A 50 foot bridge is very possible with a truss construction. And I bet the truss would only have to be about 4 feet high. An engineering student would be a good place to tap into if you know one or perhaps contact a school and see if a prof has any design students who need a project. Or, I know I have found a web site before that will show you how to design and optimize a truss for whatever load you need. I think you can download the software. Then you can start with whatever material you think you can find and conduct the proper analysis yourself to design the bridge. I'll see if I can find where I got that software but I'm guessing if you google it you can find it.
Last edited by bz; 01/20/09 08:43 PM.
