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| 2019 Photo by Geoff Hubbs via BridgeHunter, License: Released into public domain looking south from Astoria |
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The bridge was originally designed for two decks and four main cables, similar to the Manhattan Bridge. It was begun by the city on the eve of the Depression, and then taken over by the newly-formed Triborough Bridge Authority for completion after a re-design. If you look at the tower foundations, you can see where the middle pair of legs was to go. Torched-off eyebars also still exist inside the anchorages. This double-deck plan also likely influenced the retention of the truss design. [PRJ's comment]PRJ's comment explains the "bump" in the middle on the pier.
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| 1936 Associated Press via BridgeHunter 1936--Triborough bridge under construction, Hells Gate RR bridge in background |
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| Bridges Now and Then posted Construction of the Triborough Bridge, New York, 1936. The Hell Gate Bridge is seen behind. (MOMA) [PRJ answered a question that I have now deleted because I now know that MOMA stands for the Museum of Modern Art in NYC.] Dave Frieder: One of the few Bridges where the top of the road deck is in the center of the stiffening truss. Engineer of design, Allston Dana. |
I normally don't bother with deck street views, but because of Dave's comment above about this bridge using a pony truss, I checked it out.
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Two of several photos from a history of the Triborough Bridge:
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| 1 The Triborough Bridge suspension span between Queens and Ward's Island, as shown under construction in 1934. (Photo by New York State Department of Parks and Historic Preservation.) |
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The bridge was originally designed for two decks and four main cables, similar to the Manhattan Bridge. It was begun by the city on the eve of the Depression, and then taken over by the newly-formed Triborough Bridge Authority for completion after a re-design. If you look at the tower foundations, you can see where the middle pair of legs was to go. Torched-off eyebars also still exist inside the anchorages. This double-deck plan also likely influenced the retention of the truss design.
ReplyDeleteAlso, MOMA is Museum of Modern Art in NYC. That photo was on the cover of a book/exhibit catalog called "The Architecture of Bridges", published in the late 1940's.
ReplyDeleteThanks for the information. I have updated the text to include both comments.
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