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Chicago

Willis Tower in , ,

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Facts

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
bank branch
restaurant
parking

floors (above ground)

108

floors (underground)

4

architectural style

international style

facade material

aluminum

facade system

curtain wall

facade color

black

features

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

perimeter form

square

frame material

steel

foundation system

caisson foundation

roof form

flat roof with box(es)

framing system

bundled tube

height (tip)

527.00 m

height (architectural)

442.14 m

height (building mass)

442.14 m

height (roof)

442.14 m

height (main roof)

436.49 m

height (top floor)

412.69 m

height (observation floor)

412.69 m

height floorplate to floorplate

3.92 m

gross floor area

416 000.00 m²

length

68.58 m

width

68.58 m

elevator speed (max)

8.10 m/s

number of elevators

104

number of revolving doors

11

Events

1970 - foundation work begins
1973-5 - framework completed
1974 - completion
1981-5-25 - climber scales the outside

Recognitions

No recognitions listed.

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Involved companies

structural engineering

property management

elevator manufacturer

architectural metalwork fabricator

electrical contractor

facade engineering

facade fabricator

foundation company

foundation company

geotechnical engineering

Edit company STS

lightning protection fabricator

mechanical engineering

roofing manufacturer

sealants & adhesives manufacturer

steel fabricator

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Weblinks

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