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 · basement to first floor · W221 diagnostic assembly
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.
22 count
Total marked rise from the basement plan.
Drawing notation: BASEMENT FLOOR PLAN / UP 22 R / 9 TREADS @ 10 1/2" = 7'-10 1/2" / MARBLE TREADS AND RISERS / BRONZE HANDRAIL
Basement Stair A plan around Elevator No. 1.
13 ft
Shared floor datums; does not establish local finish build-up.
Drawing notation: BASEMENT FLOOR PLAN / UP 22 R / 9 TREADS @ 10 1/2" = 7'-10 1/2" / MARBLE TREADS AND RISERS / BRONZE HANDRAIL
Basement Stair A plan around Elevator No. 1.
Calculated from: frame-first-floor-finish, env-broadway-B-level
0.590909 ft
Analytical subdivision only. Individual risers were not dimensioned separately on the reviewed regions.
Drawing notation: BASEMENT FLOOR PLAN / UP 22 R / 9 TREADS @ 10 1/2" = 7'-10 1/2" / MARBLE TREADS AND RISERS / BRONZE HANDRAIL
Basement Stair A plan around Elevator No. 1.
Calculated from: w221-b1-rise, w221-b1-total-risers
Source inventory is separate from the floor filters above. Select one drawing to inspect it; no drawing set is preloaded.