Overhead cranes

Details Overhead cranes Overhead cranes

B - Operations, Transporting

66

C

212/4

B66C 7/00 (2006.01)

Patent

CA 1059070

ABSTRACT OF THE DISCLOSURE In overhead cranes of the kind including a box girder fabricated of elongate plates and torsionally loaded by a trolley running on three rails respectively at three corners of the box girder, the structure of the box girder is usually such that flanges project from the corners thereof and prevent proper support of the rails in optimim corner positions in alignment with the walls of the girder. This problem is now solved by providing a rail with an elongate flange and securing the rail and flange respectively to marginal portions of a pair of adjacent plates of the box girder. In this way the rail can be secured in optimum position at the corner of the girder and forms with the flange a member which encloses the corner flange and serves as a stiffener or reinforcement for the corner. In a preferred construction the rail and flange are the respective arms of a generally V-section elongate member enclosing the corner of the girder.

277033

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