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Other Helical Applications <br />Other applications for Helical piers also includes New/Pre Construction foundation <br />supports, as well as Helical tieback anchors and soil nails that are used for basement <br />walls, retaining walls, levees and dams. <br />In the tieback application, the Helicals are installed to hold the wall in tension and resist <br />soil pressure, which prevents further bowina or leaning_ in basement and failing retaining <br />walls. <br />For levees, dams, and seawalls, the Helicals are also installed in tension to prevent soil <br />erosion around areas where water is retained or actively flowing. <br />In situation where structural or soil conditions are not right for Helical anchors, a plate <br />anchor system may be a suitable option. Plate anchors are also designed to hold the wall <br />in tension, typically with a lower load capacity than the Helical tieback anchors. <br />Helical Pier technical information <br />In most residential applications, 3D Structural will use a Helical pier with either <br />double or triple helix configuration. This will vary due to weight and size of the <br />structure, as well as pier spacing. The more common helix sizes used are 8", 10", and <br />12". <br />