Well, I don't have *that* many laptops to fill the whole thing. Mostly the bottom shelf is loaded, with 16 laptops in total, of course the bottom shelf has no issue with any weight. The first shelf above it has just a few more thick laptops. I also have a 2x4 unit which is placed down on its long edge. I use one of its upper shelves to store 9 more laptops, together with a few ultrabase docking stations.