Saw off the surplus wood and plane to the lines thus scored.

The side pieces may be finished in the same way, and the parts are then ready to be assembled.
HALVING-JOINTS A halved joint is one in which half the thickness of each member is notched out and the remaining portion of one just fits into the notch in the other, so that the upper and under surfaces of the members are flush.
_No.14.A cross-lap joint_, Fig.

264, is a halved joint in which both members project both ways from the joint.

This is a very common joint used in both carpentry and joinery, as where stringers cross each other in the same plane.
The two pieces are first dressed exactly to the required size, either separately or by the method of making duplicate parts, see Chap.

IX, p.204.Lay one member, called X, across the other in the position which they are to occupy when finished and mark plainly their upper faces, which will be flush when the piece is finished.