EARTH, PRECAST PANELS Height Range H = 10 to 65 ft/3 to 20 m R / W Required 1.7 to 2.0 times H st: $50 / ft2 or $500 / m2 E Wall, Precast Panels - Steps and Walkway E Wall, Precast Panels - Railroad Overpass and Wing E Wall, Precast Panels - Roadway Overpass Abutment E Wall, Precast Panels Typical Section 6 ncrete Crib Wall