311 South Wacker
Structure in general
- World's tallest reinforced concrete building when completed; surpassed two years later by Central Plaza in Hong Kong.
- The building's top is a large cylinder surrounded by four smaller cylinders. One prototype design included four spires around the circumference.
- The five cylinders on top are lit at night by 1,852 fluorescent tubes, creating a light bright enough to compete with the full moon.
- The front lobby is a large two-level winter garden with glazed palm trees and an 86-foot high glass roof.
- Raymond Kaskey's bronze sculpture "Gem of the Lakes" looks over the winter garden from the Wacker entrance. It depicts a large Neptunian figure drying himself over a seashell fountain.
- The lower level of the winter garden was designed to connect via underground passageway to Union Station.
- 311 South Wacker Drive is the tallest building in the world known only by its street address.
- Two towers similar to this one were planned for the lots on either side. Both sites are reserved for future development, and the northwest plot is a temporary park.
- The canopy over the sidewalk in front of the winter garden was added to the building in 2002.
- The lantern at the top changes colors for various holidays and special events.
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Also recorded for this building:
Developer, Owner, General contractor, Structural engineering, Foundation company, Elevator supplier, Escalator supplier, Tenant, Light engineering, Concrete supplier, Real estate agent, Property management, Shell construction, Surveyor, Lightning protection
Features & Amenities
- Doorman is available
- Fountain is present in building
- Ornamental illumination is installed
- Skylobby is present
- Wintergarden is present