by Robbie » Thu Sep 29, 2011 2:51 pm
I am building my trailer frame out of 16 ga. 2x2's. I do have some hefty 1/8" thick corner brackets that will be welded in the corners for added strength but for lightweight trailer builds w/o heavy galleys the 16 ga. will be fine. There are quite a few builds on here that have 16 ga. frame material thicknesses. Having the trailer body bolted to the frame to help keep it rigid will give it alot more support and take some stress off the frame.
For the tongue I am planning on using an 8' long, 1/8" thick piece of 2x2 that goes back to the center cross member. So it will be welded to the front frame member as well as the 2nd and 3rd cross members. I'll be adding some diagonal supports from the side of the tongue back underneath the frame as well. Should be plenty strong to support a tongue box and a lighter weight trailer like mine.