The 69-story Torre KOI mixed-use tower in Monterrey, Mexico, topped out last week, making it the tallest building in the country. Thornton Tomasetti provided structural design to developer Internacional de Inversiones for the project. The 279-meter building was designed by VFO Architects, with Stark+Ortiz serving as the local engineer. Located in Mexico’s second largest city, the tower will serve as the centerpiece of the mixed-use VAO Complex. It will contain offices, nine levels of parking, a swimming pool on the 22nd floor and above that, luxury apartments (dubbed “KOI Sky Residences”) featuring panoramic views of the surrounding 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 link the tower columns to the shear wall core to resist lateral loads and provide stiffness to minimize perceptible accelerations due to wind. Because local building codes do not cover seismic design, the structural design team consulted various documents and codes in both Mexico and the United States. The project will seek LEED Silver certification.
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