Set from shapes for modeling chair rail moldings in 3ds Max. This set contains all mitered door molding shapes in one bundle. A dado rail, also known as a chair rail or surbase, is a type of molding fixed horizontally to the wall around the perimeter of a room. The dado rail is traditionally part of the dado or wainscot and, although the purpose of the dado is mainly aesthetic, the dado rail may provide the wall with protection from furniture and other contacts. Ready for use with the plugin “Sweep Profile”.