Geopier Rammed Aggregate Piers (RAP) as a Ground Improvement System for a 6 Story Residential Building in Chicago
As the developer and owner of a 36 unit residential building at 851 W. Grand in Chicago, 3F Construction spent considerable time evaluating the most cost-effective foundation solution for the building. After extensive research, in field testing, and one failed approach, 3F selected Geopier Rammed Aggregate Piers (RAP) as the ground improvement system. This allowed us to construct the building on traditional spread footings. The Geopiers worked great and exactly as advertised. However, the City of Chicago does not formally recognize “stone column” ground improvement systems.