138,762 m² (1,493,620 ft²)
Structural Engineering Consultant
Located in downtown Toronto, 385 Yonge is a striking residential mixed-use development featuring two tall towers connected by an amenity bridge.
Adding to the urban density of this rapidly revitalizing neighbourhood, 385 Yonge is comprised of two residential towers containing over 1,100 residential units, rising above a 9-storey podium, with heights of 73 and 62-storeys connected by a two-storey amenity skybridge at the 51st and 52nd floors. The facades of two heritage buildings on the site will be integrated into the new development. The 10th and 11th floors will consist of 26 two-storey townhomes with terraces – a rarity among urban residential developments. In addition, the skybridge features a cantilevered portion extending out beyond the south tower creating an interesting visual aesthetic.
Challenge: Maximize the building’s performance by limiting lateral deflection and perceptible acceleration under wind and seismic loads while minimizing in-suite structure.
Solution: Walls along the building corridors were utilized to provide an enhanced core in addition to the walls around the elevators and stairs. This allowed concrete walls between the suites to be reduced in thickness increasing sellable space. The enhanced core’s “box” shape provided inherently superior resistance to building twisting movements and acceleration. An alternate perimeter tube system that eliminated virtually all interior structure other than the elevator/stair core was also developed, and is under study by the owner.