closed finite landing polygon in canonical X/Z
METAL LANDINGNumeric value unresolved
material/class known, boundary and support dimensions missing. Candidate only; no accepted physical flight, landing, shaft or floor cut.
Drawing notation: METAL LANDING
material/class known, boundary and support dimensions missing; reused evidence: reused stair-e-w226-upper-stories-first.json; no image reopened
Drawing notation: METAL LANDING
material/class known, boundary and support dimensions missing; reused evidence: reused stair-w228-typical-details-first.json; type construction only, not site placement