To make wooden benches, cut the top and legs square to the desired length, paint or stain the pieces, build the frame, then attach the top to the frame. Finally attach the legs to the frame.
Cut the top and legs square, parallel on both ends and to length. If the bench is for indoor use, utilize fine joints and thin pieces along with veneers, while if it is for outdoor use, employ thick pieces and joints to minimize the area of wood exposed to the elements. Paints, stains, glues and finishes can be water-soluble if the bench is for indoor use. If the benches are for outdoor use, waterproof and tailor them for exterior use since they are likely to be exposed to fluctuating temperatures and moisture levels as well as UV rays. While building the frame, use corner clamps to hold the pieces together as the glue dries. Ensure that the top extends about half an inch from the edge of the frame to create a more attractive shadow line.
The secret to a pain-free bench that is comfortable to sit on for hours is a sloped seat and backrest. Sit on the bench to test the degree of slope that is more comfortable before tightening the bench parts permanently. Smoothing over the edge by hand-sanding also protects the shins and backs of thighs. Keeping the casing nails at least an inch from the edge hinders hitting them during sanding. To ensure the legs last as long as the bench, seal the ends with epoxy or urethane.