USC&G Benchmark C135 1947 on the DuSable Bridge in Chicago. Field Notes for Civil Engineers and Bridge Crews.

https://frametheworks.com/2026/03/31/uscg-benchmark-c135-1947-on-the-dusable-bridge-in-chicago-field-notes-for-civil-engineers-and-bridge-crews/

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32x25x16 Clear Span Truss Structure

https://makertube.net/videos/watch/1e4bda0f-f683-4331-aed6-ab43b9ead58f