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Sky City
Changsha
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Metrics
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Height
838.0 m / 2,749 ft
Floors
202
Official Name
The current legal building name.
Sky City
Other Names
Other names the building has commonly been known as, including former names, common informal names, local names, etc.
J220, Yuanwang Mansion
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
Never Completed
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
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.
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.
hotel / residential / education / hospital / 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.
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.
steel
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."
838.0 m / 2,749 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).
838.0 m / 2,749 ft
Occupied
Height is measured from the level of the lowest, significant, open-air, pedestrian entrance to the highest occupied floor within the building.
733.5 m / 2,406 ft
Observatory
733.5 m / 2,406 ft
Helipad
Height, measured from the level of the lowest, significant, open-air, pedestrian entrance, to the building's helipad.
739.8 m / 2,427 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).
202
Floors Below Ground
The number of floors below ground should include all major floors located below the ground floor level.
6
# of Hotel Rooms
Number of Hotel Rooms refers to the total number of hotel rooms contained within a particular building.
250
# 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).
93
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.
18 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.
1,050,000 m² / 11,302,106 ft²
Construction Schedule
2012
Proposed
2013
Construction Start
Owner/Developer
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.
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.
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.
You must be a CTBUH Member to view this resource.
Owner/Developer
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.
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.
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.
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).
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).
Wind
BMT Fluid Mechanics Ltd.
CTBUH Initiatives
CTBUH Releases Year in Review: Tall Trends of 2014
31 December 2014 - CTBUH Journal
World Architecture Day Prefab Panel Debates on “Factory-Made”
11 October 2013 - Event
Videos
12 June 2013 | Changsha
Zhang Yue of China Broad Group is interviewed by Jeff Herzer during the 2013 CTBUH London Conference at The Brewery, London. Zhang talks about Sky...
Research
31 December 2014
Year in Review: Tall Trends of 2014
Daniel Safarik, Antony Wood, Marty Carver & Marshall Gerometta, CTBUH
An All-Time Record 97 Buildings of 200 Meters or Higher Completed in 2014 and 2014 showed further shifts towards Asia, and also surprising developments in...
Videos
12 June 2013 | Changsha
Zhang Yue of China Broad Group is interviewed by Jeff Herzer during the 2013 CTBUH London Conference at The Brewery, London. Zhang talks about Sky...
12 June 2013 | Changsha
Sky City: World's Next Tallest
The China Broad Group captured the imagination of the entire world with the time lapse video of their 30-story pre-fabricated tower being erected in just...
21 September 2012 | Changsha
Interview: Broad Sustainable Building
Ying Tang of Broad Sustainable Building is interviewed by Jeff Herzer during the 2012 CTBUH Shanghai Congress at the Jin Mao, Shanghai. Ying Tang discusses...
21 September 2012 | Changsha
Interview: Prefabrication in the Tall Building Industry
Andy Davids of Hyder Consulting is interviewed by Jeff Herzer during the 2012 CTBUH Shanghai Congress at the Jin Mao, Shanghai. Andy discusses the 838-meter...
20 September 2012 | Changsha
Interview: China's Future Tallest
David Malott of Kohn Pedersen Fox Associates is interviewed by Jeff Herzer during the 2012 CTBUH Shanghai Congress at the Jin Mao, Shanghai. David discusses...
19 September 2012 | Changsha
Interview: Leadenhall Building
David Scott of Laing O'Rourke is interviewed by Jeff Herzer during the 2012 CTBUH Shanghai Congress at the Jin Mao, Shanghai. David talks about prefabrication...
19 September 2012 | Changsha
The Next Generation of Ultra High-Rise Buildings
In recent times, several invitations have been issued by Governmental and Private Bodies to develop the next tallest building in the world, often with target...
18 September 2012 | Changsha
Interview: Shanghai Tower and Ping An Finance Center
Dennis Poon of Thornton Tomasetti is interviewed by Jeff Herzer during the 2012 CTBUH Shanghai Congress at the Jin Mao, Shanghai. Dennis discusses two megatall...
18 September 2012 | Changsha
Interview: Tall Construction in China
Timothy Johnson of NBBJ is interviewed by Jeff Herzer during the 2012 CTBUH Shanghai Congress at the Jin Mao, Shanghai. Timothy discusses the future of...
Research
31 December 2014
Year in Review: Tall Trends of 2014
An All-Time Record 97 Buildings of 200 Meters or Higher Completed in 2014 and 2014 showed further shifts towards Asia, and also surprising developments in...
30 October 2013
Debating Tall: Is Sky City's Prefabricated Approach Viable for the Future of Megatall Buildings?
At the CTBUH London Conference in June 2013, Chairman Zhang Yue of Broad Group presented on Sky City, the next-planned world’s tallest building, to be...
CTBUH Initiatives
Filter by
31 December 2014
CTBUH Releases Year in Review: Tall Trends of 2014
An All-Time Record 97 Buildings of 200 Meters or Higher Completed in 2014 and 2014 showed further shifts towards Asia, and also surprising developments in building functions and structural materials.
11 October 2013
World Architecture Day Prefab Panel Debates on “Factory-Made”
CTBUH Executive Director Antony Wood led a panel focused on the exigencies of pre-fabrication and modular construction.
24 July 2013
Atlantic Yards B2 – Modular on the Rise
It seems increasingly evident that 2013 will be remembered as The Year of Prefab in the tall-building community. At 32 stories, B2 promises to become the tallest modular building.
15 August 2012
Inside the China Broad Group
CTBUH’s Executive Director tours the headquarters of the company behind the 30-story tower erected in 15 days. Now they want to build the world’s tallest tower in nine months.
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