The Maxi-Stack® I car is a double-stack car.

Maxi-Stack® I Car

The Maxi-Stack® I car is the mainstay of the United States international double-stack car fleet because it provides the optimum balance between tare weight and capacity. It is a five-unit, articulated double-stack car that can handle containers from 20’ to 40’ long in the well and containers from 40’ to 48’ in the top position.

Greenbrier has actively supplied this car for lanes with a high-concentration of international (ISO) containers.

Maxi-Stack® I Car technical drawing.


Length, Inside 40′-2″
Length, Over Couplers 265′-3.5″
Width, Inside 9′-1.5″
Width, Extreme 10′-2.75″
Clearance AAR Plate H


Light Weight 183,000 lbs
Load Limit/Capacity 124,000 lbs per well
Gross Rail Load 802,000 lbs

Curve Negotiability Radius

Uncoupled 180′
Coupled to Base Car 245′
Coupled to Like Car 248′

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