Originally Posted by tjspiel

Usually the interior walls of a building have wooden or metal "studs" running vertically from floor to ceiling. The spacing between studs can vary but about 16 inches is typical. The studs are what hold the next floor up. As long as you're mounting the Leonardo on a part of a wall that has a stud behind it you should be fine. Metal studs are often found in newer commercial buildings and you will need a different type of screw.

Oh and I should say the way I've seen these set up before is that the rear wheel remains on the ground so there isn't that much weight on the hook itself.