“The Hidden Life of Skyscrapers and Bridges”
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Title: Built
Author: Roma Agrawal
Category: Technology & Innovation, Economics & Global Markets, Philosophy & Big Ideas
What holds up the world? In this episode, Sam and Sophie dive into Roma Agrawal's 'Built' and discover the invisible forces and materials that shape our cities, from the stone in pyramids to the steel in skyscrapers, and why flexibility is sometimes stronger than rigidity.
They walk through the four building blocks—stone, wood, steel, and concrete—and how each has its own personality in handling compression and tension. They also explore the load path, the elegance of arches and triangles, the hidden world of foundations, and the clever ways engineers design buildings to resist wind and earthquakes, including tuned mass dampers and plastic hinges.
If you've ever looked at a skyscraper and wondered how it stands, this episode is for you. The takeaway: strength isn't about being unyielding—sometimes it's about moving with the forces around you.
Built by Roma Agrawal. If you want the full written summary, the whole library is on 7minutebooks.com/app—over 6,000+ fiction and nonfiction titles, with unlimited access from $2.99 a month, $9.99 a year, or $19.99 lifetime.
Chapters
00:00The Load Path and Invisible Enemies01:05Four Building Blocks: Stone, Wood, Steel, Concrete03:15Shapes: Arches and Triangles03:43Foundations and Resisting Wind and Earthquakes04:55The Human Side of Engineering05:51Takeaway: Strength Through Flexibility
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