| 摘要 |
Bridge crane assemblies, trapezoidal strong back beam systems and carriages for bridge crane assemblies are disclosed. According to some embodiments, a bridge crane assembly comprises a trapezoidal beam and a bridge attachable to an underside of the trapezoidal beam. The bridge comprises an attachment means for supporting a lifting device for the crane assembly. At least one guide track is attachable to a support structure and at least one carriage is longitudinally movable along the at least one guide track. Each carriage comprises a pair of spaced apart mounting plates and a plurality of rollers rotatably mounted to the mounting plates in a substantially vertical orientation. An axle extends between and is pivotally secured to the mounting plates. A displacement arm has a first end pivotally coupled to the axle and at least one second end for pivotal connection to the bridge.
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