ASM International has designated Brownsville - Route 40 Bridge an historical landmark. This bridge, designed by and built under the supervision of Capt. Richard Delafield in 1839 to improve the "National Road", is the first cast iron bridge to be built west of the Allegheny Mountains.
Cast Iron
Society: ASMMain Category: MetalsSub Category: BridgesEra: 1830-1839DateCreated: 1839Market Street east of Bank StreetBrownsvilleState: PAZip: 15417Country: USAWebsite: https://www.hmdb.org/m.asp?m=252Creator: Delafield, Richard
YearAdded:
Image Credit: WikipediaImage Caption: Brownsville bridge
1988
The Whipple Bowstring Truss Bridge was built from a design patented in 1841 by Squire Whipple. Whipple was the first person to understand the stresses in truss members and he developed the first theoretical formula to calculate stresses in the articulated truss. His bowstring truss was the first to use cast iron for compression and wrought iron for tension membranes.
YearAdded:
Image Credit: Courtesy Wikicommons/RehrenbergImage Caption: A Whipple Bowstring Arch/Truss style bridge, built by S. DeGraff in Albany, NYEra_date_from: 1855
1981
Innovations
The Whipple Bowstring Truss Bridge was built from a design patented in 1841 by Squire Whipple. Whipple was the first person to understand the stresses in truss members and he developed the first theoretical formula to calculate stresses in the articulated truss. His bowstring truss was the first…
Read MoreASM International has designated Brownsville - Route 40 Bridge an historical landmark. This bridge, designed by and built under the supervision of Capt. Richard Delafield in 1839 to improve the "National Road", is the first cast iron bridge to be built west of the Allegheny Mountains.
