Photo taken by Calvin Sneed in June 2010
BH Photo #167204
After lots of research and several visits, I located one other dual-ribbed concrete arch bridge, this one open-spandrel.
The Easley Ford Bridge over the Conasauga River in western Polk County. The 182-foot bridge contains one span, a 170-foot open spandrel dual ribbed concrete arch. Lateral bracing bars connect the paired ribs. The bridge has a curb-to-curb width of 15.7 feet and an out-to-out width of 17.7 feet. The railing is post and rail.
I've added a new design category called "Ribbed closed-spandrel arch." I was going to call it "dual-ribbed", but decided to leave it open in case somebody finds a three- or four-ribbed example.
Yes, the Georgia example certainly appears to be of the same design.
I believe this bridge in Georgia would also be considered a dual rib closed spandrel arch.
Interesting. I have seen many dual ribbed open-spandrel arches, but this is the first dual ribbed closed spandrel I have encountered. Perhaps this was a localized design.
They're not curved tee beams. T-DOT officially says all the spans are dual ribbed arches. A magnificent, elegant bridge in a quiet, tranquil setting.
Initially this bridge does resemble a deck arch. However, it might be better classified as a curved T-beam. Anybody have any thoughts on this?