The glass block is held in place by Type 316 structural supports. The Type 316 tonnage used for the pavilion, bridge and fountain is not known but it is assumed to be significant.
Chicago’s recent high-profile use of Type 316 does not stop at the borders of Millennium Park. In 2005, two new adjoining Outokumpu Type 316L clad buildings were completed on South Wacker Drive. 111 South Wacker Drive was designed by Lohan Caprile Goettsch (Chicago) and Hyatt Center (Figure 6) was designed by Pei Cobb Freed & Partners (New York). These buildings are clad in about 400 tonnes of Type 316L stainless steel. The highly publicized, new Trump Tower, which is under construction, was designed by Skidmore Owings & Merrill (Chicago) and will use about 170 tonnes of Type 316 on the exterior.
Several important Type 316 buildings exteriors were recently bid in New York. Goldman Sachs’ new Pei Cobb Freed designed world headquarters will use about 430 tonnes of Type 316L, and Sir Norman Foster’s 610 Lexington Avenue design will use about 300 tonnes of Type 316L. 7 World Trade Center, which used both Type 316 austenitic and 2205 duplex stainless steel, is nearing completion. Freedom Tower (Skidmore Owings & Merrill, New York office), which will replace the World Trade Center towers, is expected to be clad in Type 316.
Although the tonnage of stainless steel that has been or will be used for most of Millennium Park, 7 World Trade Center, and Freedom Tower is not known, about 1,400 tonnes of Type 316/316L or 28 tonnes of molybdenum have been or will be used for the other projects mentioned in this article. It is important to note that only very high profile buildings were included in this article. Many Type 316 railings, storefronts, canopies, and similar applications are specified daily in these cities.