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Tag: willis tower

Chicago’s “Loop” skyline above 520″

Chicago’s skyline in the loop is dominated by two buildings, Trump Tower and Willis Tower (formerly the Sear’s Tower). The design of the Sear’s Tower remains relevant, strong and continues to serve as a benchmark for highrise construction. Keeping all politics aside (please) will the Trump Tower remain relevant 35 years from now? Certainly, glass and steel is a common design in large American cities, but is Trump distinctive enough to pass the test of time or will it seem dated in a few decades. From my eyes, it’s a stunning beauty right now and helps anchor the Chicago skyline.

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The Sears Tower currently known as Willis Tower

sears-tower

Following written copy from the Chicago Architecture Foundation.
Architects have always been tasked with designing tall buildings to resist wind loads. But as buildings continued to grow taller and taller, new solutions were required. When this 110-story tower was designed, architect Bruce Graham and structural engineer Fazlur Khan of Skidmore, Owings & Merrill (SOM) utilized the bundled tube system to address structural problems never before seen at this scale. Their use of the innovative system ushered in a whole new era of skyscrapers.

The tower is comprised of a cluster of nine tubes connected together to act as a single unit. The tubes support one another, strengthening the structure as a whole. Meanwhile, the variations in tube height disrupt the force of the wind.

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