Sagging was another issue with the trailer, as it was. The problem was that, under load, the top plates of the I beams were (of course) under compression. Because of the angle formed into the beams, the force vector there was forcing the tops of the I beams out, allowing them to twist and sag -- not good. I resolved to stop this by bolting in braces from the new cross channels I had added under the beams to the top flanges.
I bought some 3/8"x3" aluminum bar stock to make them, but they would need formed bends at each end to compensate for the 6" offset. That could have meant "clamp in vice and bash with a hammer" but with 12 to make, something a bit more sophisticated was called for.
I've been guilty of making some ugly tooling in my time, but this effort might take the cake. An angled "former" was welded from some 3/8" steel bar. Then a chunk of 1" water pipe was welded on to it. The pipe would slide over the rod from an old press that was burned up in a shop fire at my place several years ago. The jack pump had been ruined in the fire, but I just fitted another small hydraulic jack temporarily.
The aluminum bar would be set on the edge of a heavy chunk of angle iron from an old dock. The fold line was marked with a sharpie, and the former would then bend it until it stopped at the required angle. Crude certainly, but as you see here, it work surprisingly well.
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