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: Fifth-floor vent-over-ceiling branch north of Stair B
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.
2.5 in
Nominal vent notation on upper horizontal branch north of Stair B; not outside diameter.
Drawing notation: 2½″ V
Nominal vent notation on upper horizontal branch north of Stair B; not outside diameter.
Leader directly associates text with the nearby upper branch; ceiling elevation/material and actual installed route remain unknown.
Drawing notation: Vent over Clg.
Leader directly associates text with the nearby upper branch; ceiling elevation/material and actual installed route remain unknown.
Page-relative source relationship only; no historical room or accepted architectural host face inferred.
Drawing notation: Printed branch and Vent over Clg. leader lie above Stair B on this source.
Page-relative source relationship only; no historical room or accepted architectural host face inferred.
Source inventory is separate from the floor filters above. Select one drawing to inspect it; no drawing set is preloaded.