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]

Anotations

Scope note:

In architecture and engineering, the divisions, parts, extent, distances, or spaces between supporting elements; for example between the abutments of an arch, the supports of a beam, the piers of a bridge, or the walls carrying a roof or dome.