This is a common occurrence. Removing sono tubes that are 2 feet in the ground. This contractor called Postech Northern because the customer’s existing deck was heaving from the frost. While we were there, we decided to assist in the removal of the existing sono tubes. Well needless to say the pictures speak for themselves. Some were in the ground 2 feet some not. We installed Postech Screw Piles 6′ to 7′ in the ground. These aren’t going to move!