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: Underground steam-service culvert construction detail
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.
23 in
Horizontal outer-endpoint dimension across concrete culvert; source-local detail only.
Drawing notation: 23″
Horizontal outer-endpoint dimension across concrete culvert; source-local detail only.
18 in
Horizontal inner-endpoint dimension across concrete culvert; not a steam-pipe outside diameter.
Drawing notation: 18″
Horizontal inner-endpoint dimension across concrete culvert; not a steam-pipe outside diameter.
2.5 in
Left segment of printed top dimension chain.
Drawing notation: 2½″
Left segment of printed top dimension chain.
2.5 in
Right segment of printed top dimension chain.
Drawing notation: 2½″
Right segment of printed top dimension chain.
Legible material/designation fragment; preceding word not fully transcribed.
Drawing notation: CONCRETE CULVERT PIPE - PLAIN
Legible material/designation fragment; preceding word not fully transcribed.
Printed leader identifies canvas jacket around covered steam pipe; not a thickness.
Drawing notation: CANVAS JACKET
Printed leader identifies canvas jacket around covered steam pipe; not a thickness.
Underground service saddle/guide/roller clause, distinct from house-tank supports.
Drawing notation: APPROVED CAST IRON SADDLE GUIDE AND ROLLER
Underground service saddle/guide/roller clause, distinct from house-tank supports.
Leader points to bedding beneath culvert; gradation and compaction unspecified.
Drawing notation: GRAVEL
Leader points to bedding beneath culvert; gradation and compaction unspecified.
Numeric value unresolved
Vertical bedding thickness glyph not reliably resolved; remains null.
Drawing notation: [vertical bedding dimension unreadable]
Vertical bedding thickness glyph not reliably resolved; remains null.
Source inventory is separate from the floor filters above. Select one drawing to inspect it; no drawing set is preloaded.