Round tubing frame trailer

[jchill]

Is there any reason not to to an expedition trailer frame with 1-1/4" round tubing

 

[REDONE]

It's more expensive and more difficult the join. You'd have to fishmouth all the joints to get a clean weld, as well as add a bunch of flat plates with gussets for all the attachment points. Square tubing or channel can be fit using all straight cuts, and it's already inherently flat where you need to attach things like the body and suspension.
If you've already got a bunch of CREW or even HREW laying around, might as well use it. If you're planning this from scratch, round tube will extrapolate the challenges.

 

[jchill]

I have access to free round forgot to mention that

 

[CampStewart]

Unless you are an experienced fabricator with a host of tools I think it will be at least twice as difficult as using 90 degree angle material. It would also depend on your design and if you have a bender.

 

[bluejeep]

you could get some input from Yeti, check the video attached around 40 seconds in

https://www.youtube.com/watch?v=QARt7uvTm0c