Thread: Home Built Trailers

Originally Posted by Graeme

I fitted full-length support because less than full-length would have caused both the weakening of the existing draw-bar at the end weld point and the end weld point would have been where there was a change in rigidity of the drawbar, which would have added to the possibility of failure at that point. With full-length, the drawbar operates as a single ladder span.

The forces are not even through the drawbar, I think they peak at the front of the box. I doubt if tapering out the truss would cause any problems, especially when you consider the coupling plates are just flat, no flanges and only 5mm thick.