C4W, I built my main bench from 2x4s and (I think) 5/8" BC plywood, 2x4 legs, all assembled with 1/4" lagbolts. It's a full 8' long and I believe 18" deep, appx 38" off the floor. Exact measurements tonight. Top, and a single full length shelf, are plywood and are affixed with coarse thread sheetrock screws. Very simple construction for anyone half-proficient with a table saw. Plans were from scratch.
I tapped into an adjacent GFIC electric outlet using flex conduit and wired duplex outlets on the front of the bench as well as the light switch for the overhead flourescent light.
I took pics during frame construction and will see if I still have them tonight. If so, I'll post tonight.