Adirondack Chair

Step 3 Assemble the Seat

Start seat assembly by screwing the lower back rail to the seat sides with one screw at each end of the rail. Then, add slat No. 4 as indicated in the drawing, again using only one screw at each end. Measure opposite diagonals of the subassembly and adjust it until it's square. When you're satisfied, add a second screw to each end of the two slats to lock the pieces in position.