Anyone made any mobile racks for scrap metal or wood? I was thinking of something like the flat carts you find at Lowe/Home Depot with 1000lb casters.

The wood rack - maybe a couple U frames welded upright for sheet's and maybe some square bar with pieces welded at 90 degrees off of that as shelving for small stuff (2x4's, 2x2's, etc)

The Metal rack - perhaps a similar square tube with rack as above for 3' - 6' material and in front of that perhaps a number of something like a bank of 10" round tubes by 16" long welded upright to organize smaller pieces.

I would like something mobile so I can get them out of the way depending on what I am working on.

Thoughts?