Helical piers are giant earth screws and have tested engineering results to back up their load bearing capacities. These are hydraulically screwed into the ground and their strength is correlated with the resistance pressure from the installation to measure the ability of the soil to hold. These work well to mitigate settlement for lightweight structures or to add additional load bearing capacities and uplift (wind) resistance to structures foundations. Helical piers have numerous options \and comply with ICC requirements. Typically an engineer is required to review the installation and ensure that the helical piers were installed to the correct load ratings.