What is defined as a single car that is 40 feet or shorter over the pulling faces of the couplers?

A single car that is 40 feet or shorter over the pulling faces of the couplers is categorized as a short car. This terminology is used widely in the context of rail transportation and equipment handling to specify the size and type of rail cars. Short cars are typically lighter and can be utilized in various service scenarios, including switching operations and as part of unit trains.

The definition aligns with industry standards, where dimensions are critical for determining the compatibility of cars with different rail systems, load distribution, and overall operational efficiency. Understanding these categorizations is fundamental for professionals in the field, as they can significantly affect logistics, loading strategies, and train configurations.