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: Main Street north entrance steps
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.
24.916667 ft
Drawing notation: 23 TREADS @ 1'-1" = 24'-11"
Dimension line spans the tread run in Section C-C.
1.083333 ft
Drawing notation: 23 TREADS @ 1'-1" = 24'-11"
Calculated from: main-north-steps-run, main-north-steps-tread-count
23 count
Drawing notation: 23 TREADS @ 1'-1" = 24'-11"
Numeric value unresolved
Drawing notation: 23 TREADS
No separate printed riser count is securely legible. It is not inferred from tread count or graphic step lines.
Numeric value unresolved
Drawing notation: NOTE: FOR DETAIL OF STEPS SEE SHEET [number uncertain]
No printed riser height is securely legible in the selected region. The separate step-detail sheet was not opened.
83.26 ft
Drawing notation: EL. 83.26
Leader lands at the lower sidewalk/first-step surface in Section C-C; the same value is printed at the entrance centerline in the half plan.
93.24 ft
Drawing notation: ELEV. 93.24
Printed on the upper landing surface in Section C-C. This is 0.01 ft below the 93.25 first-floor datum on IMG_1245 and is retained separately.
Conflicting readings: site-main-first-floor-datum
9.98 ft
This is a difference of two printed decimal elevations, not a directly printed feet-inch rise and not a basis for deriving riser count.
Drawing notation: 23 TREADS @ 1'-1" = 24'-11"; ELEV. 83.26; ELEV. 93.24; 32'-6"; CENTER LINE OF ENTRANCE; HALF PLAN; SECTION C-C
Calculated from: main-north-steps-upper-elevation, main-north-steps-lower-elevation
32.5 ft
Drawing notation: 32'-6"; CENTER LINE OF ENTRANCE; HALF PLAN
Dimension runs from the entrance centerline to the outer stair/parapet boundary on the drawn half.
65 ft
Calculated only because the drawing explicitly labels a HALF PLAN about CENTER LINE OF ENTRANCE. IMG_1245 independently prints two adjacent 32'-6" central segments. This value remains a design-plan width, not a surveyed as-built width.
Drawing notation: 23 TREADS @ 1'-1" = 24'-11"; ELEV. 83.26; ELEV. 93.24; 32'-6"; CENTER LINE OF ENTRANCE; HALF PLAN; SECTION C-C
Calculated from: main-north-steps-half-width
4 ft
Drawing notation: 4'-0"
Section C-C dimension immediately beyond the 24'-11" tread run, from the top tread/run endpoint to the rear landing reference.
Numeric value unresolved
Drawing notation: EL. 83.26
Lower sidewalk/landing surface is drawn, but no dedicated landing-depth dimension has secure endpoints in the selected view.
The stone support under the rail base has a rounded profile, but W-213 does not label it as the step nosing or print a nosing projection/radius.
Drawing notation: HANDRAIL / MAIN ENTRANCE STEPS; FOR LOCATION & ARRANGEMENT SEE SHEET NO. 201
W-213 local fabrication evidence only; no project rail layout or world insertion is established.
The printed 6-inch support depth is not labeled as a riser and must not be substituted for the still-unresolved Main entrance riser height.
Drawing notation: HANDRAIL / MAIN ENTRANCE STEPS; FOR LOCATION & ARRANGEMENT SEE SHEET NO. 201
W-213 local fabrication evidence only; no project rail layout or world insertion is established.
W-213 does not print a Main entrance tread-section dimension. Existing 1'-1" tread going remains sourced to IMG_1244, not W-213.
Drawing notation: HANDRAIL / MAIN ENTRANCE STEPS; FOR LOCATION & ARRANGEMENT SEE SHEET NO. 201
W-213 local fabrication evidence only; no project rail layout or world insertion is established.
IMG_1244's step-detail sheet number remains ambiguous. W-213 resolves the rail detail only and points Sheet 201 to location/arrangement, not to the missing tread/riser/nosing fabrication profile.
Drawing notation: NOTE: FOR DETAIL OF STEPS SEE SHEET [number uncertain]
W-213 local fabrication evidence only; no project rail layout or world insertion is established.
-0.202768 ft
Manual W3 pixel [1907,2245] projected through the existing provisional W3 registration.
Drawing notation: CENTER LINE OF ENTRANCE; Main entrance stair plan; section line A
Targeted W3 Main-entrance crop reviewed after OCR/index and existing stair-package review. Pixel picks are manual plan traces, not printed dimensions.
84.65028 ft
Manual W3 pixel [1907,2245] projected through the existing provisional W3 registration.
Drawing notation: CENTER LINE OF ENTRANCE; Main entrance stair plan; section line A
Targeted W3 Main-entrance crop reviewed after OCR/index and existing stair-package review. Pixel picks are manual plan traces, not printed dimensions.
-0.234744 ft
Manual W3 pixel [1907,2589] projected through the existing provisional W3 registration.
Drawing notation: CENTER LINE OF ENTRANCE; Main entrance stair plan; section line A
Targeted W3 Main-entrance crop reviewed after OCR/index and existing stair-package review. Pixel picks are manual plan traces, not printed dimensions.
109.630881 ft
Manual W3 pixel [1907,2589] projected through the existing provisional W3 registration.
Drawing notation: CENTER LINE OF ENTRANCE; Main entrance stair plan; section line A
Targeted W3 Main-entrance crop reviewed after OCR/index and existing stair-package review. Pixel picks are manual plan traces, not printed dimensions.
-0.197513 ft
Manual W3 pixel [1907,2190] projected through the existing provisional W3 registration.
