Rail Cars: dimensions & payload capacity
Inside dimensions and load limits for the boxcars and rail intermodal boxes that carry general freight by rail in North America and Japan.
Interior cargo dimensions in inches; payload is maximum cargo weight, not gross vehicle or gross container weight. Figures are the published specifications of the manufacturer, carrier, or standards body linked on each row, and vary by make, model, and year. Treat them as planning numbers and confirm the specific unit before you load it.
About these numbers
Rail carries freight in volumes road cannot touch, and a single boxcar holds roughly three to four truckloads. North American boxcars are described by plate designation, a clearance diagram that tells a railroad which routes a car can travel without fouling a bridge or tunnel. A Plate C 50 ft boxcar is the general-service standard at about 606 in of inside length, 114 in wide, and 132 in tall, with a 200,000 lb load limit. A Plate F 60 ft high-cube adds two feet of interior height and ten feet of length, and is the car of choice for high-volume, low-density freight such as paper, appliances, and automotive parts. Rail is also where intermodal containers spend much of their life, which is why the 53 ft domestic high cube appears on the shipping containers page rather than here, and why Japan's rail freight network runs on its own 12 ft container: a 5-tonne box sized to fit both a JR flat wagon and the bed of a 4 t truck, so it can be transferred without unstuffing. Load limits on rail cars are much higher than anything road-legal, so on rail you will almost always cube out before you weigh out, which makes the interior height figure the one that matters.
Frequently asked questions
- What are the inside dimensions of a boxcar?
- A standard 50 ft Plate C boxcar has an inside length of about 606 in (50 ft 6 in), a width of 114 in, and a height of 132 in, with a load limit near 200,000 lb. A 60 ft high-cube Plate F car runs about 729 x 114 x 153 in on the same load limit.
- What does 'Plate C' or 'Plate F' mean on a boxcar?
- Plate designations are clearance diagrams. They describe the maximum outline of a car and tell a railroad which routes it can travel without hitting a bridge, tunnel, or platform. Plate C is the general-service standard; Plate F is a taller envelope that allows the high-cube cars, but restricts which lines the car can run on.
- How much can a rail boxcar carry?
- Common general-service boxcars have a load limit of about 200,000 lb (100 tons), roughly four times what a road trailer can legally carry. In practice rail freight almost always fills the space before it reaches the weight limit, so interior height and length matter more than the load limit.
- How big is a 12 ft JR container?
- Japan's domestic rail container measures about 144 x 90 x 89 in internally (3.65 x 2.28 x 2.25 m), holds around 18.7 cubic metres, and is rated for 5,000 kg. It is deliberately sized to transfer between a JR Freight flat wagon and the bed of a 4 t truck without unstuffing.
- How many truckloads fit in one boxcar?
- Roughly three to four. A 60 ft high-cube boxcar holds about 7,350 cubic feet against a 53 ft trailer's 4,000, and carries four times the weight, so for dense freight the ratio is even better in rail's favour.
