Project led by Barry Charnish, Agha Hasan, David Thompson, and Anthony Mirvish while employed at a previous firm.
Zeidler Partnership Architects
Talon Investments: Mr. Val Levitan
59 storey building: 261 hotel rooms, 118 condo units, 226 parking stalls, 18,000 ft² spa height of 256.7 meters to architectural top
Structural Engineering and Building Envelope Consultant
At downtown Toronto’s St. Regis Hotel (formerly Trump International Hotel and Tower), short-term visitors mix with residents living in the tower’s stunning condominiums. This mixed-use tower includes variable residential floor layouts, a spa floor, hotel floors on a grid layout that differs from that of the condominiums, above-grade parking, a lobby area entry and a below-grade loading facility.
The building’s varied uses called for multiple structural systems to resist lateral wind and seismic loading, and to control the perception of wind vibration in the upper floors of the tower. Liquid slosh dampers help accomplish the latter goal.
Site constraints drove construction crews to use specialized equipment such as an automated jump form system, internal jump elevators and internalized concrete pumping systems.
Challenge: Structural design and construction logistics proved challenging due to the height of the building, the relatively small floor plate, and the only marginally bigger site area.
Solution: We maximized usable floor area by making canny structural design choices: the core was kept to a minimum size; residential elevators were stacked above the hotel elevators; and high-strength concrete columns minimize the column size intervention on the floor plate.