Okay, I am back. Spending the weekend on this project. Here is an insight of what this scratch builder does for kicks. So far . . .
Been trying to get a grasp of how the builders slapped together this movie bridge. Since it was a temporary build, the builders were not too overly concerned if things did not fit together. Here I am drawing some of the observed cantilever joints, and trying to find an ideal. It turns out too complex for a small scale model. So I worked out a simpler solution for my own construction.
Below, my goal was to find out, with the available materials, how to include the main girder (spanning the whole bridge) without closing the gap between it and the top of the bridge towers. All the kit versions suffered from this problem. I do not wish to follow their example if I can help it.
Before installing the piers, I needed to know exactly how high the main girder is above the waterline (or base plate). Once known, both end piers can be constructed to the correct height. Then a metal beam can lay across these two ends as a guide for all the other piers to meet the exact height and lean-in angle.
Note, where the piers go into the base board, at an angle. The pier ends need to be trimmed and shaped to fit in the holes correctly.