Here is the rack in my equipment bay. A bit spendy ($500+) but could hold an elephant. I had my local welder do the frame and have it powder coated. I made the Formica covered 3/4 ply shelves. It is about 2X what I expect to need in terms of space but better too much than too little. See the bottom photo on my Theater Building Web Page
My main requirement was EASY (no squeezing into a closet, no rotating racks, no sliding cable tanglers) access to both sides of the equipment. Plus, of course, keeping all the blinking lights and glowing displays the heck out of the theater where they might have helped my ego but are really just distracting light pollution.
I can send anyone that is interested the CAD file that I gave the welder. See the web page for email. BTW - this puppy is heavy (150 lbs +) so be aware!