they're constructed of steel sections riveted together to form girders

The Trainz SKU for this item is P11543110

Trainz Product Id: 11542671

This is a Miller Engineering 67811 All Scales Animated Multi-Graphic Vertical Neon Sign Kit with 6 Overlays Downtown Series #2 - Left - Large

Specifications: Machined Billet Aluminum

American Flyer XA15A660 Different Engines Red Flanged Pull Driver Wheel LastUpdated_20263007034305 they're constructed of steel sectionsCheck the photos for a detailed look at this item. Condition: Excellent (C 7) Operational Status: Functional Original Box: No Manufacturer: American Flyer Model Number: XA15A660 Variation: Original Category 1: Parts Category 2: S Postwar Parts We are unable to provide parts lookup service or fitment assistance. The Trainz SKU for this item is P12372775. Trainz Product Id: 12372775