Captured and trussed to a pole, the Monster is hauled to a dungeon and chained. The structures were built of local stone with wood trussed roofs covered with corrugated metal. These struts temporarily turned each incomplete half into a trussed cantilever arm. Sometimes they were also called a "joist frame", "rib frame" and "trussed frame" barns. It is both, a (rigid) tied-arch and a cantilevered trussed arch design. Twenty-four trussed columns encase the inner bowl, each one weighing 1,000 tons. Two diagonally trussed steel walkways provide stability and access to the concrete shaft. The structural system consists of trussed steel frame. Kahn then formed his own company called Trussed Concrete Steel Company. The 3,500,000-square-foot (325,000 m), designed by Albert Kahn Associates using Trussed Concrete Steel Company products. When he lifts the warming lid, Charlie is trussed up on the plate. In 1912 Williams assumed a position as engineer and designer with the Trussed Concrete Company.