These shelves are great. I have them in drywall with drywall anchors so I won't check their weight limit. The size of the panels corresponds to the size of the metal brackets when the brackets are over the panel. However, this means the brackets will stick out of the boards about 1/4 inch if you want the boards to be flush with the wall. That doesn't bother me, because floorboards that are flush with the wall ensure more stability. The shelves are quite narrow, so consider what items you place on them.
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