Every dimension belongs to an object and a drawing. Original room numbers, object marks, printed values and source regions stay together—even when the answer is unresolved.
464 of 464 photographs have extraction records, containing 27,517 properties. Initial image review is not exhaustive extraction: 0 photographs have passed the full-region check. 66 numbered sheets are reconciled. Modeling and architectural registration are separate work; these counts do not establish a complete building.
Download the structured register (JSON)Object: W409 seventh-floor schedule reference
Printed values, calculations, image traces and observed counts are different kinds of evidence. “Verified” applies to the specific reading—not to the whole room or model.
173.75 ft
Generic W409 schedule reference. The Main-side 171.75 and Stair E W226 173.25 values remain separate regional controls.
Drawing notation: 6TH · 13'-6" · 7TH
Calculated from: w409-level-6-elevation, w409-sixth-to-seventh-interval
Source inventory is separate from the floor filters above. Select one drawing to inspect it; no drawing set is preloaded.