Hegau Tower
Singen
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."

1
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).

70 m / 230 ft
2
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."

67.5 m / 221 ft
3
Occupied:

Height is measured from the level of the lowest, significant, open-air, pedestrian entrance to the highest occupied floor within the building.

59.5 m / 195 ft
Floors

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).

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).

18
Below Ground

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

1
1 2 3 Hegau Tower Outline
Height 67.5 m / 221 ft
Floors 18
Official Name

The current legal building name.

Hegau Tower
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.

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
78224
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

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
67.5 m / 221 ft
To Tip
70 m / 230 ft
Occupied
59.5 m / 195 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).

18
Floors Below Ground

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

1
# of Hotel Rooms

Number of Hotel Rooms refers to the total number of hotel rooms contained within a particular building.

13
# of Parking Spaces

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

91
# 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).

3
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.

17,056 m² / 183,589 ft²
Construction Schedule
2002

Proposed

2006

Construction Start

2008

Completed

Owner/Developer
GVV Singen
Architect
Riede Architekten
Structural Engineer
MEP Engineer
IB Schwarz

(not specified)

Schreiber Ingenieure
Contractor
Züblin

Electrical

Gessler

CTBUH Awards & Distinctions

Best Tall Building Europe 2010 Award of Excellence

2010 CTBUH Awards

CTBUH Initiatives

Hegau Tower Chosen as Featured Building


15 October 2013 - Featured Building

18 October 2012 - Awards Symposium Video

Videos

11 June 2013 | Singen

In our journey from Chicago to New York, the United States, South Africa, Europe, the Mideast to Asia/China, the tall building has always been tied...

About Hegau Tower

Simplicity of form and selective use of materials emphasizes the fundamental design idea behind the building—to formulate a clear statement of modernism. The building’s components, structure and envelope, as well as the users and their activities within, are clearly legible through the transparent façades. The south west facing façade expands beyond the building volume vertically and horizontally. The screens form one continuous glass sheet along the forecourt, connecting both the low and high building components into one.

The tower is constructed as a concrete frame with stiffening core and perimeter columns. Structure and façade are designed for flexibility in office layouts and allow for an open plan or cellular offices as well as multiple tenants per floor. The raised floor provides the opportunity to revise electrical and data caballing systems as technology progresses. Lightweight partition systems allow fast and inexpensive adaptation of changing space requirements. The use of a single secured stair as escape route for the users improves an economy to the building with its relatively small floor plate.

The interaction between all heating, ventilation and cooling components and their joint reaction to the exterior condition forms a complex and efficient system. Fan assisted heating and cooling convectors receive fresh air supply through the façade and bring in conditioned air directly without detour through centralized units. Heat recovery is achieved by running the return air through a heat exchanger, transferring its energy to the medium water for the thermal mass system.

Natural ventilation is provided by hopper windows operated by chain motors and held by scissor hinges. This allows the user to utilize fresh air for cooling, improvement of air quality and the experience of a connection to the outside.

The flat concrete slab is equipped with PVC water tubes to cool and heat the exposed thermal mass of the structure. The mass absorbs heat during the day and is cooled off actively and passively during the night. 30% of the basic cooling is thus covered without the need of energy and space consuming air convection.

The façade module of 2.7m (8.9ft) generates a generous ambiance of space. A windproof, exterior automatic operable sunshade on the south west façade allows for reduction of solar loads along with automatic interior perforated louvers on the other three façades. The exterior sunshade is a retractable curtain of stainless steel bars. Either by sensors or the user’s command, the sunshade covers the entire façade reducing the solar load to a minimum while still providing a visual connection to the outside. The shading screen is highly wind resistant and has had its first large scale application in the Hegau Tower project.

While the façade is clearly a very strong element in the project, it does not just determine the visual appearance of the building, but importantly, it also forms the interface between its interior and the exterior in respect to thermal, acoustic and visual exchange. The basic design of the building’s façade consists of large sheets of high-performance insulated glass with a transparent appearance yet effective sun-shading values. This basic and economic principal is amended by flexible components which allow the envelope to react to the requirements of the inner and conditions of the outer environment.

The façade becomes an integral part of the structure and technology of the building and a direct expression of the economical and ecological goals set forth in its design. The building’s appearance consequently is in keeping with the urbanistic, aesthetic and technological relevance of the project for the city, region and the time of its inception.

CTBUH Awards & Distinctions

Best Tall Building Europe 2010 Award of Excellence

2010 CTBUH Awards

11 June 2013 | Singen

In our journey from Chicago to New York, the United States, South Africa, Europe, the Mideast to Asia/China, the tall building has always been tied...

18 October 2012 | Singen

Never predictable, never simplistic, Helmut Jahn has developed a complex portfolio of iconic buildings around the world. Standout projects include the Sony Center in Berlin,...

15 October 2013

Hegau Tower Chosen as Featured Building

The simplicity of form and elegance of this all glass prism are pristinely executed. What sets this tower apart however, are the automatic sunshades on the south west façade.

18 October 2012

Never predictable, never simplistic, Helmut Jahn has developed a complex portfolio of iconic buildings around the world. Standout projects include the Sony Center in Berlin, Xerox Center in Chicago, Liberty Place in Philadelphia and the MGM Veer Towers in Las Vegas. Once defined as a modernist, he broke away from rigid labels to create his own blends of efficient structures, paving the way for a new era of sustainable buildings.