This summer I'm going to tear down a 2-horse trailer and rebuild it into a small heavy flatbed/stakeside (5½x9½'). My design goal is to be able to carry 3500# loads. What I need to do is to choose the lightest steel pieces which will take the load. Unfortunately, my intuition was developed building large oceangoing ships, and I tend to massively overdesign every steel structure I make. If I'm making a surface plate stand for example, there is little penalty, but on a hitch-mounted trailer, every pound you put into the trailer subtracts from the payload. This isn't a standard trailer design as far as I can tell, so I can't just buy some plans and order steel.
I plan to use steel channel for the frame box, angle for the stringers, and use2x6" tongue-and-groove fir for the deck. I'm leaning towards 4" steel channel and 2x2x1/4" angle.
Ideas? Comments? Suggestions? All welcome ..
Grant Erwin Kirkland, Washington