I am creating a jig that will sit on the floor and am looking for the correct fixture method in simulation. I want the base sheet to be able to sit on the floor (no translation through the floor) but be able to lift if the force is enough to cause it to. Is my best option to create a floor and rigidly fix it under the jig while fixing the jig base plate horizontally and not allowing penetration? Or is there a fixture in simulation that does not allow in certain directions? I looked at roller/ slider but am not sure that is what I want.

Here I have the base fixed and the jig is reasonably rigid, but I want to check the base also.