Machine-room metal trap door and frame
Research representation: none. Architectural checks: pending.
Floor assignment pending
3 recorded properties
Still to extract or check- Trap plate gauge, hinges, frame profile, fixing details and installed trap identity.
- Installed occurrence, governing revision, companion applicability and source-to-building registration remain unresolved.
- Fine fractions, profiles, gauges, fixings, finish extents and every unreviewed region remain partial; no accepted physical geometry.