The Pulldown™ Micropiles are used to install Screw Foundations in soft soils where support on a slender steel shaft is a potential problem or when the installer wishes to incorporate the friction capacity or other advantages of this high capacity helical pile.

During installation of screw piles, there is tremendous downward thrust generated by the helix plate(s) on the shaft. This "pull down" force is proportional to the installation torque, and is dependent on the soils in which the helix plates are installed. The process typically doubles or triples the ultimate compression capacity of the slender shaft when the helices are placed in adequate bearing at some depth below very soft soils. Additionally, the technique can allow protection of the anchor shaft by encapsulating the shaft, as it goes through possible aggressive environments, with fibril reinforced grout coating.