2216
Global
Height rank

Tour T1

Courbevoie
  • Facts
Height 185.0 m / 607 ft
Floors 36
Official Name
The current legal building name.

Tour T1

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

Tour GDF-Suez

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

Completed, 2008

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

France

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

Courbevoie

Address

Boulevard de la Mission Marchand - La Defense

Postal Code

92400

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.

concrete

Height
Architectural
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."

185.0 m / 607 ft

To Tip
Height is measured from the level of the lowest, significant, open-air, pedestrian entrance to the highest point of the building, irrespective of material or function of the highest element (i.e., including antennae, flagpoles, signage and other functional-technical equipment).
185.0 m / 607 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).

36

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

4

# of Parking Spaces
Number of Parking Spaces refers to the total number of car parking spaces contained within a particular building.

766

# 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).

18

Tower GFA
Tower GFA refers to the total gross floor area within the tower footprint, not including adjoining podiums, connected buildings or other towers within the development.

70,000 m² / 753,474 ft²

Rankings
  • By Location
#
2216
Tallest in the World
#
78
Tallest in Europe
#
2
Tallest in Courbevoie
#
987
Tallest Office Building in the World
#
33
Tallest Office Building in Europe
#
5
Tallest Office Building in France
#
2
Tallest Office Building in Courbevoie
#
1169
Tallest Concrete Building in the World
#
56
Tallest Concrete Building in Europe
#
4
Tallest Concrete Building in France
#
2
Tallest Concrete Building in Courbevoie
Developer
Gerald D Hines Interests
Architect
Design

Usually involved in the front end design, with a "typical" condition being that of a leadership role through either Schematic Design or Design Development, and then a monitoring role through the CD and CA phases.
Valode & Pistre Architects
Structural Engineer
Design

The Design Engineer is usually involved in the front end design, typically taking the leadership role in the Schematic Design and Design Development, and then a monitoring role through the CD and CA phases.
Terrell Group
Other Consultant

Other Consultant refers to other organizations which provided significant consultation services for a building project (e.g. wind consultants, environmental consultants, fire and life safety consultants, etc).
Façade

These are firms that consult on the design of a building's façade. May often be referred to as "Cladding," "Envelope," "Exterior Wall," or "Curtain Wall" Consultant, however, for consistency CTBUH uses the term "Façade Consultant" exclusively.
Permasteelisa Group
Developer
Gerald D Hines Interests
Architect
Design

Usually involved in the front end design, with a "typical" condition being that of a leadership role through either Schematic Design or Design Development, and then a monitoring role through the CD and CA phases.
Valode & Pistre Architects
Structural Engineer
Design

The Design Engineer is usually involved in the front end design, typically taking the leadership role in the Schematic Design and Design Development, and then a monitoring role through the CD and CA phases.
Terrell Group
Main Contractor

The main contractor is the supervisory contractor of all construction work on a project, management of sub-contractors and vendors, etc. May be referred to as "Construction Manager," however, for consistency CTBUH uses the term "Main Contractor" exclusively.
GFC + Bouygues
Other Consultant

Other Consultant refers to other organizations which provided significant consultation services for a building project (e.g. wind consultants, environmental consultants, fire and life safety consultants, etc).
Façade

These are firms that consult on the design of a building's façade. May often be referred to as "Cladding," "Envelope," "Exterior Wall," or "Curtain Wall" Consultant, however, for consistency CTBUH uses the term "Façade Consultant" exclusively.
Permasteelisa Group
Vertical Transportation
Lerch Bates Europe
Wind
Centre Scientifique et Technique du Bâtiment
Material Supplier

Material Supplier refers to organizations which supplied significant systems/materials for a building project (e.g. elevator suppliers, facade suppliers, etc).
Paint/Coating
AkzoNobel

About Tour T1

T1 Tower was conceived as a giant glass plate, folded to the south along its vertical axis and cut by a gradual arc on its north face. This dynamic shape, whose appearance changes depending on the viewer’s vantage point, assures its insertion within the complex urban context and provides a new landmark for the La Défense skyline. The tower’s horseshoe-shaped geometry provides for great panoramic platforms at each level. Its design incorporates high quality working conditions, functional efficiency, and flexible office configurations.

The tower is oriented north–south with its giant curved glass plate tracking the sun’s path through the sky. A silk-screened shading pattern on the tower’s curtain wall glazing enhances the towers thermal performance. The high level of insulation and reduced exposure of the façades reduces heat loss in the winter. Great attention was given to the building’s relationship with the environment. The architectural and technical systems provide for the comfort of the tower populace, and assure high health and safety performance. The tower is fitted with climate-controlled heating and lighting systems.

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