My version of the vertical sheet goods storage bin. I've got a fair amount of heavy sheet goods from an auction buy so I felt I needed something a little more substantial than the Hatfield/Pellow/Popular Woodworking? solution. Mine also had to be more free standing with minimal support to the wall because it needed to be spaced away from the overhead door to allow the door to operate. It blocks about 2' of the width of the 12'x12' door. I also wanted something that would raise everything a few inches off the floor as occasionally a small amount of water will come under the overhead door during a heavy thunderstorm.
So, I came of with this. It is constructed from 2x4's bolted together at the top and bottom and 7/16" OSB.