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. circulation elements
8. ramps (circulation elements)

Anotations

Scope note:

Inclined surfaces designed to facilitate launching of an object, such as missiles or rockets; boats into the water; vehicles or goods onto boats, trains or trucks; targets for trap shooting; or the launching of any other object.