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)Original sheet identity has not yet been reconciled.
Extraction: Reviewed · extraction partial. Partial timed visual review: Partial sequential 1000px JPEG65 locator review of public/archive/drawings/complete-upright/IMG_1260.webp after OCR/catalogue and existing reports. Actual clockwise reading rotation 0 degrees. Normalized access-image regions before rotation. Full fine-region extraction remains outstanding. Partial timed visual review: Text-first OCR/queue/prior-package audit only; existing verified properties reused without duplication. Orientation not rechecked where null. Partial timed visual review: Basement, first and second plan selected tread chains. Four crops; first-floor master crop confirms middle chain. Partial timed visual review: Bounded endpoint/profile regions only; no complete-sheet extraction or physical geometry approval. Partial timed visual review: Selected fine closure only; not exhaustive source extraction. Partial timed visual review: Text reuse only; no fresh pixel evidence or exhaustive-review claim.
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Scroll or pinch to inspect this drawing. Archival drawing photograph · Oregon Historical Society research collections.
Open source image separately ↗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.
Partial drawing/detail evidence only; no installed geometry or count established.
Drawing notation: STAIR C — BASEMENT — 1ST & 2ND FLOORS
Partial drawing/detail evidence only; no installed geometry or count established.
Partial drawing/detail evidence only; no installed geometry or count established.
Drawing notation: 1ST FLOOR PLAN
Partial drawing/detail evidence only; no installed geometry or count established.
Partial drawing/detail evidence only; no installed geometry or count established.
Drawing notation: 2ND FLOOR PLAN
Partial drawing/detail evidence only; no installed geometry or count established.
Partial drawing/detail evidence only; no installed geometry or count established.
Drawing notation: BASEMENT FLOOR PLAN
Partial drawing/detail evidence only; no installed geometry or count established.
Partial drawing/detail evidence only; no installed geometry or count established.
Drawing notation: SECTIONS A-A B-B C-C D-D E-E
Partial drawing/detail evidence only; no installed geometry or count established.
Partial drawing/detail evidence only; no installed geometry or count established.
Drawing notation: ELEVATOR [adjacent in floor plans]
Partial drawing/detail evidence only; no installed geometry or count established.
Partial drawing/detail evidence only; no installed geometry or count established.
Drawing notation: Red/orange note/line marks [unreadable]
Partial drawing/detail evidence only; no installed geometry or count established.
Numeric value unresolved
Partial drawing/detail evidence only; no installed geometry or count established.
Drawing notation: Stair/elevator floor interfaces, openings, counts, widths, levels and construction dimensions unresolved
Partial drawing/detail evidence only; no installed geometry or count established.
9 count
Independent IMG_1260 basement vertical upper-flight chain. Resolves prior IMG_1113 null reading; lower 11-tread chain retained in prior package.
Drawing notation: 9 TREADS @ 10½" = 7'-10½"
Independent IMG_1260 basement vertical upper-flight chain. Resolves prior IMG_1113 null reading; lower 11-tread chain retained in prior package.
10.5 in
Printed going; exact tread/nosing construction not inferred.
Drawing notation: 9 TREADS @ 10½" = 7'-10½"
Printed going; exact tread/nosing construction not inferred.
94.5 in
Printed tread-product run; detailed finish/nosing witness classification remains open.
Drawing notation: 9 TREADS @ 10½" = 7'-10½"
Printed tread-product run; detailed finish/nosing witness classification remains open.
10 count
Conventional tread-plus-one candidate; source-local labels 13–22 support but do not substitute for classified landing boundaries.
Drawing notation: 9 printed treads + 1 terminal rise
Conventional tread-plus-one candidate; source-local labels 13–22 support but do not substitute for classified landing boundaries.
Calculated from: stair-companion1013b-img_1260-m001
12 count
Vertical chain in first-floor plan, confirmed with master crop. Lower 10-tread chain retained from IMG_1113.
Drawing notation: 12 TREADS @ 10½" = 10'-6"
Vertical chain in first-floor plan, confirmed with master crop. Lower 10-tread chain retained from IMG_1113.
10.5 in
Middle-flight printed going only.
Drawing notation: 12 TREADS @ 10½" = 10'-6"
Middle-flight printed going only.
126 in
Printed middle-flight run; break/gate arrangement and actual physical endpoint classes still require review.
Drawing notation: 12 TREADS @ 10½" = 10'-6"
Printed middle-flight run; break/gate arrangement and actual physical endpoint classes still require review.
13 count
Candidate allocation, not a printed per-flight riser total.
Drawing notation: 12 printed treads + 1 terminal rise
Candidate allocation, not a printed per-flight riser total.
Calculated from: stair-companion1013b-img_1260-m005
11 count
Upper horizontal return flight in second-floor plan; printed chain legible.
Drawing notation: 11 TREADS @ 10½" = 9'-7½"
Upper horizontal return flight in second-floor plan; printed chain legible.
10.5 in
Upper-flight printed going only.
Drawing notation: 11 TREADS @ 10½" = 9'-7½"
Upper-flight printed going only.
115.5 in
Upper-flight printed product/run, separate from previously verified basement lower-flight identical notation.
Drawing notation: 11 TREADS @ 10½" = 9'-7½"
Upper-flight printed product/run, separate from previously verified basement lower-flight identical notation.
12 count
Candidate tread-plus-one allocation; actual nosing and landing conventions still unresolved.
Drawing notation: 11 printed treads + 1 terminal rise
Candidate tread-plus-one allocation; actual nosing and landing conventions still unresolved.
