evidence-key · w6-broadway-f4-mark-12Modeling: not-modeled
W-6 Broadway opening key 4/12
Research representation: none. Architectural checks: pending.
Fourth floor · Original mark: 4/12
Broadway/page-right source-space key; no accepted opening geometry or world transform.
Source relationships · not a verified physical connection
- annotates source candidate (observed, verified): Room 422 east-facade opening candidate
3 recorded properties
Still to extract or check- A printed B02/B05 identifier on IMG_1231 itself or a formal drawing legend for the split-circle syntax
- Accepted W-6 to Broadway elevation metric registration with independent held-out horizontal residual
- Exact W-6 grid/column names at the page-right 4/11 and 4/14 opening axes
- Comparable masonry, frame, sash and clear-opening boundary classifications across W-6, W207 and IMG_1231
- Exterior stone face, wall thickness, opening depth and physical host equivalence
- Independent as-built or survey check