Here it is open with a G11/Gemini sitting in it. I cut holes in the floor and the tripod is sitting on round 2" thick concrete blocks. The floor and frame is made out of treated 2x4's and treated 3/4" plywood and it is really heavy. The shed is screwed on to the floor with long wood screws. The AP-130 scope fits in there with no problem with the roof on, but I take off the scope and Gemini and bring them inside the house for safe keeping when I am done.