When installing a two post car lift, it is important to make sure the concrete pad that lifts will be mounted to is thick enough for the load and weight of the vehicle being lifted. Generally speaking, a minimum thickness of 4 ½ inches (114 mm) should be used for any type of two-post car lift installation. This thickness provides an adequate base to securely support vehicles up to 10,000 pounds (4536 kg). When dealing with heavier loads, such as those encountered when lifting trucks or other heavy duty vehicles, thicker pads may need to be poured in order to provide additional strength and stability. It is also important to note that before pouring your new concrete pad you should make sure there are no underground utilities or obstructions present in the area where you plan on placing your lift.