ABSTRACT
After cutting up the carcase material squarely with a panel saw to the length and height of the box, with an allowance of 2 mm (1 mm each end) on each of the four pieces, mark the thickness of the material, plus the allowance, 13 1 mm, in from each end on two pieces only, one long and one short. Square these around the material (face, edge, face, edge) with a sharp pencil. Mark the other two pieces of carcase from the two already marked. These marks are called shoulder lines.
