Heavy capacity flatcars are cars designed to carry more than 100 short tons (90.72 t; 89.29 long tons).They often have more than the typical North American standard of four axles (one two-axle truck at each end), and may have a depressed center to handle excess-height loads as well as two trucks of three axles each (one at each end) or four trucks (two at each end) of two axles each, connected