Ok, I had a shady contractor start an attic build out for me. my attic had 2x4 trusses on 24" center. The contractor put in a 2x6's nailed to the 2x4 in the floor, roof, top brace, verticle supports resting on a 2 - 2x10 beam spanning between 2 load walls. The flooring was 3/4" tongue and ...