Sunday, July 29, 2018

CSX/P&LE 1910 Bridge over Ohio River at Monaca+Beaver, PA

(Bridge Hunter, Historic Bridges, HAERSatellite)

P&LE = Pittsburgh & Lake Erie Railroad

Photo from HAER PA,4-BEAV,1--1 from pa3716

One of 26 images posted by Mike Brady
[Many of the images show the stresses calculated for each member of the truss.]
Pictures are of the original Stress sheet of the P&LE cantilever bridge at Monaca - Beaver PA . Appears to be drawn on vellum type paper using a ink well pen. All of the math about the bridge is here. Live load,dead load, impact load and wind load Date is Jan. 31, 1908. Bought this on eBay around 20 years ago. Was unaware at the time of purchase of what I was getting. Wow, when I actually received it. Total calculated design load on one of the main bearings is 11,994.000 or 12 million pounds or ( 6 thousand tons).
One of 26 images posted by Mike Brady

Photo taken by Bob Harris in May 2012 from Bridge Hunter

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Mark Arnold posted five photos with the comment: "CSX's Ohio River crossing between Monaca and Beaver Pennsylvania."
Pedro RamosPedro and 757 others joined RAILROAD BRIDGES, TRESTLES, TUNNELS AND CUTS within the last two weeks. Give them a warm welcome into your community! Wow makes you wonder how were they ever able to build a massive structure like this.
Dennis DeBruler One of the reasons for building cantilever designs is that it allows minimal interference during construction in the navigation channel. Typically, they would use timber falsework to build the trusses between the abutments and piers. Then they would use travelling derricks along the top chords to build the other sides with minimal falsework. I found some construction photos for a bridge: But the top chords on this bridge have a very steep angle, so I don't know if they could have used a travelling derrick.





Kenneth James White shared his post
And here's yet ANOTHER Ohio River colossus: The Beaver Bridge(P&LE) at Beaver Falls Pa.
[I see from Bridge Hunter that this is a HAER photo.]

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