Engineering Challenges: Building Skyscrapers

Engineering Challenges: Building Skyscrapers — page 3
Builders have been reaching for the sky for ages Pyramids in ancient Egypt were made of heavy stone In the Middle Ages builders used stone to construct churches and towers These buildings had few windows so they were cold and dark And the structures couldn’t be built too high The weight of the stone would cause them to collapse Things started to change during the 1700S and 1800s This period was known as the Industrial Revolution It was a time when many new machines were being invented Millions of people were moving away from the country to work in cities 6