4 November 2016 - CTBUH News
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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."
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).
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."
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).
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).
The number of floors below ground should include all major floors located below the ground floor level.
The current legal building name.
Other names the building has commonly been known as, including former names, common informal names, local names, etc.
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.
The CTBUH follows the United Nations's definition of Country, and thus uses the lists and codes established by that organization.
The CTBUH follows the United Nations's definition of City, and thus uses the lists and codes established by that organization.
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.
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.
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."
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).
The number of floors below ground should include all major floors located below the ground floor level.
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.
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2007 CTBUH Awards
2016 CTBUH Awards
4 November 2016 - CTBUH News
22 June 2016 - Awards
03 November 2016 | New York City
Sophisticated, distinctive, and transformative, Hearst Tower has profoundly impacted the skyscraper typology through its first decade of existence. Rarely has a tower so successfully integrated...
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Atop the hollowed shell of the landmark office building erected in 1928, The Hearst Headquarters became the first New York City commercial office building to achieve Gold LEED Certification from the US Green Building Council.
Using 26% less energy than a building constructed to normal code, the Hearst Headquarters features a distinct, thermal efficient diagrid design that provides an open interior with a panoramic view over Central Park. The building’s unique design saved 2,000 tons of steel, involved 90% of steel made from recycled material and required only 10% of all materials to be imported during construction, reducing overall cost and emissions.
A 14,000 gallon reclamation tank was introduced to recycle rainwater from the building’s rooftop to supplement cooling systems, water plant life and support the building’s innovative “Icefall” water feature that controls lobby temperature and humidity. The system reduces the tower’s sewer runoff by 25%.
Hearst’s additional “green” features include: variable air volume system, central air handling units on the 18th floor, temperature control units on each floor, radiant floors to heat the lobby, 100% outside air purge cycle for operational flexibility and post construction indoor air quality management, daylight sensors, humidity sensors and controls, low emissions materials, CO2 sensors for demand controlled ventilation and VOC sensors.
2007 CTBUH Awards
2016 CTBUH Awards
03 November 2016 | New York City
Sophisticated, distinctive, and transformative, Hearst Tower has profoundly impacted the skyscraper typology through its first decade of existence. Rarely has a tower so successfully integrated...
03 November 2016 | New York City
Louis Nowikas, Vice President, Hearst Corporation, is interviewed by Chris Bentley regarding the 2016 CTBUH Tall Building 10 Year Award Winner, the Hearst Tower, New...
05 March 2008 | New York City
Bart Sullivan, WSP Cantor Seinuk, presented the new $500million Hearst Corporation headquarters at the CTBUH 8th World Congress in Dubai. This 46-story, 600 ft tall,...
03 March 2008 | New York City
Michael Deane, Turner, talked about the role of the builder in delivering sustainable tall buildings at the CTBUH 8th World Congress in Dubai. Using projects...
25 October 2007 | New York City
The CTBUH 6th Annual Awards Dinner, set within the atmospheric setting of Mies van der Rohe’s iconic Crown Hall at the Illinois Institute of Technology,...
01 March 2018
The emergence of tall buildings in the late 19th century was possible by using new materials and separating the role of structures and that of...
01 December 2016
There is much architectural and engineering literature which discusses the virtues of exterior bracing and diagrid systems in regards to sustainability - two systems which...
01 December 2016
Efficiencies in the strength and stability of truss systems have been understood since the Middle Ages. The major impetus for widespread use of the truss...
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The diagrid structural system for constructing tall buildings is a recent invention. Debuting in 2004 with the construction of the Swiss Re Tower in London,...
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This paper describes the challenges met in preserving the façade and how the choice of a diagrid system - a highly efficient triangulated truss tube...
06 May 2019 | New York City
Amidst the ongoing evolution of the Manhattan skyline, one of the most notable recent changes has been the completion of the Midtown East rezoning, which...
4 November 2016
The CTBUH Awards Jury named Shanghai Tower, Shanghai as the “2016 Best Tall Building Worldwide” at the 15th Annual CTBUH Awards Ceremony and Dinner.
22 June 2016
CTBUH is proud to announce the winners and finalists for the CTBUH 2016 Tall Building Awards, chosen from a pool of 132 submissions vying for recognition.
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