The Ultra-Rib panel sets the industry standard for concealed anchor, horizontally-oriented corrugated wall panels. The clean architectural design provides a traditional horizontal rib application with the added security of concealed fastening. The clip-less design results in fast and easy installation while the uniform rib profile provides an exceptionally rigid panel suitable for installation over open framing. Factory mitered corner panels are available to eliminate added trim and interruption of the panel at the corner transitions. Ultra-Rib panels are designed and intended for horizontal installation upon vertical wall applications and are not to be used for roofing.