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RE: Rail Cars As Bridge Decks

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I'm not sure why they "want you to do likewise."
Is the cost savings so much? Is it an "aesthetics" thing? (Who'd think of a railway flatcar as having "aesthetic value," but in Lousiana, they think crawfish are pretty!)
Why will they not consider any other design?
-----Original Message-----
From: Randy Russ [mailto:rruss(--nospam--at)]
Sent: Saturday, June 05, 1999 10:04 AM
To: seaint(--nospam--at)
Subject: Rail Cars As Bridge Decks

I have recently been commissioned to design a roadway bridge for a rural parish (that's right, this is Louisiana). They utilize flat rail cars for the bridge deck and want me to do likewise. The bridges that I observed were well build and in good shape.
I have searched (to no avail so far) for information on these flat rail cars. I would like to know standard geometry, how they are load rated,who does the rating, etc.