| 摘要 |
Disclosed is a crane for installing a girder on the upper portion of a pier to construct a bridge. The crane includes: a crane girder constituting the body of the crane; a plurality of legs longitudinally fixed to the crane girder, and including a second leg disposed in the central portion of the crane girder; and a rotation member disposed at the lower side of the second leg to rotate the crane. The rotation member includes: a rotating auxiliary leg disposed at either side of the lower portion of the second leg; a wheel assembly disposed at the lower end of the rotating auxiliary leg; and a ring-shaped rail coupled to the lower portion of the wheel assembly to guide the rotation of the wheel assembly. Thus, the crane can be turned particularly 180°, such that a traveling direction of the crane can be reversed. Furthermore, the dismantling and reinstallation of the crane are unnecessary and thus the cost of using same can be reduced, thereby improving economic performance and safety. |
