Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Object Groupings and Systems (hierarchy name)
4. systems (equipment)
5. [systems by function]
6. conveying systems
7. vertical conveying systems

Anotations

Scope note:

Devices consisting of a powerdriven endless belt provided with steps or platforms and handholds for the transportation of persons in a vertical position through successive floors or levels of a building or structure.