* Project led by Brock Schroeder, David Thompson, Blaine Jansen, Ian Washbrook, and Michael Lembke while employed at a previous firm.
34,374 m² (370,000 ft²)
Structural Engineering and Building Envelope Consultant
The CORE Shopping Centre, downtown Calgary’s premiere shopping complex, spans three city blocks on four levels.
In 2010, the shopping centre completed a three-year multi-million-dollar re-development. It unified the complex under a continuous 85-ft wide (26 m), 656-ft long (200 m) suspended glass roof, the largest point-supported structural glass skylight in the world at time of construction. The glass roof functions as an expansion joint that bridges all existing expansion joints in this three-block-long building.
We achieved a terraced floor system in the atrium space by extending floor plates further to the centre on lower levels. We closed existing openings, created new ones and relocated stairs and escalators to suit the new design. In so doing, we maximized exposure to the glass roof on all four levels.
The CORE added structural glass floors at the +15 level above two streets that pass below the shopping centre, as well as a structural glass bridge that spans the width of the mall’s fourth floor.
Challenge: The CORE’s new glass roof must perform both structurally and as a functioning building envelope system.
Solution: The team had to verify air and water tightness of all glass roof elements during installation. Standardized field-testing would not work on the rotules, so we developed a custom reusable air chamber that depressurizes the interior of the rotule while water was applied to the exterior. Using this bespoke testing apparatus and methodology, we identified and fixed assembly errors.