Main beam-rear beam joint

A vehicle frame structure comprises a right side primary longitudinal member and a left side primary longitudinal member, at least two cross beams extending there between that define in combination a ladder like frame having a forward portion and a rearward portion that correspond with the front and rear of a vehicle. Right and left side rocker members are supported in a spaced relationship with respect to the right and left side primary longitudinal members. A "C" node is disposed between adjacent primary members and rocker members. Right side and left side rear beams have a forward end and an opposed rearward end, an upper surface and an opposed lower surface, and an inwardly facing surface and an opposed outwardly facing surface. Each of the right and left side rear beams are in mechanical communication with its respective right and left side primary longitudinal member and disposed respectively between the right and left side rocker members and the ladder like frame, extending aft of, and in an cantilevered fashion from, the "C" node.