Willis Tower | |
---|---|
Former names | Sears Tower (1973–2009) |
Record height | |
Tallest in the world from 1973 to 1998[I] | |
Preceded by | World Trade Center |
Surpassed by | Petronas Towers[4] |
General information | |
Status | Completed |
Type | Office, observation, communication |
Architectural style | International |
Location | 233 S. Wacker Drive Chicago, Illinois 60606 United States |
Coordinates | 41°52′44″N 87°38′09″W / 41.8789°N 87.6358°W / 41.8789; -87.6358 |
Current tenants | |
Named for | Willis Towers Watson Sears (1973–2009) |
Construction started | 1970; 54 years ago (1970) |
Completed | 1974; 50 years ago (1974) |
Opening | September 1973; 51 years ago (September 1973) |
Owner | Blackstone Group[2] |
Height | |
Architectural | 1,451 ft (442 m)[1] |
Tip | 1,729 ft (527 m)[1] |
Top floor | 1,354 ft (413 m)[1] |
Technical details | |
Floor count | 110 (+3 basement floors)[3] |
Floor area | 4,477,800 sq ft (416,000 m2)[1] |
Lifts/elevators | 104,[1] with 16 double-decker elevators, made by Westinghouse, modernized by Schindler Group and recently modernized by Otis Elevator Company |
Design and construction | |
Architect(s) | Skidmore, Owings & Merrill[1] Fazlur Rahman Khan Bruce Graham |
Engineer | Jaros, Baum & Bolles (MEP), Aon Fire Protection Engineering, formerly Schirmer Engineering Corporation (Fire)[1] |
Structural engineer | Skidmore, Owings & Merrill |
Main contractor | Morse Diesel International |
References | |
I.
^ "Willis Tower". Emporis. Archived from the original on September 23, 2015.{{cite web}} : CS1 maint: unfit URL (link)[1] |
Willis Tower | |
---|---|
Former names | Sears Tower (1973–2009) |
Record height | |
Tallest in the world from 1973 to 1998[I] | |
Preceded by | World Trade Center |
Surpassed by | Petronas Towers[4] |
General information | |
Status | Completed |
Type | Office, observation, communication |
Architectural style | International |
Location | 233 S. Wacker Drive Chicago, Illinois 60606 United States |
Coordinates | 41°52′44″N 87°38′09″W / 41.8789°N 87.6358°W / 41.8789; -87.6358 |
Current tenants | |
Named for | Willis Towers Watson Sears (1973–2009) |
Construction started | 1970; 54 years ago (1970) |
Completed | 1974; 50 years ago (1974) |
Opening | September 1973; 51 years ago (September 1973) |
Owner | Blackstone Group[2] |
Height | |
Architectural | 1,451 ft (442 m)[1] |
Tip | 1,729 ft (527 m)[1] |
Top floor | 1,354 ft (413 m)[1] |
Technical details | |
Floor count | 110 (+3 basement floors)[3] |
Floor area | 4,477,800 sq ft (416,000 m2)[1] |
Lifts/elevators | 104,[1] with 16 double-decker elevators, made by Westinghouse, modernized by Schindler Group and recently modernized by Otis Elevator Company |
Design and construction | |
Architect(s) | Skidmore, Owings & Merrill[1] Fazlur Rahman Khan Bruce Graham |
Engineer | Jaros, Baum & Bolles (MEP), Aon Fire Protection Engineering, formerly Schirmer Engineering Corporation (Fire)[1] |
Structural engineer | Skidmore, Owings & Merrill |
Main contractor | Morse Diesel International |
References | |
I.
^ "Willis Tower". Emporis. Archived from the original on September 23, 2015.{{cite web}} : CS1 maint: unfit URL (link)[1] |