Engineering “One Bloor West”, Canada’s first supertall structure

Speakers: Daniel Snodgrass - RJC Engineers 00:00:00 - 00:11:42 Tim Verhey - Walters Group 00:12:26 - 00:20:00 Joseph Dardis, P.E. - ArcelorMittal 00:21:11 - 00:36:06 Marion Charlier – ArcelorMittal Steligence® 00:36:21 - 00:44:49 Questions 00:44:50 - 1:01:38 See how a landmark super‑slender Toronto tower was made feasible through hybrid structural thinking, high‑strength A913 steel, and bold prefabrication. This webinar brings structural engineers, fabricators and steel producers together to explain the composite mega‑column strategy, shop‑assembled modular columns with preinstalled rebar, forged node solutions, and the wind‑ and shortening‑driven analyses that informed the design. Learn practical lessons about weight savings, crane limits, fabrication QC, and a new mega‑column pre‑design tool—plus where to get the technical leaflet and how to join the software testing phase. Composite mega‑columns and hybrid steel/concrete transfer systems can enable large column‑free retail podiums under super‑tall slender towers. A913 QST high‑strength steel reduces member sizes, weld volumes and crane/lift issues, producing both material and constructability savings. Early collaboration among engineers, fabricators and node manufacturers, plus offsite modular prefabrication (preinstalled rebar, milled bearing surfaces, trial shop assembly) and rigorous QC, are decisive for schedule, fit‑up and performance. Time‑dependent column shortening and wind effects must be explicitly modeled and managed in sequencing.