Ideas wanted for plywood storage

[Billy Bob]

I have limited space for storing three different types of plywood (3/4", 1/2", 1/4" about 25 sheets of each) in my shop. I want to keep the plywood flat but don't want to pile each type on top of each other. Does anyone have a suggestion for building a rack so that I only use one 4'x8' floor space section ?

[dowens]

Here's a though. My buddy built a rack that hangs from the ceiling. It looks like the attached picture. Could you simply build a 3 layer rack with an opening for each plywood thickness?