If you are using wire shelving in closets, like this: Then the screws need to go into the wooden furring strips behind the sheetrock to be secure. If you are doing adjustable shelving with brackets and standards, like these: You should drill a tiny hole through the sheetrock and insert a nail to determine just what that depth is.Īs far as bookshelves, it depends on what kind and how much weight.
That means that any standard drywall hanger can be used for pictures and mirrors and such because you should have enough depth for the typical screw or nail that holds the fastener to go in without hitting the block.
