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Chicago

Willis Tower in , ,

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name

Willis Tower

other name

Sears Tower

address

233 South Wacker Drive

postal code

60606

coordinates

-87.63590109325412 41.8788760058813

structural form

supertall building

status

completed

primary use

commercial office

secondary use

tea house
bakery cafe
parking
restaurant
bank branch

floors (above ground)

108

floors (underground)

4

architectural style

international style

facade material

aluminum

facade system

curtain wall

facade color

black

features

indoor observation floor
doorman
double-decker elevators
entrance canopy
transmission mast
aircraft warning lights
well known worldwide
sprinkler system
video camera surveillance
automated teller machine
skylobby

perimeter form

square

frame material

steel

foundation system

caisson foundation

roof form

flat roof with box(es)

framing system

bundled tube

height (tip)

527.0 m

height (architectural)

442.1 m

height (building mass)

442.1 m

height (roof)

442.1 m

height (main roof)

436.5 m

height (top floor)

412.7 m

height (observation floor)

412.7 m

height floorplate to floorplate

3.9 m

gross floor area

416000.0 m²

length

68.6 m

width

68.6 m

elevator speed (max)

8.1 m/s

number of elevators

104

number of revolving doors

11

Manage Events

1970: foundation work begins
1973-05: framework completed
1974: completion
1981-05-25: climber scales the outside

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Rating

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Willis Tower
6.8 stars out of 10 based on 5 reviews.
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