A matter of tension Contracted to build a six-story addition to Mount Sinai Hospital in Toronto, Vanbots Construction is using cutting-edge technology to strengthen the entire structure to withstand seismic activity. Errol Dube explains to Gay Sutton how this is being done. Any pedestrian walking down Murray Street or University Avenue in Toronto would be bound to see the construction work going on at Mount Sinai Hospital. Six new stories, some 150,000 square feet, are being built on top of the west tower, increasing its height from 14 to 20 floors.