Another joint that is in common use is the shoulder or lapped joint; it is often seen on the corners of pieces of furniture. This is not as strong as some of the other joints, but is quite easy to form by cutting away half the thickness of each of the pieces of timber to be used.
Use a marking gauge to make a line across the full width of one end of the timber and continue this mark for a short distance down the edges of the long side of the wood. Turn the timber on to its flat side and with a setsquare join up these two short marks across the width of the board. This will give the depth of the saw cut.
Now hold the timber, still flat side down, on a bench hook and using a tenon saw, cut vertically down this line until the depth of the cut is half the depth of the thickness of the wood. Turn the timber on end and cut along the line scribed with the marker gauge until it reaches the first cut and a square ended strip of wood can be removed.
A shoulder or rebate plane can now be used to tidy up the two edges of the rebate along the direction of the grain. If tidying needs to be done across the grain, a sharp chisel should be used.
Follow the same procedure on the next piece and the rebated joint is formed.