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Ed, <br /> <br />Thank you so much. Actually I've scratch built a trestle and a swing bridge on my layout and I have nightmares about a structural engineer coming in and saying "what the heck is this!" <br /> <br />Actually my instant project is to build two highway bridges over a stream, one about 20' and one about 40'. I thought using concrete piers and i-beams to support the roadway would be the easiest approach, but I knew I had to do something with those bearings. Thanks for your help. Now that I know what they're called, it will be much easier to look for them. I might have to model them from scratch as well.
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