Collisions on animated skeletal mesh

I’m making a game in which I need collision to be more complex with my skeletal meshes. The skeletal mesh is actually part of the level itself and I cannot seem to figure out how to make this work. I’ve posted some pictures for clarification. The part of the mesh that is elevated has collision, but it should not have collision in the center part (currently has collision as if it

doesn’t have a hole in the middle). I have not found a way to make this work. Any ideas?