This is a project I started about 1 month ago.I built 15 climbing volumes out of 2 4x8' sheets of 3/4" plywood,several 8' 2x3s, and
lots of t-nuts! I put some heavy duty hooks in the ceiling joist's. I hang the volumes on the the hooks and tighten them on the hooks so they dont spin and there flush with the ceiling. the reason for the hooks is so I can easily switch them around however i want to. I also made some holds(Soccerball, Teddybear). If i build more of the volumes i might make an Instuctable!