A reinforced vehicle structure includes a vehicle panel, an elongated structural support member, and a support structure. The vehicle panel includes a first panel surface and a second panel surface, and defines a first opening that extends through the vehicle panel between the first and second panel surfaces. The elongated structural support member supports a portion of the first panel surface of the vehicle panel, and defines a first channel extending along the vehicle panel. The support structure is coupled to the structural support member at least partially within the first channel, includes a mounting structure that is aligned with the first opening in the vehicle panel, and defines a second channel extending transversely to the first channel of the structural support member.