3038
Global
Height rank

D2 Tower

Courbevoie
  • Facts
Height 171.0 m / 561 ft
Floors 36
Official Name
The current legal building name.

D2 Tower

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

CB22, Tour D2

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, 2014

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

17 Place des Reflets, La Défense

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.

composite

Core
Reinforced Concrete
Columns
Steel
Floor Spanning
Steel
Energy Label

BREEAM Very Good; NF HQE Bâtiments Tertiaires Excellent

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."

171.0 m / 561 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).
171.0 m / 561 ft
Occupied
Height is measured from the level of the lowest, significant, open-air, pedestrian entrance to the highest occupied floor within the building.
133.8 m / 439 ft
Observatory
149.9 m / 492 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.

3

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

370

# 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).

10

Top Elevator Speed
Top Elevator Speed refers to the top speed capable of being achieved by an elevator within a particular building, measured in meters per second.

6 m/s

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.

54,500 m² / 586,633 ft²

Rankings
  • By Location
#
3038
Tallest in the World
#
109
Tallest in Europe
#
10
Tallest in France
#
6
Tallest in Courbevoie
#
1323
Tallest Office Building in the World
#
49
Tallest Office Building in Europe
#
10
Tallest Office Building in France
#
6
Tallest Office Building in Courbevoie
#
596
Tallest Composite Building in the World
#
18
Tallest Composite Building in Europe
#
2
Tallest Composite Building in France
#
1
Tallest Composite Building in Courbevoie
Construction Schedule
2010

Proposed

2011

Construction Start

2014

Completed

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.
Setec TPI
Material Supplier

Material Supplier refers to organizations which supplied significant systems/materials for a building project (e.g. elevator suppliers, facade suppliers, etc).
Steel
ArcelorMittal
Owner
Sogecap
Developer
Sogeprom; Bouygues Immobilier
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.
Agence d`Architecture A.Béchu; Atelier Tom Sheehan & Partenaires
Architect of Record

Usually takes on the balance of the architectural effort not executed by the "Design Architect," typically responsible for the construction documents, conforming to local codes, etc. May often be referred to as "Executive," "Associate," or "Local" Architect, however, for consistency CTBUH uses the term "Architect of Record" exclusively.
Agence d`Architecture A.Béchu
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.
DVVD; Setec TPI
MEP 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.
Berim; Setec Bâtiment
Project Manager

The CTBUH lists a project manager when a specific firm has been commissioned to oversee this aspect of a tall building’s design/construction. When the project management efforts are handled by the developer, main contract, or architect, this field will be omitted.
Egis
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.
GTM Batiment
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).
Certifier
Veritas
Environmental
Etamine
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.
DVVD
Interiors
Volume ABC
Landscape
Silva Landscaping; Coloco
Lighting
Benoit Lalloz; Carole Ferreri
Security
SSICOOR; Apex
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).
Cladding
Kyotec
Concrete
Lafarge Beton
Elevator
thyssenkrupp
Façade Maintenance Equipment
Tractel
Steel
ArcelorMittal

Research

01 December 2016

An Overview of Structural & Aesthetic Developments in Tall Buildings Using Exterior Bracing & Diagrid Systems

Kheir Al-Kodmany, University of Illinois; Mir M. Ali, University of Illinois at Urbana-Champaign

There is much architectural and engineering literature which discusses the virtues of exterior bracing and diagrid systems in regards to sustainability - two systems which...

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