CN Tower – Toronto, Canada
The CN Tower shaft is slipformed up to level 446 m and is still today the highest construction made using slipform technology. Together with the slipform rig, a tower crane was lifted on the journey up to the top using at most 54 nos slipform jacks type R72. As the slipform became narrower, the steel and wood were cut away from the outer ends (the number of jacks was reduced to 24) and lowered to the ground.
When the observation deck “the SkyPod” began to be built later in the same year, the working platform, consisting of 12 brackets, was raised with the help of 45 nos of our steel rod climbers, type 2510-40-UD-W, specially equipped for strand lifting.
The slipform was designed and supplied by Scanada (aka. Heede International at the time) who then and now use our jack technology.
Total height 553 m, slipformed up to level 446 m. The CN-Tower held the record for the world’s tallest free-standing structure for 32 years, from 1975 until 2007, when it was surpassed by the Burj Khalifa.
https://bygging-uddemann.com/2024/02/15/50th-anniversary-of-the-slipforming-of-cn-tower/
Location:
Toronto, Canada
Client:
Canada Cement Company (aka. the Cement Foundation Company of Canada at the time), Scanada (aka. Heede Inte’time).
Architect:
John Andrews, Webb Zerafa, E.R. Baldwin, and Menkes Housen
Scope of Supply:
Hydraulic technology for raising the slipform and heavy lifting of the work platform for the SkyPod.
Total height:
553 metres.
Time of execution:
1973 – 1974
