Fabricated from steel manufactured at Bethlehem Steel. Materials include carbon steel, stainless steel, and aluminum. The building is clad with durable stainless steel. New materials arrived, including chrome plating, stainless steel, and plastic. Today both carbon steel and stainless are used. Claws are commonly made of stainless steel or plastic or both. Hypochlorite solutions are corrosive to common container materials such as stainless steel and aluminium. Vinegar is known as an effective cleaner of stainless steel and glass. There are two subgroups of austenitic stainless steel. The latter occurs in the "Stainless Steel" hybrid. Cages are of plastic-coated galvanized steel or wood. Some systems combine stringers and supports into steel or aluminum trusses. For forming limit curves of materials aluminium, mild steel and brass. Extensive experience is available with iron, steel, and aluminium. This produced steel with alternating layers of steel and iron.