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: Stair A first-floor plan lower horizontal flight
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.
10 count
Count in first-floor lower horizontal flight equality. Source-local only; no accepted physical geometry.
Drawing notation: 10 TREADS @ 10½″ = 8′9″
Count in first-floor lower horizontal flight equality. Source-local only; no accepted physical geometry.
10.5 in
Going in same local printed equality. Source-local only; no accepted physical geometry.
Drawing notation: 10 TREADS @ 10½″ = 8′9″
Going in same local printed equality. Source-local only; no accepted physical geometry.
105 in
Printed equality result; not calculation or accepted run geometry. Source-local only; no accepted physical geometry.
Drawing notation: 10 TREADS @ 10½″ = 8′9″
Printed equality result; not calculation or accepted run geometry. Source-local only; no accepted physical geometry.
36 count
Plan ascent instruction beside lower flight; not count of just the ten-tread flight or whole building. Source-local only; no accepted physical geometry.
Drawing notation: UP 36 RIS
Plan ascent instruction beside lower flight; not count of just the ten-tread flight or whole building. Source-local only; no accepted physical geometry.
46.5 in
Transverse witness through lower plan flight; rail-to-rail clear width unclassified. Source-local only; no accepted physical geometry.
Drawing notation: 3′10½″
Transverse witness through lower plan flight; rail-to-rail clear width unclassified. Source-local only; no accepted physical geometry.
Lower flight printed material note. Source-local only; no accepted physical geometry.
Drawing notation: MARBLE TREADS AND RISERS
Lower flight printed material note. Source-local only; no accepted physical geometry.
Leader to lower horizontal plan handrail; profile remains open. Source-local only; no accepted physical geometry.
Drawing notation: BRONZE HANDRAIL
Leader to lower horizontal plan handrail; profile remains open. Source-local only; no accepted physical geometry.
60 in
Horizontal turn-area witness between left wall reference and lower flight start; endpoint class unaccepted. Source-local only; no accepted physical geometry.
Drawing notation: 5′0″
Horizontal turn-area witness between left wall reference and lower flight start; endpoint class unaccepted. Source-local only; no accepted physical geometry.
Source inventory is separate from the floor filters above. Select one drawing to inspect it; no drawing set is preloaded.