T Halving Joint
- Mainly used where an intermediate timber meets an edge timber. It is formed by fitting the end of one piece of wood into the recess in the other, with half the thickness removed from the area shared by the two pieces.
Mark out the width and depth of the recess in the edge timber and cut squarely to the depth line with a tenon saw. Use a chisel or pre-set router to remove the surplus material from between the cuts. The depth should be cut twice, the first time to remove the bulk of the material, the second time to carefully take it down to the correct level.
Mark and cut the other piece as if it were for a corner halving joint.
Dove Tail Halving Joint
- For use where a stronger joint is required than the simple T halving joint. The sides of each half of the joint are cut at an angle of about 30 degrees so that when the joint is assembled, the separate pieces are locked together.
Mark out the width and depth of the recess in the edge timber as for a T halving joint. Then mark the angle for the dove tail, this can be achieved by using an adjustable square or by measurement. Cut the angled sides of the dovetail down to the depth line with a tenon saw. Use a chisel or pre-set router to remove the surplus material from between the cuts.
Mark and cut the other piece as if it were for a corner halving joint. Then mark each side of the projecting piece with the same dove tail angle down to the shoulder line. With the timber secured in a vice, carefully cut the angle down each side to the shoulder line, reposition the timber and cut the sides along the shoulder line to remove the waste material.
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