W-209 Broadway library window-head special condition
Research representation: none. Architectural checks: pending.
Seventh floor · Original mark: SECTION THRU LIBRARY WINDOW HEAD
Source relationships · not a verified physical connection
- not yet applicable to (observed, verified): W207 opening above fourth-floor finish line
15 recorded properties
Still to extract or check- Unique plan room and elevation-bay instance
- All secure local head-detail dimensions and endpoint classifications
- Overall exterior-to-interior wall thickness and layer chain
- Masonry-opening, frame, sash and visible-envelope boundary correspondence
- World X and horizontal bay station
- Slab edge, ceiling and interior finish interfaces
- Relationship to W-207 beyond both being Broadway upper-story drawings