Drawing notation: CENTER LINE OF ENTRANCE; Main entrance stair plan; section line A
Targeted W3 Main-entrance crop reviewed after OCR/index and existing stair-package review. Pixel picks are manual plan traces, not printed dimensions.
80.54514 ft
Manual W3 pixel [1907,2190] projected through the existing provisional W3 registration.
Drawing notation: CENTER LINE OF ENTRANCE; Main entrance stair plan; section line A
Targeted W3 Main-entrance crop reviewed after OCR/index and existing stair-package review. Pixel picks are manual plan traces, not printed dimensions.
0.063955 ft
Independent plan-trace check; below the 1.25 ft W3 registration uncertainty. The exact printed 24′11″ controls analytical authoring.
Drawing notation: CENTER LINE OF ENTRANCE; Main entrance stair plan; section line A
Targeted W3 Main-entrance crop reviewed after OCR/index and existing stair-package review. Pixel picks are manual plan traces, not printed dimensions.
Calculated from: main-north-w3-top-center-world-x, main-north-w3-top-center-world-z, main-north-w3-bottom-center-world-x, main-north-w3-bottom-center-world-z, main-north-steps-run
0.105143 ft
Independent plan-trace check; below the 1.25 ft W3 registration uncertainty. The exact printed 4′0″ controls analytical authoring.
Drawing notation: CENTER LINE OF ENTRANCE; Main entrance stair plan; section line A
Targeted W3 Main-entrance crop reviewed after OCR/index and existing stair-package review. Pixel picks are manual plan traces, not printed dimensions.
Calculated from: main-north-w3-top-center-world-x, main-north-w3-top-center-world-z, main-north-w3-rear-center-world-x, main-north-w3-rear-center-world-z, main-north-steps-upper-landing-depth
0.668975 ft
Manual W3 lower-edge pixels [1471,2589] and [2342,2589] project to a 65.668975 ft separation. The exact source-derived 65′ width controls only the broad analytical envelope; the flared stair/parapet boundary remains unresolved.
Drawing notation: CENTER LINE OF ENTRANCE; Main entrance stair plan; section line A
Targeted W3 Main-entrance crop reviewed after OCR/index and existing stair-package review. Pixel picks are manual plan traces, not printed dimensions.
Calculated from: main-north-steps-overall-width
-0.031976 ft
Near-zero drift corroborates a north-south run in the W3 building frame; it does not improve the underlying registration review state.
Drawing notation: CENTER LINE OF ENTRANCE; Main entrance stair plan; section line A
Targeted W3 Main-entrance crop reviewed after OCR/index and existing stair-package review. Pixel picks are manual plan traces, not printed dimensions.
Calculated from: main-north-w3-top-center-world-x, main-north-w3-bottom-center-world-x
-0.00128 ratio
Unit vector from the registered top center toward the registered lower center.
Drawing notation: CENTER LINE OF ENTRANCE; Main entrance stair plan; section line A
Targeted W3 Main-entrance crop reviewed after OCR/index and existing stair-package review. Pixel picks are manual plan traces, not printed dimensions.
Calculated from: main-north-w3-top-center-world-x, main-north-w3-top-center-world-z, main-north-w3-bottom-center-world-x, main-north-w3-bottom-center-world-z
0.999999 ratio
Unit vector from the registered top center toward the registered lower center.
Drawing notation: CENTER LINE OF ENTRANCE; Main entrance stair plan; section line A
Targeted W3 Main-entrance crop reviewed after OCR/index and existing stair-package review. Pixel picks are manual plan traces, not printed dimensions.
Calculated from: main-north-w3-top-center-world-x, main-north-w3-top-center-world-z, main-north-w3-bottom-center-world-x, main-north-w3-bottom-center-world-z
204 sheet-number
Native Section C-C crop clearly prints 204. This is a step-detail cross-reference, separate from SEE DETAIL SH. 213 for bronze rail. It does not import dimensions from a companion that has not been examined for this task or establish which W204 photographed region supplies the tread/nosing profile.
Drawing notation: NOTE: FOR DETAIL OF STEPS / SEE SHEET 204
Native Section C-C crop clearly prints 204. This is a step-detail cross-reference, separate from SEE DETAIL SH. 213 for bronze rail. It does not import dimensions from a companion that has not been examined for this task or establish which W204 photographed region supplies the tread/nosing profile.
STONE leader in Section C-C reaches the lower step zone. Stone classification only; species, quarry, surface finish, tread thickness, riser/nosing geometry, coatings and installed condition remain unresolved. Not copied to the six-inch concrete/structural approach slab or all building stairs.
Drawing notation: STONE
STONE leader in Section C-C reaches the lower step zone. Stone classification only; species, quarry, surface finish, tread thickness, riser/nosing geometry, coatings and installed condition remain unresolved. Not copied to the six-inch concrete/structural approach slab or all building stairs.
6 in
Slab below lower approach/first steps, adjoining the indicated VAULT. Not riser height, tread thickness, or a universal stair slab section.
Drawing notation: 6" SLAB
Slab below lower approach/first steps, adjoining the indicated VAULT. Not riser height, tread thickness, or a universal stair slab section.
Numeric value unresolved
Number remains unverified in this crop. No automatic resolution to 213 or invented fabrication dimensions.
Drawing notation: NOTE: FOR DETAIL OF STEPS SEE SHEET [2?4; middle digit uncertain]
Number remains unverified in this crop. No automatic resolution to 213 or invented fabrication dimensions.
Source inventory is separate from the floor filters above. Select one drawing to inspect it; no drawing set is preloaded.