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pennGG1 - For those who may not be aware, bridges are supported by abutments at the ends and piers, if necessary, for the interior supports. One reason abutments are different from piers is that they have to retain at least a small amount of soil used to support the track beyond the bridge. As for setting up my abutments, I build them deeper than the scene requires and then set them to support the bridge (and track) at the desired elevation. Then I run the scenery up to them and cover the very bottom where any shimming may have been needed. The visible portions of the abutment are the wings, the seat and the backwall. The height of the backwall above the seat is the depth of the girder plus the depth of the bearing. This is not too difficult to understand when thinking of a beam or girder bridge, but can become complicated when working with a truss with a floor system used in conjunction with the main truss supports and their bearings. I am working on some bridge projects but it will be some time before you ever see any of my work in any magazines. Good Luck - Ed
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