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 grove plywood. If you look at the pictues you will see the first 10 feet have been done and the remaining trusses need to be reinforce and cutout.
1. Is this a good method? Do I need additional bracing
2. Should I add more 2x6's in between the 24" in the roof, top and vertical support?
Any other advice and comments would be greatly appreciated.