This bench is made of 5/4 hard maple, the stile is 6/4 for extra strength because it's pegged. I just finished up with the shellac finishing on the surfaces, with a little wax on the mortise pegs, in the bench sleeves and on the brackets. The seat is 42 inches, end to end with a seating area of 36 inches by 12 inches wide between posts. The seat rests on adjustable wooden brackets held by high quality wing nuts that don't require a tool to tighten and loosen. High quality threaded steel rod was used that threads into a 3/4" insert on the back face. This bench rocks if the brackets are installed with the curved faces up. If rocking is too funky, then inverting the brackets makes for a flat bench to. The brackets are 10" long x 2-3/4" wide in the middle. The seat can be adjusted for 19-29" of height.
Various parts to the bench:
The uprights are mortise and tenon feet, with rounded mortise slots for handles and square mortise for the stile. The peg holes in the stile are 1/2" x 3/4" at top and 1/2" square on the bottom, pegs are 6" long. Some of the mortises I chopped by hand (one foot), some routered (handles, bench sleeves) and some with my recently acquired drill press with mortise attachment (upright stile hole,pin holes). Table saw was used to cut the tenons. I like the drill press the best, but you still have the clean up with chisels and a good rasp sometimes. ;)
Pre-finished (not sanded) shot here showing the wing nuts, pegs and the backward rock.
Shows brackets, rounded top for rocking, square bottom for flat bench seat. Pegs tapped in place on the stile.
Assembled, solid as a rock (maple). ;)