Atlas O also bought the tooling for the Intermountain USRA 40 ft gondola and produce it in their master line. It is a steel frame outside braced car with wood sides.
Weaver did a War-Emergency 52 gon. This is a WWII car with steel structure and wood replica sides. Many roads replaced the wood sides when they could get steel plates after the war.
As mentioned the Atlas Trainman line gondola is a 52 ft steel gon.
