Willis Tower Download PDF


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Height: Occupied
413 m / 1,354 ft
 
Height: Architectural
442 m / 1,451 ft
 
Willis Tower Outline
  Height: To Tip
527 m / 1,729 ft
Height: Observatory
413 m / 1,354 ft
Floors Above Ground
108
Floors Below Ground
3
# of Elevators
104
Top Elevator Speed
8.1 m/s
Tower GFA
416,000 m² / 4,477,787 ft²

Facts

Official Name Willis Tower
Other Names Sears Tower
Structure Type Building
Status Completed
Country United States
City Chicago
Street Address & Map 233 South Wacker Drive
Building Function office
Structural Material steel
Construction Start 1970
Completion 1974
Official Website Willis Tower
Rankings Click arrows to view the next taller/shorter buildings
Global Ranking #10 Tallest in the World
Regional Ranking #2 Tallest in North America
National Ranking #2 Tallest in United States
City Ranking #1 Tallest in Chicago

CTBUH Initiatives

CCHRB Addresses Question: “Refurbish, Repurpose or Replace?”
11 Jun 2014 – Event Report

Tongji University Faculty and Students Visit Chicago
Oct 2013 – Tour Report

CTBUH Going Up!
5 Nov 2011 – Event

More Initiatives

CTBUH Initiatives Related to Willis Tower

CCHRB Addresses Question: “Refurbish, Repurpose or Replace?”
11 Jun 2014, Chicago – Event Report
A recent seminar of CCHRB, co-sponsored by CTBUH, thoroughly examined the question of how cities should deal with existing, outdated tall buildings.
Tongji University Faculty and Students Visit Chicago
Oct 2013, Chicago – Tour Report
“Towards Zero Carbon,” a collaborative design studio between Tongji University, CTBUH and the Illinois Institute of Technology, made a week-long visit to Chicago in November.
CTBUH Going Up!
5 Nov 2011, Chicago – Event
For the third year, some of the sports challenged staff members and friends of CTBUH participated in the SkyRise Chicago stair climbing race.
CTBUH Releases Analysis of Global Population and Tall Buildings
Apr 2011 – CTBUH Journal Paper
Tall buildings are spreading across the globe at an ever-increasing rate. This study demonstrates the relationship between population and tall buildings across those countries and presents information…
CTBUH Running Up the Willis Tower
13 Nov 2010, Chicago – Event Report
CTBUH staff braved the chance to climb up all of the 2,109 stairs to the 103rd floor of Chicago Willis (formerly Sears) Tower.
Willis/Sears Tower Tour
28 Oct 2009, Chicago – Tour Report
Members of CTBUH staff had a unique opportunity to see the in and outs of the Willis Tower (formerly Sears Tower) in Chicago.

Global News

Chicago’s Willis Tower Glass-Floor Skydeck Cracks
30 May 2014 – Chicago

Willis Tower Struck by Lightning
14 Jun 2013 – Chicago

Beloved Chicago Skyscrapers Come to Life in Animation
24 May 2013 – Chicago

More News

News Related to Willis Tower

News Image
Chicago’s Willis Tower Glass-Floor Skydeck Cracks
30 May 2014 – Chicago, United States
The Ledge, a glass-bottomed box suspended from the 103rd story of the Willis Tower’s west facade, will remain closed until the protective glass coating on its innermost…
News Image
Willis Tower Struck by Lightning
14 Jun 2013 – Chicago, United States
Photographer Scott Olson captured an image of lightning hitting the Willis Tower on Wednesday night, June 12. Severe storms passed through downtown Chicago and other part…
News Image
Beloved Chicago Skyscrapers Come to Life in Animation
24 May 2013 – Chicago, United States
Chicago is the birthplace of the skyscraper and artist Al Boardman has created a short film using motion graphics to honor five of the city's notable tall buildings. His…
News Image
Willis Tower Exhibit Celebrates Its Omnipresence in the City
19 Oct 2012 – Chicago, United States
A free exhibition of 25 large-scale photographs of Willis Tower made by architectural photographer Mark Ballogg looks to re-examine and revisit the tower's impact on the…

