Hello all.

Picked up a Royal Utility box for a song and am going to convert it to a trailer for a mobile welding rig. Need help on the frame to support it. What thickness and type of material would you build the main frame out of? C-channel? Box tubing? What wall thickness.

Normally I would over build something, but I trying to keep costs down. My theory is that the utility box is going to provide a substantial amount of rigidity to any frame that I build so I would like to save on steel costs.

Utility box weighs in at 1000 lbs. and is 8 feet in length. Thanks!

I am posting this on other forums, so I apologise if you run into this elsewhere!