Geared Steam Hi Ed You may have better luck over at the 1:1 forum http://cs.trains.com/TRCCS/forums/111.aspx
Hi Ed
You may have better luck over at the 1:1 forum
http://cs.trains.com/TRCCS/forums/111.aspx
Thanks. I did just that.
Ed
"The true sign of intelligence is not knowledge but imagination."-Albert Einstein
http://gearedsteam.blogspot.com/
Along the Columbia River (on the North shore), the BNSF has 4 (maybe 5) old truss bridges. They probably go back to when the main line was built early in the previous century. I've gotta believe they'll be replaced in the near future. I'm wondering what they would be replaced with. They are of various lengths, but the short ones are pretty much the Central Valley 150' bridge. The necessary clearance underneath would seem to negate use of a deck bridge.
So, I'm wondering if they would replace a 150' bridge with another truss, or whether they would go with a through girder. While a 150' through girder is unusual, I believe they're around. Also entering into the decision making is that the girder is more "modern looking". I'm sure BNSF will have to get massive amounts of approvals from all kinds of "stake holders". You'll note that the San Francisco Bay bridge replacement is not another truss.
Just wonderin'