Videos

Tower Record
12 Nov 2013 – The Daily Show

One WTC Deemed U.S's Tallest Building
11 Nov 2013 – CNN

Short Sighted
11 Nov 2013 – Chicago Sun Times

More Videos

Videos Related to Willis Tower

Videos Related to Willis Tower

Tower Record
12 Nov 2013 – CTBUH in the Media; The Daily Show
One World Trade Center is named the tallest building in the United States by the CTBUH, igniting a rivalry between New York and Chicago.
One WTC Deemed U.S's Tallest Building
11 Nov 2013 – CTBUH in the Media; CNN
CNN reports that Chicago's Willis tower loses the height debate to the World Trade Center's Tower One citing the CTBUH ruling.
Short Sighted
11 Nov 2013 – CTBUH in the Media; Chicago Sun Times; Antony Wood, CTBUH
The Chicago Sun Times interviews Executive Director Antony Wood in their coverage of the One World Trade Center vs. Willis Tower height debate.
High Stakes, Does New York Now Have Tallest Building?
7 Nov 2013 – CTBUH in the Media; Today Show
The Today Show examines the factors that will go into the decision on if One World Trade Center or Willis Tower will be the tallest building in the United States.
From London to Chicago: The Willis Group and Tall Buildings
10 Jun 2013 – Presentation at CTBUH 2013 London Conference; Carmine Bilardello, Willis Group
From the 1970’s seminal Willis Faber Dumas Ipswich building, through 51 Lime Street London (winner of the CTBUH 2008 Best Tall Building Europe award), to the Willis (ex-…
Interview: Emerging Corporate Mobility
10 Jun 2013 – 2013 London Conference Interviews; Carmine Bilardello, Willis Group
Carmine Bilardello of Willis Group is interviewed by Jeff Herzer during the 2013 CTBUH London Conference at The Brewery, London. Carmine talks about emerging corporate…
Interview: Management of Tall Buildings
19 Sep 2012 – 2012 Shanghai Congress Interviews; Tony Long, CBRE
Tony Long of CBRE is interviewed by Jeff Herzer during the 2012 CTBUH Shanghai Congress at the Jin Mao, Shanghai. Tony talks about the management of tall buildings and…
Lynn S. Beedle Lifetime Achievement Award: 40 Years of Designing the Supertall
2 Nov 2011 – CTBUH "10th Annual Awards"; Adrian Smith, Adrian Smith + Gordon Gill Architecture
As one of the world’s foremost experts on supertall buildings, Adrian has contributed greatly to the development of this highly specialized building type. Adrian will…
Tall Tales: Interrogating the typology of the Tall Building
Oct 2011 – Presentation at CTBUH 2011 Seoul Conference; Mark Sarkisian, SOM
The ongoing and ubiquitous project of modernism has acclimated humanity to the universality of the tall building as a type. Transformations and mutations of the type have…
Chicago: 125 Years of Tall – Reflections
22 Oct 2009 – Presentation at CTBUH 2009 Chicago Conference; Mayor Richard M. Daley, City of Chicago
In the city where tall buildings began, this presentation highlights the historical trends, drivers and challenges behind tall buildings and sustainable urban development…
Interview: Retrofit of the Willis Tower
22 Oct 2009 – 2009 Chicago Conference Interviews; Adrian Smith & Gordon Gill, Adrian Smith + Gordon Gill Architecture
Adrian Smith & Gordon Gill of AS + GG Architecture are interviewed by Jeff Herzer during the 2009 CTBUH Chicago Conference at Illinois Institute of Technology, Chicago.…
Sears to Lead the Way in High Rise Upgrade
Feb 2009 – CTBUH in the Media; CNN; Antony Wood, CTBUH
Antony Wood, CTBUH Executive Director explains why the 40 year old Sears Tower needs to be upgraded to accommodate energy strategies that will improve the performance of…
A Silver Sears Tower
Feb 2009 – CTBUH in the Media; NBC 5 Chicago; Antony Wood, CTBUH
NBC 5 Chicago visits IIT’s campus to capture its view of the Sears Tower being re-covered in silver to help save on energy costs and describes the university as “one of…
Founder and First Chairman 'Lynn Beedle'
1 Nov 2008 – CTBUH Leader Presentations & Meetings; CTBUH 2008 Leader Presentation Video
Biography about Lynn Beedle and the Council on Tall Buildings, narrated by his son David and shown during the first annual awards dinner. For his 30 years of dedicated…

Browse hundreds of other videos from Council events including conferences and interviews with prominent tall building professionals in the Videos Library

Research Papers

Imagining the Tall Building of the Future
Jul 2013 – CTBUH Journal, 2013 Issue III

Tall and Urban: An Analysis of Global Population and Tall Buildings
Apr 2011 – CTBUH Journal, 2011 Issue II

Tall Buildings in Numbers: The Tallest Buildings in the World: Past, Present & Future
Jun 2008 – CTBUH Journal, 2008 Issue II

More Papers

Research Papers Related to Willis Tower

Papers Related to Willis Tower

Imagining the Tall Building of the Future
Jul 2013 – CTBUH Journal, 2013 Issue III; Josef Hargrave & Ralph Wilson, Arup
Predicting the future is an impossible task. One will never get it absolutely right. However, that does not make it a pointless exercise. Instead, such a discussion is a…
Tall and Urban: An Analysis of Global Population and Tall Buildings
Apr 2011 – CTBUH Journal, 2011 Issue II; CTBUH Research
Tall buildings are spreading across the globe at an ever-increasing rate. This study demonstrates the relationship between population and tall buildings across those…
Tall Buildings in Numbers: The Tallest Buildings in the World: Past, Present & Future
Jun 2008 – CTBUH Journal, 2008 Issue II; 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 jumped to 349…
Integrating Architecture and Structural Form in Tall Steel Building Design
Apr 2001 – CTBUH Journal, 2001 Issue II; Aysin Sev, Mimar Sinan University
This paper places the integration of structural and architectural design in an historical perspective and discusses the current approaches to the integration of…

Browse hundreds of other papers published by CTBUH members on a range of multi-disciplinary subjects in the Research Papers Library

Trivia

Tallest building in the world 1974 - 1998. Preceded by One World Trade Center and surpassed by the Petronas Tower 1