We've discussed lots of shop made tools and this one is another 'tool' that was built to help me store, load and unload, move and handle sheets of aluminum.
At and age of "half dozen decades" and (hopefully) rising, I'm not lifting too much anymore by way of hefting sheets of aluminum around during the build. So I've had to spend some time making a 'tool' to handle sheets.
For want of any other terms I'll call it a "sheet handler", but it could be called by lots of different terms; anyway I look at this tool I'd call it long over due! You may not build regularly but even if you do; your plans to handle aluminum sheets may be one-off so that you don't need to spend lots of time to handle sheets over and over? This tool was built to allow one (old) man to unload sheets, store them, get them in and out of the shop and generally move entire sheets of 6'x25' x 1/4" aluminum without strain or risk to the old welder's carcass.

First this tool is a 20' long slightly "A" section (6' tall) truss that will store sheets of aluminum by standing them on edge. Here is the concept model in SketchUP

Here is the main truss going together in the shop. A frames were made on horses then stood up and tacked to the two bottom rails and then topped with 20's angles and finally X'ed together.

What I needed was a relatively light wt frame to hold the sheets for a boat, stacked on edge, and leaning in toward the other side, but not lying flat. I also needed to be able to stack half dozen sheets on both sides and to store extrusions of all types inside the rack.

There will eventually be cross pieces between the apexes of the truss frame that will stiffen the truss across the A frames and hold the extrusions.
This entire truss weighs less than 200 lb, the two long runners are 2"x 2" square steel tube, the cross pieces under the four A frames are all the same square stock and the uprights are thinner walled angle as are the X's (truss webbing) all 1/8" angle.