Instructables

Step 20: Measure and cut the chair back slats

You'll need (7) chair back slats.  These are tapered cuts.  I made a simple (yet dangerous) taper jig out a sheet of masonite and a few smaller pieces of wood.

You can simply mark the board from the measurements below and use a circular saw to rip the taper.

I marked the length approximately; this is a good place to use some of your less than perfect boards.  Anywhere from 34"-36" should do fine.  As you'll see later, we're going to trim the tops to make the fan shape at the top of the chair.