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.
f1-f2-stair-a-w221-diagnostic-placementverified · printed
Drawing identity
W221 · STAIR A BASEMENT 1ST & 2ND FLOORSTitle and drawing number read from the inspected IMG_1258 sheet.
IMG_1258 · sheet-W221 · Locate on drawing ↗Drawing notation: STAIR A BASEMENT 1ST & 2ND FLOORS / W221
One complete source and sequential crops from this same photograph were inspected after OCR/index review. Pixel distances were not treated as printed dimensions.
b1-stair-a-w221-diagnostic-placementverified · printed
Basement-to-first total risers
UP 22 R22 count
Total marked rise from the basement plan.
b1-stair-a-w221-diagnostic-placementverified · derived
Basement-to-first floor rise
13 ft13 ft
Shared floor datums; does not establish local finish build-up.
Calculated from: frame-first-floor-finish, env-broadway-B-level
b1-stair-a-w221-diagnostic-placementunreviewed · inferred
Equal-riser analytical height
0.590909 ft (13 ft / 22; inferred)0.590909 ft
Analytical subdivision only. Individual risers were not dimensioned separately on the reviewed regions.
Calculated from: w221-b1-rise, w221-b1-total-risers
stair-a-w221-b1-flight-01verified · printed
Tread count
9 treads9 count
North flight in the basement plan.
stair-a-w221-b1-flight-01verified · printed
Tread going
10 1/2 in0.875 ft
Printed tread going converted to feet.
stair-a-w221-b1-flight-01verified · printed
Horizontal run
7 ft 10 1/2 in7.875 ft
Printed equality on the basement plan.
Calculated from: w221-b1-flight-01-tread-count, w221-b1-flight-01-going
stair-a-w221-b1-flight-02verified · printed
Tread count
11 treads11 count
East flight in the basement plan; the two-flight tread total reconciles with 22 risers.
stair-a-w221-b1-flight-02verified · printed
Tread going
10 1/2 in0.875 ft
Printed tread going converted to feet.
stair-a-w221-b1-flight-02verified · derived
Horizontal run
9 ft 7 1/2 in (11 × 10 1/2 in)9.625 ft
Arithmetic from the printed count and going.
Calculated from: w221-b1-flight-02-tread-count, w221-b1-flight-02-going
f1-f2-stair-a-w221-diagnostic-placementverified · printed
First-to-second total risers
UP 36 R36 count
Total marked rise from the first-floor plan.
IMG_1258 · sheet-W221 · Locate on drawing ↗Drawing notation: 1ST FLOOR PLAN / UP 36 R / 10 TREADS @ 10 1/2" = 8'-9" / 12 TREADS @ 10 1/2" = 10'-6" / MARBLE TREADS AND RISERS / BRONZE HANDRAIL
First-floor Stair A plan around Elevator No. 1.
f1-f2-stair-a-w221-diagnostic-placementverified · derived
First-to-second floor rise
21 ft21 ft
Shared floor datums; does not establish local finish build-up.
IMG_1258 · sheet-W221 · Locate on drawing ↗Drawing notation: 1ST FLOOR PLAN / UP 36 R / 10 TREADS @ 10 1/2" = 8'-9" / 12 TREADS @ 10 1/2" = 10'-6" / MARBLE TREADS AND RISERS / BRONZE HANDRAIL
First-floor Stair A plan around Elevator No. 1.
Calculated from: frame-second-floor-finish, frame-first-floor-finish
f1-f2-stair-a-w221-diagnostic-placementverified · derived
Equal-riser analytical height
7 in (21 ft / 36)0.583333 ft
Exact arithmetic from verified floor datums and the printed total count; local finish thickness remains unresolved.
IMG_1258 · sheet-W221 · Locate on drawing ↗Drawing notation: 1ST FLOOR PLAN / UP 36 R / 10 TREADS @ 10 1/2" = 8'-9" / 12 TREADS @ 10 1/2" = 10'-6" / MARBLE TREADS AND RISERS / BRONZE HANDRAIL
First-floor Stair A plan around Elevator No. 1.
Calculated from: w221-f1-f2-rise, w221-f1-f2-total-risers
stair-a-w221-f1-f2-flight-01verified · printed
Tread count
10 treads10 count
North flight in the first-floor plan.
IMG_1258 · sheet-W221 · Locate on drawing ↗Drawing notation: 1ST FLOOR PLAN / UP 36 R / 10 TREADS @ 10 1/2" = 8'-9" / 12 TREADS @ 10 1/2" = 10'-6" / MARBLE TREADS AND RISERS / BRONZE HANDRAIL
First-floor Stair A plan around Elevator No. 1.
stair-a-w221-f1-f2-flight-01verified · printed
Tread going
10 1/2 in0.875 ft
Printed tread going converted to feet.
