Located in downtown Chicago, 111 South Wacker is a 53-story, 1,457,000-square-foot building that focuses on flexibility, efficiency and economy for tenants. Each office floor was designed to be entirely free of interior columns. The floor plan features re-entrant northwest and southwest corners, with perimeter columns held back, to provide six column-free corner offices on each floor. The building’s efficient center core allows for a 50-foot lease span east and west of the core, and a 60-foot span to the north and south. The plan also maximizes exterior views of the skyline and interior daylighting. Tenant amenities include a 10,000-square-foot fitness center and a comparably sized conference center. A 389-stall parking garage provides public parking as well as tenant-reserved spaces, with direct elevator access to mid- and high-rise floors.
111 South Wacker incorporates some of the latest office building technology. Certain features include multiple telecom risers, raised floors, a centrally located “net pop” room, and capacity for redundant energy and cooling systems. The HVAC system utilizes low-temperature air distribution that allows a 10% reduction in the size of the shafts and ducts and provides automatic dehumidification in warmer months of the year.
The building’s base features a distinctive cylindrical lobby enclosed with a 44-foot-high water-white, non-reflective glass wall supported by one-inch-diameter vertical cables. Inside, a textured, marble-clad center core is encircled by the building’s parking ramp. The underside of this ramp is exposed and showcased with accent lighting. The ramp provides a dynamic spiraling ceiling that culminates at the soffit level a full 44 feet above the plaza.
111 South Wacker was designed from the outset with an emphasis on sustainability and, ultimately, LEED certification in mind. The project took a major sustainable design initiative in reusing the existing caissons and foundations. Attention was also given to using high-performance glazing, a high-insulating building envelope, high-efficiency chillers, and digitally controlled HVAC and lighting systems. The project features a green roof and uses many materials that incorporate a high recycled content. As a result of the sustainable design initiatives, 111 South Wacker was recognized by the U.S. Green Building Council in the LEED Core and Shell (LEED-CS) pilot program, becoming the first-ever project certified LEED-CS Gold.