So I have a structure that I have to test, or more so a "model" structure. It is in the shape of a T, but rotated on its side, so that the stem of the T is a cantilever beam. An actuator will be used to load the structure at the free tip of the stem. My task is to design the supports of the structure such that it can be loaded in such a manner. I will be attaching bars/cables to the top to provide restraint, and will have a base plate at the bottom. Herein lies the problem. The base plate rests on a concrete floor. I am not allowed to alter that concrete floor in any way, nor are there holes in the floor close enough to bolt the structure down. So how do I prevent the base plate from slipping? Because if it slips, the results will be inaccurate and there is the risk of someone getting injured. There is also no way to fix the top of the column to something rigid.