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Sketch of the heaviest cast iron girder used on Craven Hill Street.
Public domain scan of an architecture diagram, architectural drawing, building plan, or design, free to use, no copyright restrictions - Picryl description.
Form of roof girder (wrought iron) at Kensington Station under constru...
Public domain scan of a architecture diagram, settlement map, plan, or drawing, free to use, no copyright restrictions - Picryl description.
Moving west side wall to widen subway for third track - 135th Street a...
Public domain image of an industrial building, factory, structure, works, 19th-20th century industrial revolution, free to use, no copyright restrictions - Picryl description