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Soil Screw® Retention Wall System 
The CHANCE® SOIL SCREW™ Retention Wall System reinforces the earth to construct gravity walls. In this "soil nail" application, a Chance screw anchor acts in a bearing mode compared to grouted anchor, which relies on friction. This gives the SOIL SCREW Retention Wall System economic advantages. Bearing plates are spaced along the entire length of SOIL SCREW anchors. They are ready for immediate loading as soon as installed. Backhoes and skid-steer loaders can quickly rotate SOIL SCREW anchors into place. Anchor size and grid spacing are designed to local soil conditions and load requirements. A reinforced-shotcrete veneer often is applied to the wall face.
Performance ratings for installing torque and bearing capacity Rated for 5,500 ft.-lb. maximum installation torque and *70,000 lb. minimum ultimate tension strength, SS5 anchors have solid steel 11/2"-square shafts with 8"-diameter helices and are hot-dip galvanized to ASTM A 153 after fabrication. *Furnished coupling bolts limit ultimate tension rating.
Termination Adapters To assist geotechnical, structural civil engineers and related consultants and contractors in applying the SOIL SCREW Retention Wall System, Chance provides a complete design package comprising: Soil Nail Design Manual for soil nailing with screw anchors (see page 4 for more specifics),
Sample specifications, available on request: Both are hot-dip galvanized steel and fit 11/2"-square-shaft SS5 anchors.
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The SOIL SCREW Retention Wall System is based on more than 80 years of earth-anchor research and development by ISO-certified manufacturer A. B. Chance Company, which also markets to electric utilities, telecommunications and pipeline industries worldwide.
