Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Components (hierarchy name)
4. components (objects parts)
5. [components by specific context]
6. architectural elements
7. [structural elements and components for structural elements]
8. structural elements
9. [spanning and projecting structural elements]
10. beams (structural elements)
11. [beams by form]
12. joists

Anotations

Scope note:

Trusslike joists having an open web whose component parts are either hot-rolled structural shapes or cold-formed light-gauge steel shapes. Trusslike joists having an open web whose component parts are either hot-rolled structural shapes or cold-formed light-gauge steel shapes.