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Thanks a lot Big Inch. The clearance between the bridge and the river isn't going to allow me to hang. I need to be as high as possible. I'm waiting on the bridge engineer to get me the latest version of the bridge plans, then I'm going to start working it out. I wish my Grandfather were...

CRG, You ask an interesting question. The current bridge crossing does not use rollers and has been in service since about 1968 with no issues. However, most of the other bridge crossings I operate and maintain (note I did not "design any of them"...they predate me) do incorporate rollers...

Didn't mean to offend you Col. And, as a matter of fact, I was on Amazon checking out the Peng book when you posted. Phil

Hi, I've got a natural gas distribution line replacement project due to bridge reconstruction. The old bridge is coming down, a new one is going up, and I have to move the gas line. The bridge designer has provided a location to install the gas line, near the edge of the bridge under a...