Heavyweight refers to early 20th century cars built generally prior to the late 1930s. They were often made of riveted steel construction and large clerestory or arched roofs that tapered or curved at the ends. Heavyweights often had a poured concrete floor resulting in a smooth ride.

• ATSF | Santa Fe Heavyweight Cars
• Baltimore & Ohio Heavyweight Cars
• Burlington Heavyweight Cars
• Canadian National | GTW Heavyweight Cars
• Canadian Pacific Heavyweight Cars

• Chesapeake & Ohio Heavyweight Cars
• Chicago & North Western Heavyweight Cars
• D&RGW Heavyweight Cars
• Illinois Central Heavyweight Cars
• Louisville & Nashville Heavyweight Cars

• Milwaukee Road Heavyweight Cars
• New York Central Heavyweight Cars
• Northern Pacific Heavyweight Cars
• PRR Heavyweight Cars
• Pullman Green Heavyweight Cars

• Pullman Two-Tone Gray Heavyweight Cars
• SOUTHERN Heavyweight Cars
• Southern Pacific Heavyweight Cars
• Union Pacific Heavyweight Cars
• Wabash Heavyweight Cars