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: Boiler-room trench 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.
12 in
Printed horizontal inside-face dimension across trench.
Drawing notation: 12″
Printed horizontal inside-face dimension across trench.
12 in
Printed vertical dimension from upper interior datum to trench floor.
Drawing notation: 12″
Printed vertical dimension from upper interior datum to trench floor.
Numeric value unresolved
Base thickness dimension is not confidently transcribed.
Drawing notation: [vertical base thickness glyph unclear]
Base thickness dimension is not confidently transcribed.
3 ft
Approximate cover-section length; ABOUT retained. Not total trench length.
Drawing notation: SECTIONS ABOUT 3 FT. LONG
Approximate cover-section length; ABOUT retained. Not total trench length.
Two permitted cover surface descriptions; no selection inferred.
Drawing notation: GROOVED OR CHECKERED COVER PLATE
Two permitted cover surface descriptions; no selection inferred.
Printed alternative cover materials remain alternatives, not a selected material.
Drawing notation: TO BE CAST IRON OR ROLLED STEEL
Printed alternative cover materials remain alternatives, not a selected material.
C.I. designation retained for trench curb.
Drawing notation: STOCK C.I. CURB
C.I. designation retained for trench curb.
24 in
Approximate anchor-bolt spacing only; diameter and count unresolved.
Drawing notation: ANCHOR BOLTS ABOUT 24″ ON CENTERS
Approximate anchor-bolt spacing only; diameter and count unresolved.
0.75 in
Nominal pipe designation for rollers, not verified outside diameter.
Drawing notation: ¾″ PIPE ROLLERS
Nominal pipe designation for rollers, not verified outside diameter.
6 in
Spacing in pipe-roller installation note.
Drawing notation: 6″ APART
Spacing in pipe-roller installation note.
2 in
Embedment requirement from roller clause; endpoint geometry not independently traced.
Drawing notation: SET 2″ INTO CONCRETE
Embedment requirement from roller clause; endpoint geometry not independently traced.
1 in
Projection above trench floor in same roller clause.
Drawing notation: AND 1″ ABOVE TRENCH FLOOR
Projection above trench floor in same roller clause.
Finish designation printed at trench lining; thickness unresolved.
Drawing notation: NEAT CEMENT
Finish designation printed at trench lining; thickness unresolved.
Numeric value unresolved
Fraction before NEAT CEMENT not confidently transcribed.
Drawing notation: [fraction unclear] NEAT CEMENT
Fraction before NEAT CEMENT not confidently transcribed.
Source inventory is separate from the floor filters above. Select one drawing to inspect it; no drawing set is preloaded.