This corrosion bowed the horizontal mullions and broke most of the spandrel glass panels. The spandrels have been strengthened by steel spandrel ties. Together, the span arch and spandrel arches form a truss. It incorporates brushed stainless steel spandrel panels and clear anodized aluminum. The area between the arch and the deck is known as the spandrel. The steel spandrel bridge design was constructed by the Kansas City Structural Steel Company. Column bases and spandrel reliefs are from the time of Constantine. Byproduct theories view religion as a spandrel. The width at the top of the spandrel wall copings is . In 1979 he and Stephen Jay Gould introduced the term "spandrel" into evolutionary theory. The entire right spandrel has an unfinished look. Rigid insulation is provided in spandrel areas to provide a higher R-value at these locations. He argues it is not entirely clear what is and is not a spandrel. Towsan (version of AT-5 Spandrel), Toophan (version of BGM-71 TOW); and European-made MILAN missiles.