Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Furnishings and Equipment (hierarchy name)
4. Tools and Equipment (hierarchy name)
5. equipment
6. [equipment by process]
7. supporting equipment

Narrower term/s

• aerial ladders
• double-cleat ladders
• extension ladders
• sectional ladders
• trestle ladders
• stepladders[+]
  • step chairs [NP]
  • step stools [NP]
• rope ladders
• hook ladders
• single-cleat ladders

Anotations

Scope note:

Frames, usually of wood or metal, consisting of two side pieces called stiles which are connected by crosspieces, usually round, called rungs; used as a means of climbing up or down.