Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Furnishings and Equipment (hierarchy name)
4. Transportation Vehicles (hierarchy name)
5. vehicles (transportation)
6. land vehicles
7. [land vehicles by form]
8. guideway vehicles
9. rail guideway vehicles
10. railroad cars
11. freight cars
12. [freight cars by form]
13. flatcars

Anotations

Scope note:

Flatcars with large depressed central sections designed primarily to accommodate intermodal containers; used since the mid-20th century. For flatcars with smaller depressed central portions for oversized loads, in use since the early 20th century, use "depressed center flatcars."