BEAM Russian patent published in 2004 - IPC

FIELD: metal structures, particularly girders, or track-supporting structures, specially adapted for cranes.

SUBSTANCE: rolled-steel beam comprises wall and two belts. Beam is formed of four members. Two profiled members are dissymmetrical to each other relative y and x axes. Each profiled member comprises vertical wall, which smoothly passes into horizontal bends along arc radius from top and bottom thereof and then passes into horizontal bends. Tubular member is made as a tube quarter. Walls of symmetric profiled members are connected one to another by hollow rivets with cores inserted into rivets. Bends are connected one to another from top and bottom by tier members of sheet material which in turn are fastened by hollow rivets with cores inserted into rivets. Tube quarters form trays closed from top and bottom by tier members.

EFFECT: reduced material consumption.

1 dwg