How many floors are there in American skyscrapers? How many meters is the last floor?

In the United States, buildings over 152 meters (500 feet) are generally considered as skyscrapers. The average height of each floor is about 4 meters.

Take the American spiral tower as an example:

The spiral tower is located in the center of Chicago, USA, with a height of 2,000 feet. It is a conical spiral skyscraper with seven sides.

Skyscrapers were born in Chicago, USA in the 1980s. The 10-storey "Chicago Family Insurance Building" with a height of 54.9 meters is recognized as the world's first skyscraper. This building was designed by William Lebarone Jenny, and its main purpose is to alleviate the shortage of urban land and promote commercial development. However, in less than 120 years, skyscrapers all over the world have challenged people's tolerance for height again and again, from the first Eiffel Tower, which surpassed the pyramids, to the Empire State Building, which dominated for nearly half a century, until the appearance of Taipei 10 1 0, and then to Dubai Khalifa in 20 10.