Can Geopier RAPs resist uplift forces?
Yes with Uplift Rammed Aggregate Piers. Rammed Aggregate Piers equipped with a 2-bar or 4-bar structurally designed uplift anchor can resist seismic and wind tension forces from 25 to 100 kips depending on soil conditions, see graphic detail. Typical Geopier uplift bar sizes include No. 6, 7, 8, 9, and 10 from Williams Form Engineering.