Abstract: In a stub sill open top railroad car, such as a gondola or hopper car particularly adapted for coal service, a corner fitting or casting is provided at each end of the car joining the top chord extending along each side of the car with the end chord, the latter extending transversely of the car at the upper ends thereof. The corner casting includes projections which extend into the top and end chords so as to facilitate making an integral (i.e., welded) connection between the chords and an adjacent end diagonal member. In one embodiment, the casting includes a downwardly extending portion which is received within and to which the diagonal is welded, while in another embodiment, a connection plate is utilized to secure the end diagonals to the corner casting.