SIDE SILL FOR A VEHICLE BODY

A vehicle frame structure includes an elongated side sill having an internal space defined by an upper wall, a lower wall, an outer lateral side wall, and an inner lateral side wall. The internal space is partitioned by a vertical rib and a horizontal rib, the perpendicularly crossed vertical and horizontal ribs connecting inside faces of the upper, lower, outer and inner walls. The vertical rib separates the side sill into an outer lateral portion and an inner lateral portion. The outer lateral portion is defined by an outer lateral section of each of the upper and lower wall and the outer side wall. The inner lateral portion is defined by an inner lateral section of each of the upper and lower wall and the inner side wall. The outer lateral portion of the side sill is thicker than the inner lateral portion of the side sill.