> An elevator car hangs on steel cables inside a shaft. A pulley turns > the cables to make the car slide up or down. Climbing the stairs in a house is easy. But in a tall building with many...
A GIANT OF A BUILDING
It reaches skyward like a mighty giant. It has 110 stories and is 1,454 feet (443 meters) high. This giant of a building is Sears Tower, in Chicago, Illinois. It is the tallest building in the world....
