One World Trade Center

New York City
Height
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).

526.7 m / 1,728 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."

417 m / 1,368 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.

413 m / 1,355 ft
1 2 3 One World Trade Center Outline
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).

110
Height 417.0 m / 1,368 ft
Floors 110
Official Name
The current legal building name.

One World Trade Center

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

World Trade Center North Tower

Name of Complex
A complex is a group of buildings which are designed and built as pieces of a greater development.

World Trade Center

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

Demolished

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

United States

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

New York City

Postal Code

10048

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.

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."

417.0 m / 1,368 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).
526.7 m / 1,728 ft
Occupied
Height is measured from the level of the lowest, significant, open-air, pedestrian entrance to the highest occupied floor within the building.
413.0 m / 1,355 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).

110

# 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).

99

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.

8 m/s

Construction Schedule
1966

Construction Start

1972

Completed

2001

Demolished

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.

Contractor
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.

Developer
Port Authority of New York and New Jersey
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.

Minoru Yamasaki Associates; Emery Roth & Sons
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.

Contractor
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.

CTBUH Initiatives

World Trade Center: One WTC Office Building Tour

28 October 2015 - Event

World Trade Center: Urban Domain Tour

28 October 2015 - Event

Videos

20 October 2016 | New York City

Singularly Slender: Sky Living in New York, Hong Kong, and Elsewhere

Thursday October 20, 2016. Hong Kong, China. Carol Willis of The Skyscraper Museum in New York City presents at the 2016 China Conference Plenary 7:...

Research

28 October 2019

World’s Biggest (Tall) Buildings

Carol Willis, The Skyscraper Museum

In both professional circles and in the public eye, the subject of the World’s Tallest Building (WTB) has held the spotlight for more than a...

Global News

12 February 2019

Two World Trade Center in New York City May Rise Without an Anchor Tenant

One of the final pieces of the World Trade Center puzzle may be put into place—albeit in a somewhat risky fashion. Bloomberg reports that Larry...

20 October 2016 | New York City

Singularly Slender: Sky Living in New York, Hong Kong, and Elsewhere

Thursday October 20, 2016. Hong Kong, China. Carol Willis of The Skyscraper Museum in New York City presents at the 2016 China Conference Plenary 7:...

17 October 2016 | New York City

Structural & Geotechnic Engineering Q&A

Monday, October 17, 2016. Shenzhen, China. William O'Donnell, DeSimone Consulting Engineers; Dennis Poon, Thornton Tomasetti; SawTeen Seen, Leslie E. Robertson Associates, answer questions at the...

27 October 2015 | New York City

From New York to Busan: Reflecting Culture in Urban Design

Overpopulation, climate change, aging infrastructure: the threats facing tomorrow’s cities are, in many ways, design problems. The challenges of today’s world have to be solved...

26 October 2015 | New York City

Interview: Rafael Viñoly

Rafael Viñoly of Rafael Viñoly Architects is interviewed by Chris Bentley during the 2015 CTBUH New York Conference at the Grand Hyatt New York. Rafael...

28 October 2019

World’s Biggest (Tall) Buildings

Carol Willis, The Skyscraper Museum

In both professional circles and in the public eye, the subject of the World’s Tallest Building (WTB) has held the spotlight for more than a...

01 September 2018

Developments of Structural Systems Toward Mile-High Towers

Kyoung Sun Moon, Yale University School of Architecture

Tall buildings which began from about 40 m tall office towers in the late 19th century have evolved into mixed-use megatall towers over 800 m....

17 October 2016

Singularly Slender: Sky Living in New York, Hong Kong, and Elsewhere

Carol Willis, The Skyscraper Museum

This paper highlights a new 21st-century skyscraper typology – the very tall and slender residential tower – and analyzes the economic, engineering, and urbanistic forces...

11 September 2011

The Global Impact of 9/11

Leader Interviews by Jan Klerks, CTBUH

Just as many Americans still remember exactly where they were when they heard the news that US president John F. Kennedy had been shot, most...

01 September 2008

Trends, Drivers and Challenges in Tall Buildings and Urban Habitat

Antony Wood, CTBUH

This paper outlines the major influences on tall building design in the early stages of the 21st Century. At this unprecedented time in terms of...

12 June 2008

The Tallest Buildings in the World: Past, Present & Future

CTBUH Research

Over time, the average height of the 100 tallest buildings in the world has been steadily increasing. However, by 2010, this average height will have...

16 October 2005

Bridging the gap: An analysis of proposed evacuation links at height in the World Trade Centre design competition entries

Antony Wood & Philip Oldfield, University of Nottingham

This paper analyses the skybridge links of the numerous re-design proposals for the World Trade Centre Towers, with the aim of establishing their advantages and...

16 October 2005

Bridging the Gap: Proposed Evacuation Links at Height in the World Trade Center Design Entries

Antony Wood & Philip Oldfield, University of Nottingham

This paper proposes to analyse in detail the skybridge links of the WTC replacement designs – impact on evacuation, structure, façade, tower operation etc –...

16 October 2005

Tall Building Emergency Evacuation: “Time To Think Differently”

Dr. Jonathan (Yoni) Shimshoni, Escape Rescue Systems

This paper presents developments in the area of high-rise building emergency evacuation solutions, especially in three categories: Platform Devices; Chute Devices; and Controlled Descent Devices,...

10 October 2004

A Study on the Collapse Control Design Method for High-rise Steel Buildings

Akira Wada, Tokyo Institute of Tech.; Kenichi Ohi, Kobe University; Hiroaki Suzuki, University of Tsukuba et al.

This paper presents a new collapse control design method for high-rise steel building structures. The method presented here to prevent progressive collapse until the completion...

28 October 2015

World Trade Center: One WTC Office Building Tour

CTBUH 2015 delegates toured One World Trade Center Office Building which is the current tallest building in the Americas.

28 October 2015

World Trade Center: Urban Domain Tour

CTBUH 2015 delegates toured 30 Park Place which will house the Four Seasons Hotel and Private Residences Downtown New York.

20 November 2014

CTBUH Israel Plays Key Role at Building Center Summit

The CTBUH Israel Chapter was a major presence at the annual Building Center Summit, in Eilat City, drawing over 2,000 people.

6 September 2011

9/11 – Ten Years on: CTBUH Reflections

In the week that we mark the tenth anniversary of the 9/11 events and the collapse of the World Trade Center towers CTBUH reflected on the impact on tall buildings.

16 December 2009

Height: The History of Measuring Tall Buildings

This article describes some of the events which took place in the Council's long, and sometimes complex, history of measuring tall buildings.