Cómo se construye un rascacielos (How a Skyscraper Is Built)

The towering buildings that fill our cities definitely weren''t built in a day. Skyscrapers are huge construction projects full of complicated steps. From drilling anchor holes and erecting steel beams to laying acres and acres of concrete, it takes lots of people and lots of smarts to build a vertical city. Readers will love putting on their hard hats and seeing the construction for themselves th...