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: type w409 c4 column composition
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.
3.5 ft
Source audit state: checked-master-crop.
Drawing notation: 3′6″ SPLICE
Calculated from: w409-exterior-c4-lower-splice
2 ft
Source audit state: checked-master-crop.
Drawing notation: 2′0″ SPLICE
Calculated from: w409-exterior-splice-f4-reference
2 ft
Source audit state: checked-master-crop.
Drawing notation: 2′0″ SPLICE
Calculated from: w409-exterior-splice-f6-reference
117.75 ft
Reference/mill-line elevation; not an accepted fabricated cut endpoint or splice-plate bound. Source audit state: calculated-schedule-reference-only.
Drawing notation: 3′6″ SPLICE
Calculated from: frame-second-floor-finish, first-column-c4-splice-lower-offset
139.25 ft
Reference/mill-line elevation; not an accepted fabricated cut endpoint or splice-plate bound. Source audit state: calculated-schedule-reference-only.
Drawing notation: 2′0″ SPLICE
Calculated from: frame-fourth-floor-schedule-finish, first-column-c4-splice-fourth-offset
162.25 ft
Reference/mill-line elevation; not an accepted fabricated cut endpoint or splice-plate bound. Source audit state: calculated-schedule-reference-only.
Drawing notation: 2′0″ SPLICE
Calculated from: frame-sixth-floor-finish, first-column-c4-splice-sixth-offset
Numeric value unresolved
Source audit state: unresolved.
Drawing notation: C4; b
Corner detail is explicitly for C1/C12/C85/C96 and is comparison evidence only. Its dimensions and offsets are not assigned to C4. Source audit state: topology-only; no numerical seating.
Drawing notation: TYPICAL BASE PLATE FOR EXTERIOR COLS.; E; FOR E′ SEE SH. 411
Drawing notation: BASE PLATE FOR COLS 1,12,85 & 96
Numeric value unresolved
Central plate width cannot alone establish whether angle heels/toes project beyond its edges. Source audit state: unresolved; do-not-infer.
Drawing notation: TYPICAL BASE PLATE FOR EXTERIOR COLS.; E; FOR E′ SEE SH. 411
Numeric value unresolved
Source audit state: unresolved.
Drawing notation: TYPICAL BASE PLATE FOR EXTERIOR COLS.; E; FOR E′ SEE SH. 411
6 in
General rule. The applicable floor beam top elevations and beam assignments for C4 remain unresolved. Source audit state: checked-master-crop.
Drawing notation: COVER PLATES TO STOP 6″ ABOVE FLOOR BMS. CAP PLATES AT SPLICES INDICATED BY [double-rule glyph]. DISTANCES OF C. of G. OF FOOTINGS FROM C.L. OF MAIN COLUMN ARE GIVEN BY DIMENSION E AND SUFFIX AT TOP OF SCHEDULE.
C4 lower transition shows a double rule. Thickness and mill-line offset must be resolved before fabricating endpoints. Source audit state: unresolved-or-qualitative.
Drawing notation: COVER PLATES TO STOP 6″ ABOVE FLOOR BMS. CAP PLATES AT SPLICES INDICATED BY [double-rule glyph]. DISTANCES OF C. of G. OF FOOTINGS FROM C.L. OF MAIN COLUMN ARE GIVEN BY DIMENSION E AND SUFFIX AT TOP OF SCHEDULE.
2 ft
Typical same-size 10″→10″ / 12″→12″ splice. C4 lower 3′6″ schedule callout remains an exception; do not overwrite it with this generic detail. Source audit state: checked-master-crop.
Drawing notation: MILL LINE; 2′0″; C.L. FIN. FLOOR; TYPICAL COLUMN SPLICE 10″ TO 10″, 12″ TO 12″
Source audit state: unresolved-or-qualitative.
Drawing notation: COVER PLATES TO STOP 6″ ABOVE FLOOR BMS. CAP PLATES AT SPLICES INDICATED BY [double-rule glyph]. DISTANCES OF C. of G. OF FOOTINGS FROM C.L. OF MAIN COLUMN ARE GIVEN BY DIMENSION E AND SUFFIX AT TOP OF SCHEDULE.
Source audit state: checked-master-crop.
Drawing notation: C4; b
1.25 in
Magnitude only. E is footing-C.G.-to-main-column-C.L. offset; it is not automatically a base-plate-center offset. Source audit state: checked-master-crop.
Drawing notation: b = 1¼″
Drawing notation: COVER PLATES TO STOP 6″ ABOVE FLOOR BMS. CAP PLATES AT SPLICES INDICATED BY [double-rule glyph]. DISTANCES OF C. of G. OF FOOTINGS FROM C.L. OF MAIN COLUMN ARE GIVEN BY DIMENSION E AND SUFFIX AT TOP OF SCHEDULE.
Drawing notation: C4; b
Calculated from: first-column-c4-eccentricity-suffix
Numeric value unresolved
Source audit state: unresolved.
Drawing notation: TYPICAL BASE PLATE FOR EXTERIOR COLS.; E; FOR E′ SEE SH. 411
Calculated from: first-column-c4-footing-eccentricity
Numeric value unresolved
Source audit state: unresolved.
Drawing notation: TYPICAL BASE PLATE FOR EXTERIOR COLS.; E; FOR E′ SEE SH. 411
Calculated from: first-column-c4-footing-eccentricity
Source inventory is separate from the floor filters above. Select one drawing to inspect it; no drawing set is preloaded.