Use through housing joints to provide secure joints for shelving. First, draw a line square across the inner face of the upright. Hold the shelf against the line and mark the exact depth of the shelf on the upright. Then use a depth gauge to mark the depth lines for the cut. These should not be more than one-third of the thickness of the upright. Or the joint will be weakened. Working just on the waste side of the line, saw down to the depth lines with a tenon or a dovetail saw, and then chisel out the cut. Start with the chisel at an angle of 30 and gradually reduce this until the centre is chiselled away. During this stage of. The job. Check the cut several times with a straight-edge to make sure it is flat and the depth constant. Plane the end of the cross-member and glue the joint into place. Where possible, screw. Pin or nail it for extra strength.
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