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-floor landing safety tread and steel support
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.
Selected visible source evidence; partial locator review, applies only to depicted assembly.
Drawing notation: TYPICAL DETAIL AT ALL MAIN FLOOR LANDINGS
Selected visible source evidence; partial locator review, applies only to depicted assembly.
4 in
Selected visible source evidence; partial locator review, applies only to depicted assembly.
Drawing notation: SAFETY TREAD 4" WIDE
Selected visible source evidence; partial locator review, applies only to depicted assembly.
Selected visible source evidence; partial locator review, applies only to depicted assembly.
Drawing notation: TO EXTEND FULL LENGTH OF LAST RISER
Selected visible source evidence; partial locator review, applies only to depicted assembly.
4 in
Selected visible source evidence; partial locator review, applies only to depicted assembly.
Drawing notation: 4" NEWEL
Selected visible source evidence; partial locator review, applies only to depicted assembly.
10.5 in
Printed approximate dimension, not an exact stair run.
Drawing notation: 1 TREAD APPROX. 10 1/2"
Printed approximate dimension, not an exact stair run.
0.25 in
Selected visible source evidence; partial locator review, applies only to depicted assembly.
Drawing notation: 1/4" THICK STEEL PLATE LANDING
Selected visible source evidence; partial locator review, applies only to depicted assembly.
10 in
Selected visible source evidence; partial locator review, applies only to depicted assembly.
Drawing notation: 10" CHANNEL
Selected visible source evidence; partial locator review, applies only to depicted assembly.
Selected visible source evidence; partial locator review, applies only to depicted assembly.
Drawing notation: STEEL PLATE
Selected visible source evidence; partial locator review, applies only to depicted assembly.
Approximate tread span uses two vertical newel-post reference lines, one explicitly labelled centreline. It does not establish an exact finished tread run or a room coordinate.
Drawing notation: 1 TREAD APPROX. 10½" / ℄ OF NEWEL POST
Approximate tread span uses two vertical newel-post reference lines, one explicitly labelled centreline. It does not establish an exact finished tread run or a room coordinate.
Calculated from: parallel-img1125-m005
Source inventory is separate from the floor filters above. Select one drawing to inspect it; no drawing set is preloaded.