Among the unusual loads moved by railroads are large steel coils used to make automobile bodies, appliances and other products. Because of their size (6 to 10' in diameter) and weight, coils are more easily shipped by rail than by truck.
 
Classified as both gondolas and flat cars, coil cars feature a "V"-shaped cradle in place of the usual floor. Adjustable retainers hold the coils in place and a cushion underframe helps prevent end-to-end load shifting. Removable hoods protect the coils from the weather.