Under no circumstances should a city pour a slab of concrete to build temporary ramps as the funds would be much better spent building a permanent concrete skatepark to begin with. Most concrete skateparks will cost between 20 and 25 dollars (USD) per square foot to build.
From the ground to the roof it is 442 meters (1,450 feet) tall. It was designed by Fazlur Khan and Bruce Graham. Willis Tower is the second-tallest building in the United States. It is the eighth-tallest freestanding structure in the world. It is one of the most popular tourist destinations in Chicago.
Today's spit take: Willis isn't the largest tenant in the Willis Tower? What? Willis Tower, formerly known as the Sears Tower, turned 40 in May 2013. The 110-story tower, once the tallest building in the Western Hemisphere, has seen many changes in residents over the years, and in 2009 a new glass ledge was introduced on the building's 103rd floor. Eric Zorn.