IMG_1258 · sheet-W221 · Locate on drawing ↗Drawing notation: 1ST FLOOR PLAN / UP 36 R / 10 TREADS @ 10 1/2" = 8'-9" / 12 TREADS @ 10 1/2" = 10'-6" / MARBLE TREADS AND RISERS / BRONZE HANDRAIL
First-floor Stair A plan around Elevator No. 1.
stair-a-w221-f1-f2-flight-01verified · printed
Horizontal run
8 ft 9 in8.75 ft
Printed equality on the first-floor plan.
IMG_1258 · sheet-W221 · Locate on drawing ↗Drawing notation: 1ST FLOOR PLAN / UP 36 R / 10 TREADS @ 10 1/2" = 8'-9" / 12 TREADS @ 10 1/2" = 10'-6" / MARBLE TREADS AND RISERS / BRONZE HANDRAIL
First-floor Stair A plan around Elevator No. 1.
Calculated from: w221-f1-f2-flight-01-tread-count, w221-f1-f2-flight-01-going
stair-a-w221-f1-f2-flight-02verified · printed
Tread count
12 treads12 count
East flight shown through the first-/second-floor plans.
IMG_1258 · sheet-W221 · Locate on drawing ↗Drawing notation: 1ST FLOOR PLAN / UP 36 R / 10 TREADS @ 10 1/2" = 8'-9" / 12 TREADS @ 10 1/2" = 10'-6" / MARBLE TREADS AND RISERS / BRONZE HANDRAIL
First-floor Stair A plan around Elevator No. 1.
stair-a-w221-f1-f2-flight-02verified · printed
Tread going
10 1/2 in0.875 ft
Printed tread going converted to feet.
IMG_1258 · sheet-W221 · Locate on drawing ↗Drawing notation: 1ST FLOOR PLAN / UP 36 R / 10 TREADS @ 10 1/2" = 8'-9" / 12 TREADS @ 10 1/2" = 10'-6" / MARBLE TREADS AND RISERS / BRONZE HANDRAIL
First-floor Stair A plan around Elevator No. 1.
stair-a-w221-f1-f2-flight-02verified · printed
Horizontal run
10 ft 6 in10.5 ft
Printed equality on the plan.
IMG_1258 · sheet-W221 · Locate on drawing ↗Drawing notation: 1ST FLOOR PLAN / UP 36 R / 10 TREADS @ 10 1/2" = 8'-9" / 12 TREADS @ 10 1/2" = 10'-6" / MARBLE TREADS AND RISERS / BRONZE HANDRAIL
First-floor Stair A plan around Elevator No. 1.
Calculated from: w221-f1-f2-flight-02-tread-count, w221-f1-f2-flight-02-going
stair-a-w221-f1-f2-flight-03verified · printed
Tread count
11 treads11 count
South flight in the second-floor plan.
stair-a-w221-f1-f2-flight-03verified · printed
Tread going
10 1/2 in0.875 ft
Printed tread going converted to feet.
stair-a-w221-f1-f2-flight-03verified · printed
Horizontal run
9 ft 7 1/2 in9.625 ft
Printed equality on the second-floor plan.
Calculated from: w221-f1-f2-flight-03-tread-count, w221-f1-f2-flight-03-going
f1-f2-stair-a-w221-diagnostic-placementunreviewed · traced
Analytical flight display width
4 ft traced display width; not an accepted clear dimension4 ft · estimated uncertainty ±0.5 ft
Scaled only to keep the analytical tread surfaces inside the independently registered Stair A envelopes. No printed width has yet been accepted.
IMG_1258 · sheet-W221 · Locate on drawing ↗Drawing notation: 1ST FLOOR PLAN / UP 36 R / 10 TREADS @ 10 1/2" = 8'-9" / 12 TREADS @ 10 1/2" = 10'-6" / MARBLE TREADS AND RISERS / BRONZE HANDRAIL
First-floor Stair A plan around Elevator No. 1.
IMG_1258 · sheet-W221 · Locate on drawing ↗Drawing notation: SECTION A-A / SECTION C-C / SECTION D-D / SECTION E-E / MARBLE WALLS / MARBLE PANELS / PLASTER CORNICE / BRONZE HANDRAIL / HOSE CAB.
