EPS29 Geofoam was used at three different locations to reduce the lateral pressure on this concrete wall at the Lancaster Elementary School in Milwaukee, Wisconsin. To eliminate excessive lateral pressure on the wall, which abutted a paved surface with vehicular traffic, the engineer specified EPS29 Geofoam. By installing the Geofoam bocks in an inverted step pattern at approximately a 45 degree angle from the base, most of the lateral pressure is removed. This same technique is used in the construction of tall retaining walls. By adjusting the pattern of the Geofoam, all, or a portion of the lateral pressure can be removed providing the design engineer with options in design of the actual wall.
The EPS29 Geofoam has a compression strength of 10.9 psi (1570 pounds per square foot) at 1% deformation. This density, as well as lighter densities, are used in bridge and highway construction for similar applications. EPS Geofoam is available with compression strengths up to 18.6 psi (2680 pounds per square foot) at 1% deformation. It ships from locations throughout the United States and Canada.