Today, we put in the 2X10 floor joist in the silo, then covered it with a plywood subfloor. Eventually, it will be covered with reclaimed tile, but for now this will do. Next, we screwed another 10-foot 'ring' on top and started framing the 2nd story. We also wrapped the lower portion with 3/8" plywood to stiffen everything up before moving up. The sheathing made the curve with no problem. The project will slow down (more!) from here on, as working on scaffolding always takes at least twice as long.