When I build mine in the spring, I am going to design it so that when I am done I can run the circular saw down the middle of it length wise and turn the two left halves into a long work bench.
That is an excellent idea, whether out of wood or steel. If you built it, knowing in advance you were going to split it, you could add the "back" bracing at the git-go and be hours of labor ahead. Great idea.
I tried those Edsal racks, from Home Depot and Lowes. Extremely disappointed in them. The side supports were obviously built in a jig, unfortunately the jig was crooked so every upright was then crooked, AND exactly the same. What it boiled down to was that the front and back legs of each upright tapered closer together as they went upwards, so the wire shelves would be loose on the bottom, slightly tight in the middle and un-usable in the top position. The spread measured about 3/8" from top to bottom.
When I took them back to HD for a refund, I check another set (opened the box) and it was off by the same amount. Went to Lowes and the same thing. I ended up finding real warehouse shelving on Craigslist that cost 125.00 (60.00 less that the Edsal crap) per section that included two 10' upright, 6-8' cross beams, 5 2x4's to fit across the two cross beams and a sheet of 5/8" particle board. I bought 3 complete sections. Much much better in my opinion.