You never want to bolt through a round, square, or rectangular tube
without welding in a spacer bushing to keep the opposite walls from
collapsing.

stryped wrote:
I am just thinking here about that trailer. I may never build it but
if
I did get materials and did try to make it out of that 2x2 or 2x3
square tubing, what if I mafe a triangle gusset for each corner on the bottom.
Drilled through the top tubing through the gusset, then installed a
grade 5 carriage bolt or something. Then welded the whole thing also? I
guess I am trying to "over engineer' it. I can weld, but have never had
training. I have never had anything really come apart that I have
welded, but on something like a trailer, I would like to take every
precaution I could.