The Auxx-Lift has strut channels which are mounted perpendicular into the garage ceiling joists or ceiling supports. Two struts are mounted to not less than four ceilings supports for added redundancy. Afterwards you join the motors and System  We are not able to warranty the maker will protect any substitute https://stephengnva85285.oblogation.com/34452445/auxx-lift-1400-heavy-duty-garage-storage-that-works-for-you