3. Cut the 2x4s to the length of your shelves. They will act as ledgers for the floating shelves. 4. Use a stud finder to plan where the 2x4s will be attached to the wall.
5. Apply a bead of construction adhesive along the back of the ledger.
6. Adhere the 2x4 ledger to the wall. Use a pneumatic nail gun to put a nail in the center of the board. Then, using level and hammer, make sure the ledger is level.
7. Use the drill and bit to affix the ledger into place (figure B).