Abstract: A panel of a structure includes an outer layer and an inner layer that is positioned closer to an interior surface of the structure than the outer layer. An intermediate layer is positioned between the outer layer and the inner layer, and a mask layer is positioned between the outer layer and the intermediate layer. The mask layer includes an outer portion and an inner portion, where the outer portion is positioned between the outer layer and the intermediate layer, and the inner portion is positioned between the outer portion and the intermediate layer. The outer portion and the inner portion include different visual attributes.

Abstract: A panel includes an outer layer and an inner layer. A mask layer is positioned between the outer layer and the inner layer. An active layer is positioned between the mask layer and the inner layer and adjacent to an outer edge of the panel. The active layer extends from the outer edge of the panel toward a central portion of the panel and includes an independently controllable active element configured to limit viewing of the mask layer.

Abstract: A concrete keyed joint is formed using a joint plate which has coplanar top and bottom sections interconnected to a parallel rearwardly spaced central section by rearwardly convergent upper and lower inclined sections and spaced pair of holes in the inclined section. Pegs or stakes support the joint plate vertically and are locked by wedges which allow vertical adjustment of the joint plate and then lock it in position. A resilient filler strip is fitted to the top of the plate to accommodate thermal expansion and contraction of the concrete slabs separated by the joint plate.