Northwestern Medicine Outpatient Care Facility in Chicago.
Northwestern Medicine’s new 975,000-square-foot Outpatient Care Facility houses an ambulatory surgery center, advanced diagnostic and therapeutic floors, patient examination rooms and suites and medical office space. Thornton Tomasetti provided structural engineering for the award-winning 25-story facility that includes 14 levels of medical space, seven levels of parking, a lobby with retail and mechanical floors. A covered drive-through provides patients and medical staff a protected drop-off area, and connectivity to adjacent medical facilities and parking was provided via two second-floor skybridges and a tunnel. To span the city streets below, the 80-foot-long north skybridge uses W40 steel girders and the 98-foot-long east skybridge uses W44 steel girders.
The tightly confined 45,000-square-foot site required transferring loads from the shear wall into the building using cantilevered grade beams. The design team utilized a universal grid system to create flexible program space for the steel-framed medical floors, which sit atop a seven-level concrete parking garage with dissimilar column spacing. Thornton Tomasetti designed a system of multibay column transfers where the medical and parking garage levels interface to reconcile the differing column locations.
Sustainable design features include planted green roofs, stormwater detention tanks and the use of recycled cementitious materials in the concrete elements.
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