Towering Cranes (Big Jobs, Big Tools!)

"Do you ever wonder how large buildings are built? With the help of cranes! Cranes are machines used to lift heavy things, and they're often found at construction sites. The tallest cranes can lift loads 47 stories up! Readers of this informative book will learn about the parts of cranes and how they work together to get things off the ground. Full-color photographs show cranes at their best-lifting the heaviest loads sky high!"--