Large-sized trussed-beam type crane detaching type single shear connection girder structure

A decomposed type single shear truss structure of large truss type crane is composed of a plurality of unit sections, which is characterized in that each unit section is composed of four sheet type independent unit trusses A and four sheet type independent unit trusses B, each independent unit truss A comprises a main chord (2), the upper ends of the main chord (2) at same side are provided with one lower slope web rod (9) extended downwards to same direction, the lower ends are both provided with an upper slope web rod (5) extended upwards to same direction, and the middles are both provided with one horizontal web rod (8). The ends of all web rods are fixedly connected at a connecting plate (7), each truss B comprises an upper slope web rod (1), a horizontal web rod (3) and a lower slope web rod (4) at one plane, with one end crossed at the same side of a connecting plate (7-1) and fixedly connected with the plate, the upper and lower web rods (1, 4) are referred with the horizontal web rod (3) to extend si