Please excuse any mistakes this translation might have and feel free to correct them if you wish to collaborate with our project.
In 1969 Sears, Roebuck and Company was the largest retailer in the world, with approximately 350,000 employees. Its executives decided to consolidate the thousands of employees in offices throughout the Chicago area in one building on the western edge of Chicago. With the demands immediate space of 3 million square feet (279,000 m²), and with predictions and plans for the future growth that requires more space than this, architects Skidmore knew that the building would be one of the office buildings largest in the world.
Commissioned by Sears, Roebuck and Company, was designed by chief architect Bruce Graham and structural engineers Srinivasa and Fazlur Khan of Skidmore, Owings and Merrill.
Construction began in August 1970 and the building reached its maximum height expected to top the May 3, 1973.
The Tower is strategically located on the Paseo Wacker in the heart of the West Coast, the first submarket of Chicago and home of its largest corporations and railway stations for people living outside the city.
Sears Tower is an office of 110 contemporary and attractive levels which consists of steel columns and beams in a system "megamódulo."
Other services include a platform for the dissemination of world-class, the highest Skydeck, the conference center, health facility, and features exceptional technology. It rises to an altitude of 1450 feet and is one of the most recognizable signs on the horizon for Chicago and the world. Torre said the record of being the tallest building worldwide for 25 years until the Petronas Towers in Kuala Lampur, Malaysia was built in 1998.
the Sears Tower in its structure supports square tubes of welded steel, the floors are suspended from the tubes, a technological innovation of architectural engineer Fazlur Kahn.
An engineer discovered that a building constructed of a series of tubes would be lighter and stronger than a building constructed with a traditional steel skeleton. Nine tubes that come out from the base intact and get to the floor 50. Since then the number of tubes going to decline to become only two steel pipes from the ground level to the top 90.
The Sears Tower has an aluminum exterior with black crystals bronze cut by black lines.