Galvanized Earth Screw Anchors PV Mounting Structures, Deep Foundation Helical Screw Piles The ground screw system is a modern foundation system,which is installed by a drilling rig, making it the most effective and cost-saving foundation solution. It can be widely applied to different soil conditions. Ground screw can be used for many kinds of application, like solar system; timer-fram construction; advertising and traffic systems; urban garden and landscape construction;