Single-wall type shoulder beam structure

The utility model discloses a single-wall type shoulder beam structure which comprises a shoulder beam web, an upper cover plate, a lower cover plate and reinforcement plates, wherein the top end and the bottom end of the shoulder beam web are in welding connection with the upper cover plate and the lower cover plate respectively; the reinforcement plates are arranged on one side of the shoulder beam web; the top surfaces of the reinforcement plates are planed, and push against the upper cover plate with the shoulder beam web together; and the side faces and the bottom surfaces of the reinforcement plates are connected with the shoulder beam web by fillet welds. The shoulder beam web is not required to be thickened integrally in order to bear partial concentrated load of a crane beam, so that the steel quantity is saved greatly; the reinforcement plates are additionally adopted, so that a stressed plate is far thicker than the original stressed plate with only the shoulder beam web within a partial pressure-b