Metromont’s C-GRID-reinforced insulated precast concrete panels used for data centers typically measure 12 square feet (depending on the data center design) and 9 inches (229 millimeters) thick, made up of two 3-inch (76.2-millimeter) thick concrete layers, called wythes, that flank 3 inches of extruded polystyrene (XPS) insulation material. The concrete sections provide strength for the panel, while the insulation layer offers its thermal characteristics. The C-GRID bridges the three layers, strengthening the panel and making the layers behave like a single construction.