Since there is a chance the fasteners in the floor may corrode we planned the frame to have two channels on the outsides. This was so that when we attached the plywood underneath we could do it in sections. In the future we can remove the panels and check to see if the connectors need to be replaced without having to open up the entire floor.
Another issue we came across when framing our floor was the conflicting information on the internet. When reading “Go House Go” (a great resource so far) we were lead to believe that when using an Iron eagle trailer we should frame the floor separately then lift it into the trailer and fit it into place. However, after framing our floor separately, we called the trailer manufacturer and they informed us that we were supposed to build the floor framing by fastening the two longest boards (stringers) to the trailer and then installing the joist hangers and then finally the joists like you would on a typical deck floor.
Oops. Luckily we were still able to disassemble parts of the floor and install it onto the trailer with relative ease. Success!
What we learned here is if you buy a trailer with the specific purpose of building a home on, make sure to contact the actual trailer manufacturer for specific floor installation instructions.