the normal conditions. The third contact portion defines a second angle with respect to the top plate, which allows the side-skirt connecting member to pivot in a bidirectional manner when returning to its original position, so that collision between the mounting seat and the side-skirt connecting member can be prevented, and the fatigue problem is consequently solved.