Torre KOI in Monterrey, Mexico. Courtesy TIF Digital / www.tif.com.mx.



Thornton Tomasetti provided structural design, through design development, for a 69-story tower that is the country’s tallest. Stark+Ortiz was serving as the local engineer for the 917-foot-tall (279.5 meters) building.

The mixed-use tower houses offices, nine levels of parking and luxury apartments above the 22nd floor—dubbed “KOI Sky Residences”—that offer panoramic views of the Cerro de la Silla, the Sierra Madre and the Cerro de las Mitras mountains.

The structural system consists of post tensioned concrete flat slabs supported by concrete columns and a concrete shear wall core with post tensioned concrete waffle slabs at the garage levels. The core’s high aspect ratio posed a significant challenge for meeting wind acceleration limits. Full-story concrete belt walls at levels 21 and 61 will link the tower columns to the shear wall core to resist lateral loads and provide stiffness to minimize perceptible accelerations due to wind loads.

The project achieved LEED Silver certification.

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