Diy Olympic Weight Rack . By pascaltt in living health. Choose an area that has enough space for the platform which will be 8' x 8' once assembled to be flipped several times. Homemade power rack plate holder Homemade gym equipment, Diy gym from www.pinterest.com Despite the compact 29.5” by 20.6” by 30.5” design, this unit offers ample storage. So i decided to buy some materials from the hardware store and make my own. The rogue westside bench 2.0 is a monster amongst benches.