Reset the stacked dado set to 3/4" thickness, but keep the depth of cut at 3/16". Grab the twelve 16/1-2" pieces and make a mark 3/4" in from one end, on one of the narrow 1/2" sides. If you're using a radial arm saw, use a clamp to set a stop block at the other end of the piece of slat to mark the cut points for the rest of the slats. In this manner, you only have to measure and line up one cut, and the rest are as simple as placing the stock against the stop block and cutting the dado.
If you're using a table Saw for this step, you'll need to mark each piece before cutting the dadoes. Be sure to use your miter gauge to guide the pieces through the saw. Do not use the fence for this procedure, as it can cause the stock to bind.


