Designed in the 1960s willis tower like its contemporaries was built atop a base to separate the urban streetscape from the building and to minimize the number of people walking along the sidewalk.
Floor plans sears tower.
The new plans break this barrier blending the building into the city it calls home and re energizing the downtown area.
The stepped back profile reminiscent of skyscrapers of the 1920s is a solution to the engineering challenge of supporting such a tall tower.
It was also the tallest building in the western hemisphere for 41 years until the new one world.
Built for sears roebuck and company the structure reaches 110 floors and a height of 1 450 feet 442 metres.
The surface is divided into 110 apartments 108 above ground which is accessed with 104 elevators 16 of which are double height.
Sears tower is an attractive and modern office with a floor area of 418 64 square meters of which are rentable 353 961 m.
The stepback geometry of the 110 story tower was developed in response to the interior space requirements of sears roebuck and company.
At 1 454 feet and 110 stories tall the willis tower formerly known as sears tower was the world s tallest building from its construction in 1974 until 1998.
The configuration incorporates the unusually large office floors necessary to sears operation along with a variety of smaller floors.
The willis tower formerly and informally.
Willis tower formerly 1973 2009 sears tower skyscraper office building in chicago illinois located at 233 south wacker drive that is one of the world s tallest buildings the sears tower opened to tenants in 1973 though construction was not actually completed until 1974.
Sears tower commentary the sears tower was the world s tallest building.