Quote:
Originally Posted by drummer
Engineering-savvy folks, please chime in!
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So imagine one of our overpasses here in Texas. Generally they're these concrete structures with a sort of "box" underneath the road that supports and stiffens the road way as it spans between massive columns. We've all seen this and maybe haven't thought much of it; they're "Box Girder Bridges".
https://erkrishneelram.files.wordpre...der-bridge.jpg
Now take that but remove many of the columns. Your bridge now spans a long distance without decent support which causes it to sag, twist, and bounce. What few columns you have left, usually just two, you reinforce and elevate them above the roadway into a tower like structure. The cables can be attached from the tower to the roadway. Workers come and typically post-tension, or tighten after installation order to keep the roadway supported and stiff over it's unsupported spans.
From an aesthetic stand point these bridges usually don't have a high tower like the cable-stay bridges, like the Golden Gate. The stiffer concrete "box grider" portion of the bridge takes more of the load from the cables. This means the cables can be at a more horizontal angle and allows the towers to be smaller.
What this means is I'd fully expect this bridge to be relatively disappointing in comparison to the bridges in Dallas. It may end up looking more like the 35 Bridge in Waco.
https://www.beecreekphoto.com/images...t-DSC02172.jpg