W409 seventh-floor schedule reference
Research representation: none. Architectural checks: pending.
Seventh floor · Original mark: 7TH
W409 arithmetic schedule reference EL. 173.75. This does not replace Main-side EL. 171.75 or Stair E W226 EL. 173.25.
1 recorded properties
Still to extract or check- Regional floor boundaries
- Transition geometry
- Floor build-up