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. [supporting and resisting elements]

Anotations

Scope note:

Frameworks of heavy timbers, steel, or reinforced concrete beams laid longitudinally and crossed by similar members laid on them to spread a heavy load over a larger area; includes similar structures used to distribute a concentrated load over the top of the footing.