CIBC Square I
Toronto
Height 241.3 m / 792 ft
Floors 52
Official Name

The current legal building name.

CIBC Square I
Other Names

Other names the building has commonly been known as, including former names, common informal names, local names, etc.

81 Bay Street Tower, Bay Park Centre Phase 1, 45 Bay South Tower
Name of Complex

A complex is a group of buildings which are designed and built as pieces of a greater development.

Type

CTBUH collects data on two major types of tall structures: 'Buildings' and 'Telecommunications / Observation Towers.' A 'Building' is a structure where at least 50% of the height is occupied by usable floor area. A 'Telecommunications / Observation Tower' is a structure where less than 50% of the structure's height is occupied by usable floor area. Only 'Buildings' are eligible for the CTBUH 'Tallest Buildings' lists.

Building
Status
Completed
Architecturally Topped Out
Structurally Topped Out
Under Construction
Proposed
On Hold
Never Completed
Vision
Competition Entry
Canceled
Proposed Renovation
Under Renovation
Renovated
Under Demolition
Demolished
Architecturally Topped Out, 2021
Country

The CTBUH follows the United Nations's definition of Country, and thus uses the lists and codes established by that organization.

City

The CTBUH follows the United Nations's definition of City, and thus uses the lists and codes established by that organization.

Address
Postal Code
M5E 1Z8
Function

A single-function tall building is defined as one where 85% or more of its usable floor area is dedicated to a single usage. Thus a building with 90% office floor area would be said to be an "office" building, irrespective of other minor functions it may also contain.

A mixed-use tall building contains two or more functions (or uses), where each of the functions occupy a significant proportion of the tower's total space. Support areas such as car parks and mechanical plant space do not constitute mixed-use functions. Functions are denoted on CTBUH "Tallest Building" lists in descending order, e.g., "hotel/office" indicates hotel function above office function.

office
Structural Material

Steel
Both the main vertical/lateral structural elements and the floor spanning systems are constructed from steel. Note that a building of steel construction with a floor system of concrete planks or concrete slab on top of steel beams is still considered a “steel” structure as the concrete elements are not acting as the primary structure.

Reinforced Concrete
Both the main vertical/lateral structural elements and the floor spanning systems are constructed from concrete which has been cast in place and utilizes steel reinforcement bars.

Precast Concrete
Both the main vertical/lateral structural elements and the floor spanning system are constructed from steel reinforced concrete which has been precast as individual components and assembled together on-site.

Mixed-Structure
Utilizes distinct systems (e.g. steel, concrete, timber), one on top of the other. For example, a steel/concrete indicates a steel structural system located on top of a concrete structural system, with the opposite true of concrete/steel.

Composite
A combination of materials (e.g. steel, concrete, timber) are used together in the main structural elements. Examples include buildings which utilize: steel columns with a floor system of reinforced concrete beams; a steel frame system with a concrete core; concrete-encased steel columns; concrete-filled steel tubes; etc. Where known, the CTBUH database breaks out the materials used in a composite building’s core, columns, and floor spanning separately.

composite
Core
Reinforced Concrete
Columns
Steel
Floor Spanning
Reinforced Concrete
LEED Platinum Targeted
Official Website
Height

Height is measured from the level of the lowest, significant, open-air, pedestrian entrance to the architectural top of the building, including spires, but not including antennae, signage, flag poles or other functional-technical equipment. This measurement is the most widely utilized and is employed to define the Council on Tall Buildings and Urban Habitat (CTBUH) rankings of the "World's Tallest Buildings."

Architectural
241.3 m / 792 ft
To Tip
241.3 m / 792 ft
Occupied
208.5 m / 684 ft
Floors Above Ground

The number of floors above ground should include the ground floor level and be the number of main floors above ground, including any significant mezzanine floors and major mechanical plant floors. Mechanical mezzanines should not be included if they have a significantly smaller floor area than the major floors below. Similarly, mechanical penthouses or plant rooms protruding above the general roof area should not be counted. Note: CTBUH floor counts may differ from published accounts, as it is common in some regions of the world for certain floor levels not to be included (e.g., the level 4, 14, 24, etc. in Hong Kong).

52
Floors Below Ground

The number of floors below ground should include all major floors located below the ground floor level.

3
# of Elevators

Number of Elevators refers to the total number of elevator cars (not shafts) contained within a particular building (including public, private and freight elevators).

45
Construction Schedule
2013

Proposed

2016

Construction Start

2021

Completed

Developer
Ivanhoé Cambridge; Société immobilière Trans-Québec; Hines Canada Management Co. ULC
Architect
Structural Engineer
MEP Engineer
The Mitchell Partnership, Inc.
Contractor
EllisDon Construction Services Inc.

Acoustics

Cerami & Associates; SOTAWALL Limited

Building Monitoring

HMA Consulting, Inc.

Civil

Cole Engineering Group Ltd.

Façade Maintenance

RDP

Geotechnical

WSP

Landscape

Public Work

LEED

WSP

Life Safety

LRI Engineering Inc.

Lighting

Parking

BA Consulting Group Ltd.

Property Management

Security

Ducibella Venter & Santore; Mulvey & Banani

Traffic

BA Consulting Group Ltd.

Vertical Transportation

Soberman Engineering Inc.

Way Finding

Entro Communications Inc.

Wind

Elevator

Façade Maintenance Equipment

Tractel

Formwork

Videos

30 October 2017 | Toronto

Tall buildings have an important role in defining the character of the City and they help reduce urban sprawl. However, when a building rises above...

Research

17 October 2016

Chris Wilkinson, Wilkinson Eyre Architects

Using four tower designs on four continents – the Guangzhou International Finance Center in China, the Crown Sydney Resort Hotel in Australia, 45 Bay Street...

Global News

01 December 2020 | Toronto

This Friday, 4 December 2020, after almost two decades in service, GO Transit's old Union Station Bus Terminal will be fenced off and closed to...

30 October 2017 | Toronto

Tall buildings have an important role in defining the character of the City and they help reduce urban sprawl. However, when a building rises above...

19 October 2016 | Toronto

Wednesday, October 19, 2016. Guangzhou, China. Chris Wilkinson of Wilkinson Eyre, presents at the 2016 China Conference Plenary 5: "Beyond Guangzhou: Other Settings" Using four...

17 October 2016

Chris Wilkinson, Wilkinson Eyre Architects

Using four tower designs on four continents – the Guangzhou International Finance Center in China, the Crown Sydney Resort Hotel in Australia, 45 Bay Street...

01 December 2020 | Toronto

This Friday, 4 December 2020, after almost two decades in service, GO Transit's old Union Station Bus Terminal will be fenced off and closed to...

01 September 2020 | Toronto

Just over three years ago, a surface parking lot southeast of Union Station began its transformation into the first of two towers, part of the...