Superstructure

A superstructure for mounting upon a ground engaging structure of a working machine includes a cab structure for housing a human operator of the working machine; a chassis structure providing a base for the cab structure; and a frame including a tubular body, the tubular body comprising two legs and a cross member interposed between the legs, wherein the cross member is at a non-zero angle to both legs. The frame is connected to the cab structure proximate an upper extent of the frame and the chassis structure proximate a lower extent the frame so as to support a portion of the cab structure.