Calculated from: stair-companion1013b-img_1260-m009
36 count
Candidate 11+13+12 allocation agrees with existing UP36/DOWN36, which does not certify the per-flight allocation. Parent lower tread reading reused, not duplicated.
Drawing notation: (10 + 1) + (12 + 1) + (11 + 1) = 36
Candidate 11+13+12 allocation agrees with existing UP36/DOWN36, which does not certify the per-flight allocation. Parent lower tread reading reused, not duplicated.
Calculated from: stair-closeout1013a-img_1113-m008, stair-companion1013b-img_1260-m008, stair-companion1013b-img_1260-m012
46.5 in
Basement lower horizontal flight transverse witness. Drawn enclosure/flight boundary references; rail-face clearance and wall finish build-up remain unclassified.
Drawing notation: 3′10½″
Basement lower horizontal flight transverse witness. Drawn enclosure/flight boundary references; rail-face clearance and wall finish build-up remain unclassified.
46.5 in
Basement vertical upper flight transverse witness between shaft-side enclosure and outer wall line; not a certified rail-to-rail clear width.
Drawing notation: 3′10½″
Basement vertical upper flight transverse witness between shaft-side enclosure and outer wall line; not a certified rail-to-rail clear width.
49.5 in
Basement right turn-landing horizontal witness from numbered flight junction station to inner drawn wall line. Floor/finish/wall face equivalence and exact landing perimeter remain open.
Drawing notation: 4′1½″
Basement right turn-landing horizontal witness from numbered flight junction station to inner drawn wall line. Floor/finish/wall face equivalence and exact landing perimeter remain open.
Classifies the printed115.5-in run already recorded in stair-closeout1013a-img_1113-m005. Run is a numbered flight projection, not the full enclosure or landing length.
Drawing notation: [11-tread product span is witnessed at numbered stations1 and12; right landing span begins at the12/13 turn junction]
Classifies the printed115.5-in run already recorded in stair-closeout1013a-img_1113-m005. Run is a numbered flight projection, not the full enclosure or landing length.
Calculated from: stair-closeout1013a-img_1113-m005
Page-local progression from visible ascending numbered stations only. No world north/east assignment or endpoint elevation interpolation.
Drawing notation: [numbered lower flight proceeds page-right; upper flight proceeds page-up around the right of Elevator No.2]
Page-local progression from visible ascending numbered stations only. No world north/east assignment or endpoint elevation interpolation.
Local source handedness only; not a surveyed building yaw or registration.
Drawing notation: [left turn from page-right to page-up; counterclockwise in an x-right/y-up paper frame]
Local source handedness only; not a surveyed building yaw or registration.
Numeric value unresolved
No physical clear width adopted; printed strip widths remain separately verified.
Drawing notation: [3′10½″ strip witnesses do not classify rail intrusions or rough/finished wall faces]
No physical clear width adopted; printed strip widths remain separately verified.
46.5 in
First-floor lower up-flight strip width, witnessed through drawn boundary/rail region; no rail-face clearance certified.
Drawing notation: 3′10½″
First-floor lower up-flight strip width, witnessed through drawn boundary/rail region; no rail-face clearance certified.
46.5 in
First-floor vertical middle-flight strip witness; multiple shaft/string/rail lines prevent a finish-face equivalence claim.
Drawing notation: 3′10½″
First-floor vertical middle-flight strip witness; multiple shaft/string/rail lines prevent a finish-face equivalence claim.
60 in
First-floor bottom-right landing horizontal span from lower/middle flight junction to inner drawn wall line. No accepted closed landing polygon.
Drawing notation: 5′0″
First-floor bottom-right landing horizontal span from lower/middle flight junction to inner drawn wall line. No accepted closed landing polygon.
46.5 in
Second-floor upper horizontal return flight transverse witness. Bronze handrail overlaps source edge region; physical clearance remains unresolved.
Drawing notation: 3′10½″
Second-floor upper horizontal return flight transverse witness. Bronze handrail overlaps source edge region; physical clearance remains unresolved.
Numeric value unresolved
Fine upper right landing fraction not certified from this crop; no subtraction from overall chain.
Drawing notation: 4′[fractional inches not certified]
Fine upper right landing fraction not certified from this crop; no subtraction from overall chain.
Links the reviewed C plan strips by source numbering and the existing upper-chain scope. No duplicate tread/riser counts; no accepted cross-floor transform.
Drawing notation: [first-floor lower numbered strip proceeds right; middle strip proceeds up; second-floor upper strip proceeds left through25…36]
Links the reviewed C plan strips by source numbering and the existing upper-chain scope. No duplicate tread/riser counts; no accepted cross-floor transform.
Calculated from: stair-companion1013b-img_1260-m005, stair-companion1013b-img_1260-m009
Source-local turn handedness; both intermediate landing polygon limits and their elevations remain open.
Drawing notation: [two left turns: right→up→left; counterclockwise around Elevator No.2 in the paper x-right/y-up frame]
Source-local turn handedness; both intermediate landing polygon limits and their elevations remain open.
New boundary relationship, using existing material rule rather than repeating bronze as a new universal stair material assignment.
Drawing notation: [BRONZE HANDRAIL leader and rail line occupy shaft-side lower/upper flight boundary regions]
New boundary relationship, using existing material rule rather than repeating bronze as a new universal stair material assignment.
Calculated from: door-20261012a-1122-m005
49.5 in
Upper right second-floor return landing projection from station25-side flight endpoint to inner drawn wall reference. Resolves prior fractional null, not clear width or a closed landing polygon.
Drawing notation: 4′1½″
Upper right second-floor return landing projection from station25-side flight endpoint to inner drawn wall reference. Resolves prior fractional null, not clear width or a closed landing polygon.