County Prestress supplied prestressed concrete plank and support materials for the Grain Belt Terrace project, a luxury apartment complex in Minneapolis. Hollowcore is an ideal building material for residential projects in densely populated areas. With high load capacities over long spans, hollowcore plank requires fewer support columns, making room for more parking spaces. Its design maximizes usable vertical space by concealing HVAC and wiring within its cores. County Prestress supplied more than 50,000 SF of 12-inch depth hollowcore plank and solid slabs, more than 650 LF of columns, and nearly 2,000 LF of beams.