Helical piles have lateral capacity based on shaft dia and length and soil type. The helical piles engineer use L pile to calculate the lateral capacity. We've installed hundreds of helical piles inside the plant I work at that are straight. Residential screw pile may have much smaller shaft...
Are you the engineer for the screw piles or others? We usually just give the loads to the helical/screw piles contractor and their engineer decide if they want to batter or not.
