50' ACF Box Car

Prototype Information

American Car and Foundry (ACF) introduced the 50′ exterior post boxcar in the mid-1960s. This design moved the structural side posts to the outside of the steel skin. This change created a smooth interior wall and maximized the car’s cubic capacity. Shippers favored these cars because the flat interior prevented damage to palletized goods and paper rolls. The exterior post design also simplified repairs and reduced the overall weight of the car.

Production of the ACF Precision Design boxcar peaked during the 1970s railcar boom. ACF built thousands of these 50-foot cars for both major railroads and short-line leasing companies. Many featured 10-foot sliding or plug doors to accommodate forklift loading. These cars became a common sight in “Incentive Per Diem” service, wearing bright paint schemes for small railroads. Their rugged construction kept them in mainline service well into the 21st century.