Quote Originally Posted by ghettopalmetto View Post
Yeah, 60 foot beams...those are cheap and easy. No big whoop. Just do some mathematical guesswork, post it on the internet, and all is good.

I mean, it's not like steel costs money or anything. I heard they recycle steel now, so maybe we can take some girders from an empty factory.
It costs money. Nothing is free. It will cost one hell of a lot less to put up half a dozen or even a dozen pedestrian bridges than to replace one of the vehicular bridges they are removing. The live load on the pedestrian bridges isn't that much, you are pretty much designing around the dead load.