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: Lookout Section B-B ladder side flats and shouldered rungs
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
Readable stock width only; thickness fraction withheld independently.
Drawing notation: 2½" × [fraction unresolved] FLAT
Readable stock width only; thickness fraction withheld independently.
Numeric value unresolved
Fraction cannot be securely distinguished in native crop. Do not infer it from neighboring drawings or nominal practice.
Drawing notation: 2½" × [fraction unresolved] FLAT
Fraction cannot be securely distinguished in native crop. Do not infer it from neighboring drawings or nominal practice.
0.75 in
Printed rung size; no explicit diameter sign is visible, so retains generic size rather than claiming circular section.
Drawing notation: ¾" RUNGS
Printed rung size; no explicit diameter sign is visible, so retains generic size rather than claiming circular section.
Fabrication relationship: ladder rungs are shouldered into side flats. No weld, rivet or bolt method inferred.
Drawing notation: RUNGS SHOULDERED INTO FLATS
Fabrication relationship: ladder rungs are shouldered into side flats. No weld, rivet or bolt method inferred.
Source inventory is separate from the floor filters above. Select one drawing to inspect it; no drawing set is preloaded.