Sections establish the three-storey relationship and finish/component identities; they do not by themselves register the stair in building X/Z.
f1-f2-stair-a-w221-diagnostic-placementunreviewed · derived
Diagnostic X/Z placement uncertainty
2.5 ft conservative trace allowance2.5 ft
The diagnostic is fitted to the existing W3/W4 source traces. This is not an accepted W221 registration.
IMG_1258 · sheet-W221 · Locate on drawing ↗Drawing notation: 1ST FLOOR PLAN / UP 36 R / 10 TREADS @ 10 1/2" = 8'-9" / 12 TREADS @ 10 1/2" = 10'-6" / MARBLE TREADS AND RISERS / BRONZE HANDRAIL
First-floor Stair A plan around Elevator No. 1.
IMG_1258 · sheet-W221 · Locate on drawing ↗Drawing notation: SECTION A-A / SECTION C-C / SECTION D-D / SECTION E-E / MARBLE WALLS / MARBLE PANELS / PLASTER CORNICE / BRONZE HANDRAIL / HOSE CAB.
Sections establish the three-storey relationship and finish/component identities; they do not by themselves register the stair in building X/Z.
Calculated from: f1-stair-a-footprint-trace, f2-stair-a-footprint-trace
stair-a-w221-marble-finish-assemblyverified · printed
Documented finish scope
MARBLE TREADS AND RISERS / MARBLE WALLS / MARBLE PANELSThe callouts establish material categories, not species, thickness, panel joints or complete extents.
IMG_1258 · sheet-W221 · Locate on drawing ↗Drawing notation: 1ST FLOOR PLAN / UP 36 R / 10 TREADS @ 10 1/2" = 8'-9" / 12 TREADS @ 10 1/2" = 10'-6" / MARBLE TREADS AND RISERS / BRONZE HANDRAIL
First-floor Stair A plan around Elevator No. 1.
IMG_1258 · sheet-W221 · Locate on drawing ↗Drawing notation: SECTION A-A / SECTION C-C / SECTION D-D / SECTION E-E / MARBLE WALLS / MARBLE PANELS / PLASTER CORNICE / BRONZE HANDRAIL / HOSE CAB.
Sections establish the three-storey relationship and finish/component identities; they do not by themselves register the stair in building X/Z.
stair-a-w221-bronze-handrail-assemblyverified · printed
Handrail material
BRONZE HANDRAILMaterial callout only.
IMG_1258 · sheet-W221 · Locate on drawing ↗Drawing notation: 1ST FLOOR PLAN / UP 36 R / 10 TREADS @ 10 1/2" = 8'-9" / 12 TREADS @ 10 1/2" = 10'-6" / MARBLE TREADS AND RISERS / BRONZE HANDRAIL
First-floor Stair A plan around Elevator No. 1.
IMG_1258 · sheet-W221 · Locate on drawing ↗Drawing notation: SECTION A-A / SECTION C-C / SECTION D-D / SECTION E-E / MARBLE WALLS / MARBLE PANELS / PLASTER CORNICE / BRONZE HANDRAIL / HOSE CAB.
Sections establish the three-storey relationship and finish/component identities; they do not by themselves register the stair in building X/Z.
stair-a-w221-bronze-handrail-assemblyverified · printed
Maximum handrail-bracket spacing
NOT OVER 6'-0" O.C.6 ft
W221 directs the bracket detail to W228; the 6-foot maximum is retained without generating a bracket count.
stair-a-w221-folding-gateverified · printed
Folding/collapsible gate presence
FOLDING GATE / COLLAPSIBLE GATE detail1 count
One drawn gate assembly/detail identity; installed quantity and exact opening remain unresolved.
IMG_1258 · sheet-W221 · Locate on drawing ↗Drawing notation: SECTION A-A / SECTION C-C / SECTION D-D / SECTION E-E / MARBLE WALLS / MARBLE PANELS / PLASTER CORNICE / BRONZE HANDRAIL / HOSE CAB.
Sections establish the three-storey relationship and finish/component identities; they do not by themselves register the stair in building X/Z.
stair-a-w221-hose-cabinetverified · printed
Hose cabinet presence
HOSE CAB.1 count
Section callout confirms the component; exact storey instance count and dimensions remain unresolved.
IMG_1258 · sheet-W221 · Locate on drawing ↗Drawing notation: 1ST FLOOR PLAN / UP 36 R / 10 TREADS @ 10 1/2" = 8'-9" / 12 TREADS @ 10 1/2" = 10'-6" / MARBLE TREADS AND RISERS / BRONZE HANDRAIL
First-floor Stair A plan around Elevator No. 1.
