Step 3 – Preparing the joists

Measure from the top edge of the bottom header joist to the wall-side edge of the top header joist (in a straight line). This will be the length of the inside edge of your joists (10ft 2×6 boards). Mark the inside edge of your board, and make a 45-degree cut across the broad side of the board—this cut will allow the board to sit in the joist hanger. After your initial cut, measure along the edge of the cut 5.5 inches from your initial mark, and make another mark. Flip your board over and, starting from the second mark, make a cut perpendicular to the first one—this cut will make your joists flush with the edges of your header joists. Repeat these cuts on the other end, making sure your first cut on that end starts on the same edge of the board, and then do it all again with the remainder of your boards.