Built this using 8x8" pilings, and 6" X 9 lb/ft I-beam. The brackets on top of the pilings are made from 1/4"x6" flat plate, bent to fit securely on top of the pilings, lag-bolted to the piling with stainless lags, and the beam is welded to them.
I'm using 2 ton chain hoists, although, it's...