| 摘要 |
A railroad car is particularly constructed for transporting heavy elongated structures such as T and box girder prestressed concrete bridge beams. The railroad car has a frame including a planar top surface with first and second ends and sides, and railroad wheels mounting the frame for movement on rails. A number of lifting bladders are mounted on the top surface for lifting a beam to move it away from the top surface (e.g. to lift it above a number of wooden blocks supporting the beam). Stationarily mounted roller structures are provided adjacent each of the first and second ends, and movable rollers are provided for movement underneath a beam once lifted by the lifting bladders. A winch is also mounted adjacent each of the ends of the railroad car for pulling beams supported by the rollers along the car, and from one car to the next car to facilitate unloading of the beams (as with a crane) at a discharge site without having to move the railroad cars in a string. A number of different sets of lifting bladders may be provided, adapted for use with different types of beams, and where T-girders are transported movable stops may be pivoted into engagement with the sides of a T-girder to prevent it from tipping over.
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