KPMB; Adamson Associates
Tower: 980,000 ft2
Podium: 100,000 ft2
Structural Engineering Consultant and Building Envelope Consultant
At 44 storeys plus an eight-storey podium, Toronto’s Bay Adelaide Centre East is a LEED Platinum project that demands significant structural innovation to bring to fruition.
The tower core is built using an ATR self-climbing system – so-called because it climbs on rails up the building by means of hydraulic jacks – so construction can proceed without the use of a tower crane.
To mitigate noise and vibration from an adjacent subway line, crews built the ground floor of the podium so that its core floats 100 millimetres above the existing B1 level. It is supported on existing columns and foundation walls using isolation pads.
Adjacent to its sister building, Bay Adelaide West, the East tower is built above an existing four-storey below-grade parkade. Crews partly demolished existing parking slabs within the tower’s footprint to build the tower’s core and concrete columns.
Challenge: The existing parkade, tenant space and adjacent underground pedestrian tunnel all had to remain operational during construction.
Solution: We prevented disruption to tenants, cars and PATH users by locating tower columns so the structure could clear span the main areas. Where necessary, built-up structural columns were “needled” through small openings in the existing slab so column erection could occur during short off-peak periods of time for parkade and tenant use.