Platform construction is based on box designs and uses frame-and-panel construction in simple form during earlier periods evolving into more and more modified forms in later periods. While earlier pieces show full frame-and-panel construction techniques, different parts of the construction were modified through the centuries to produce diverse looking pieces which still share the same basic construction. First the panel, originally complete, is subject to cut-out sections, followed by further reduction to what may appear to be simply decorative brackets. Further refinement of the same pattern lead the shape of the decorative brackets being incorporated into the shape of the surrounding frame and simultaneously the two mitered vertical pieces comprising a corner become one solid piece. Pieces start to have small cross-pieces attached to the bottom of the feet rather than a frame that is equal on all sides and finally, with evolution of the complex woodworking joints that allow it, the cross-pieces are removed entirely, leaving a modern table with 3-way mitered corners. Unlike European-derived styles, table designs based on this style will nearly always contain a frame-in-panel top, the panel serving as the tabletop center and the frame sometimes also serving as what would be rails on a European table. Cabinets in this style have a top that does not protrude beyond the sides or front. The critical element in almost all pieces of this type is the mitered joints, especially the 3-way mitered joining of the leg and two horizontal pieces at each corner.