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Height: Occupied
447 m / 1,467 ft
Height: To Tip
553.3 m / 1,815 ft
Height: Architectural
553.3 m / 1,815 ft
CN Tower Outline
Height: Observatory
447 m / 1,467 ft
# of Elevators
Top Elevator Speed
6.1 m/s


Official Name CN Tower
Other Names Canadian National Tower
Structure Type Tower
Status Completed
Country Canada
City Toronto
Street Address & Map 301 Front Street West
Postal Code M5V 2T6
Building Function telecommunications / observation / retail
Structural Material concrete
Construction Start 1973
Completion 1976
Retrofit End 2011
Official Website CN Tower

Original Companies Involved

Developer Canadian National Railways
Design WZMH Architects; John Andrews International
Structural Engineer
Design Nicolet Carrier Dressel Associates
Material Supplier
• Construction Hoists Alimak Hek
• Elevator Otis Elevator Company

Retrofit Companies Involved

MEP Engineer
Design Mulvey & Banani
Other Consultant
• Security Mulvey & Banani

About CN Tower

World's tallest self-supported structure 1976 - 2010.

CTBUH Initiatives

CTBUH UH/UD 2017 Global Walking Tour
14 Jun-7 Jul 2017 – Event Invite

Toronto Regional Tour
29-30 Oct 2015 – Tour Report

Warm Weather Spaces Walking Tours 2015
17 Sep 2015 – Tour Report

More Initiatives

CTBUH Initiatives Related to CN Tower

Toronto Regional Tour
29-30 Oct 2015, Toronto – Tour Report
CTBUH 2015 delegates toured Toronto under the lead of CTBUH Canada. The highly successful tour led to many discussion on the lessons learned.
Warm Weather Spaces Walking Tours 2015
17 Sep 2015 – Tour Report
The CTBUH Urban Habitat / Urban Design Committee organized guided walking tours of 16 cities around the globe, focusing on urban habitats around tall buildings.
Height: The History of Measuring Tall Buildings
Dec 2009, Chicago – CTBUH News
This article describes some of the events which took place in the Council's long, and sometimes complex, history of measuring tall buildings.

Global News

Toronto's CN Tower Reimagined as Residential High-Rise Covered in Wooden Pods
10 Feb 2017 – Clusters of apartment units cling to the sides of…

Research Papers

Tall Buildings in Numbers: World’s Highest Observation Decks
Aug 2015 – CTBUH Journal, 2015 Issue III

Tall Buildings in Numbers: A New Leader for Telecom Towers
Jun 2012 – CTBUH Journal, 2012 Issue II

Tall Buildings in Numbers: Tallest World Records
Nov 2010 – CTBUH Journal, 2010 Issue IV

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