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. If the shelf will be holding a heavy load, use three standards, spacing them 16 inches apart. Lay a 4-foot level across the two brackets, then raise or lower the unsecured standard until it’s level with the first. Mark the top screw hole location, as shown. Fasten the standard to the wall following Steps 3 and 4. Tools and Materials. When installing a floating shelf you will need a stud finder, level, measuring tape, drill, screwdriver and pencil, as well as materials that provide hidden support for the shelves, such as ledges, dowels, pins or hidden brackets. Use screws that are at least 3 inches long to install the supports, Use a drill to drill into the stud where you’d like to hang your shelf. To create the first hole for your special bracket, use a 0.25 inches (0.64 cm) drill bit to get started. Once you’ve created a small hole, switch to a 0.5 inches (1.3 cm) bit and drill a hole for the bracket, making sure not to drill too deep. Lay a bracket on the board 4 to 6 inches from each end of the shelf. Line up the back of the bracket with the rear of the shelf. Make a pencil mark on the shelf in each of the holes in the bracket. Transfer to the wall. Hold the level against the wall at the height you want the shelf. Remember that the top of the shelf will be above your marks. Adjust the level until the bubble is centered, and mark the keyhole locations on the wall. Then install anchors or drive the screws into the studs and hang the shelf. .
Locate Studs with a Stud Finder. They should be spaced 16 or 24 inches apart, measured center to center; note, however, that this spacing can change near doors, windows, and corners. Use a battery-operated or magnetic stud finder to locate the studs in your wall. The former tool will detect the studs behind drywall, Often, when installing shelf brackets, you may find that the only wall available for you to mount your brackets on is a hard brick wall.Mounting shelves on a brick wall may seem difficult at first, but if with the right instructions, materials, and tools, it may not be as intimidating as you first thought. .