Here are some photos of my primary bench. Constructed of 2x4s and 5/8" plywood, assembled with 1/4" lag bolts & screws, and sheetrock screws. The bench is 96"L x 24"D x 36"H. The single shelf is the same size as the top, notched at the legs and is 15 1/2" off the ground.
Attachment 188299Attachment 188300Attachment 188301Attachment 188302Attachment 188303
Made from "scratch", one sheet of plywood and 5 or 6 2x4x8's, and lag bolts and screws of various lengths.