B12 · Reference edition 2026.11
Drop-spine boxes — Layout and sequence
A drop-spine structure provides a supported opening route. Interior clearances and hinge behaviour should be described independently.
Scope and purpose
Place the relevant elements in a visible order before completing the record. A diagram should distinguish position from sequence and should preserve the orientation used in the written notes. Review the example for a practical way to make the relationship explicit.
Working notes
This collection describes enclosure forms, access routes and documentation practices for paper-based material. It is intended for reading and planning, not for directing treatment of fragile objects. Fold diagrams and record examples are original illustrations with no associated collection or accession data. Material descriptions distinguish observed features from documented properties. Decisions about a real object, its condition and its environment require the relevant professional judgement.
Practical example
Show closed, opening and supported-open views of the same reference structure.
| Reference record | Interpretation |
|---|---|
| B12 | Drop-spine boxes |
| Scope and purpose | A drop-spine structure provides a supported opening route. Interior clearances and hinge behaviour should be described independently. |
| Limits and interpretation | Do not force the lid or spine of an actual enclosure to match an illustration. |
Review checklist
Identify the starting condition; mark the order or orientation; check that labels in the figure match the accompanying table.