Add support for wobbly shelves by installing stationary brackets
It’s true – simple one-piece, 90-degree-bend shelf brackets are visually unobtrusive. For greatest strength, however, choose brackets with an additional diagonal support. In either case, it's best to attach the bracket's longer arm to the wall and use the shorter arm to support the shelf. For long shelves, attach a bracket at least every 48 inches. For heavy loads, increase the size of your brackets and decrease the spacing between them.
This project guide shows how to install shelf brackets into wall studs and masonry walls.
What You'll Need
• Whenever possible, attach brackets to wall studs.
• Insert screws into the brackets and tighten until each bracket is secure.
• Save time by using an electronic stud finder to locate the studs.
• For heavy loads, attach a bracket to every stud along the entire span of shelving.
• To attach brackets to masonry walls, use plastic concrete anchors and screws.
• Attach on shelf bracket every 24 inches or every 16 inches for heavy loads.
• Level the brackets with a carpenter’s level.
• If necessary, hold the level on a straight 2x4 for shelf spans that are longer than the 3 or 4-foot length of the level.