IMG_1258 · sheet-W221 · Locate on drawing ↗Drawing notation: SECTION A-A / SECTION C-C / SECTION D-D / SECTION E-E / MARBLE WALLS / MARBLE PANELS / PLASTER CORNICE / BRONZE HANDRAIL / HOSE CAB.
Sections establish the three-storey relationship and finish/component identities; they do not by themselves register the stair in building X/Z.
f1-f2-stair-a-w221-diagnostic-placementverified · observed
Accepted W221 building transform
UnresolvedWithheld until W221 is registered and checked against the plan grid, Elevator No. 1 enclosure and multiple independent controls.
IMG_1258 · sheet-W221 · Locate on drawing ↗Drawing notation: 1ST FLOOR PLAN / UP 36 R / 10 TREADS @ 10 1/2" = 8'-9" / 12 TREADS @ 10 1/2" = 10'-6" / MARBLE TREADS AND RISERS / BRONZE HANDRAIL
First-floor Stair A plan around Elevator No. 1.
IMG_1258 · sheet-W221 · Locate on drawing ↗Drawing notation: SECTION A-A / SECTION C-C / SECTION D-D / SECTION E-E / MARBLE WALLS / MARBLE PANELS / PLASTER CORNICE / BRONZE HANDRAIL / HOSE CAB.
Sections establish the three-storey relationship and finish/component identities; they do not by themselves register the stair in building X/Z.
f1-f2-stair-a-w221-diagnostic-placementverified · observed
Accepted physical Stair A geometry
NoneGenerated surfaces are zero-thickness evidence aids, not physical tread, riser, landing, stringer, soffit, rail or slab-opening construction.
IMG_1258 · sheet-W221 · Locate on drawing ↗Drawing notation: 1ST FLOOR PLAN / UP 36 R / 10 TREADS @ 10 1/2" = 8'-9" / 12 TREADS @ 10 1/2" = 10'-6" / MARBLE TREADS AND RISERS / BRONZE HANDRAIL
First-floor Stair A plan around Elevator No. 1.
IMG_1258 · sheet-W221 · Locate on drawing ↗Drawing notation: SECTION A-A / SECTION C-C / SECTION D-D / SECTION E-E / MARBLE WALLS / MARBLE PANELS / PLASTER CORNICE / BRONZE HANDRAIL / HOSE CAB.
Sections establish the three-storey relationship and finish/component identities; they do not by themselves register the stair in building X/Z.
stair-a-w221-f1-f2-flight-01verified · printed
tread count
10 TREADS10 count
Printed tread/going evidence and relative form; physical X/Z flight endpoints, widths, landing and slab cut remain unresolved.
stair-a-w221-f1-f2-flight-01verified · printed
tread going
@ 10 1/2"10.5 in
Printed tread/going evidence and relative form; physical X/Z flight endpoints, widths, landing and slab cut remain unresolved.
stair-a-w221-f1-f2-flight-01verified · printed
horizontal tread run
= 8'-9"8.75 ft
Printed tread/going evidence and relative form; physical X/Z flight endpoints, widths, landing and slab cut remain unresolved.
stair-a-w221-f1-f2-flight-02verified · printed
tread count
12 TREADS12 count
Printed tread/going evidence and relative form; physical X/Z flight endpoints, widths, landing and slab cut remain unresolved.
stair-a-w221-f1-f2-flight-02verified · printed
tread going
@ 10 1/2"10.5 in
Printed tread/going evidence and relative form; physical X/Z flight endpoints, widths, landing and slab cut remain unresolved.
stair-a-w221-f1-f2-flight-02verified · printed
horizontal tread run
= 10'-6"10.5 ft
Printed tread/going evidence and relative form; physical X/Z flight endpoints, widths, landing and slab cut remain unresolved.
stair-a-w221-f1-f2-flight-01verified · printed
whole-stair first-to-second risers
UP 36 R36 count
Printed tread/going evidence and relative form; physical X/Z flight endpoints, widths, landing and slab cut remain unresolved.
stair-a-w221-f1-f2-flight-01unreviewed · inferred
physical clear width
UnresolvedNumeric value unresolved
Printed tread/going evidence and relative form; physical X/Z flight endpoints, widths, landing and slab cut remain unresolved.
stair-a-w221-f1-f2-flight-02unreviewed · inferred
physical clear width
UnresolvedNumeric value unresolved
Printed tread/going evidence and relative form; physical X/Z flight endpoints, widths, landing and slab cut remain unresolved.