Update- I called all the metal stores, metal fab's, and a few engineering businesses and no onecould give me a straight answer for a simple box design and I mean no one, so not sure for your setup, I let you down good sir lol. For my 28g low boy, home depot metal racks $90 is what I went with, the rack 800lbs max on each shelf, I am able to adjust the height to what I need and add braces with all the extra pieces, especially on the bottom so I can distribute the weight evenly instead of just four points, mine is only 270lbs ish, they have a heavier duty version as well. I'll be adding side paneling with a marble wrap and 2 front doors on the front for easy access to the equipment. I'll post pics when it's finished.