Floor joists in and laying down the decking for the top floor. I used 2x6's for the joists and 5/4 for the decking. The support beams are two 2x8's bolted to the posts with 6x6's sandwiched in between, also used some 45% angle 6x6's for bracing. Is that clear as mud? The top floor is 16' off the ground at its tallest point, that's a 12' stepladder in the pic. (on the ground).