Rail Spanners

The Army is seeking rail spanners that meet specific requirements. The spanners must be at least 72 inches long and 24 inches wide, with a minimum weight of 20,000 pounds per single spanner. The rated capacity should be no more than 50% of the failure strength, and the failure strength is determined by the amount of weight that causes permanent deformation of the aluminum. The top surface of the spanner should have high-traction rungs, and the structural tubes should be at least 3 inches by 3 inches. Each spanner must have a reinforced kickplate and a heavy-duty stub toe. The spanners must also be etched with the part number and capacity. Some key points to consider include: • Minimum size and weight requirements • Rated capacity and failure strength • Structural tube size and material • High-traction rungs and spacing • Reinforced kickplate and stub toe • Etching requirements for part number and capacity