Single-wall type shoulder beam structure

The invention discloses a single-wall type shoulder beam structure. The single-wall type shoulder beam structure comprises a shoulder beam web plate, an upper cover plate and a lower cover plate, wherein the top end and the bottom end of the shoulder beam web plate are respectively connected with the upper cover plate and the lower cover plate in a welding manner; the single-wall type shoulder beam structure further comprises a stiffening plate; the stiffening plate is arranged at one side of the shoulder beam web plate; the top surface of the stiffening plate is planed and can press against the upper cover plate with the shoulder beam web plate; and the side surface and the bottom surface of the stiffening plate are connected with the shoulder beam web plate by fillet welds. The shoulder beam web plate is not integrally thickened for bearing local concentrated load of a crane beam anymore, so that the steel dosage is greatly reduced. The stiffening plate is additionally arranged, so that a stress plate is fa