B31 · Reference edition 2026.11
Grain and fold direction — Definition and boundaries
The relationship between material direction and fold direction belongs in the construction record. Keep it visible when the outline is rotated.
Scope and purpose
Start by separating the named concept from adjacent concepts. Use the observation below to identify the question the record is intended to answer. Read the caution before applying the example. A definition is useful only when another reader can tell what falls outside it.
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
Place a direction arrow beside the flat pattern and repeat it on the assembly sketch.
| Reference record | Interpretation |
|---|---|
| B31 | Grain and fold direction |
| Scope and purpose | The relationship between material direction and fold direction belongs in the construction record. Keep it visible when the outline is rotated. |
| Limits and interpretation | A diagram cannot replace testing and judgement for a specific material. |
Review checklist
Write a one-sentence scope statement; identify a neighbouring concept; record what the example does not establish.