Structural Engineering

People build skyscrapers primarily because they are convenient -- you can create a lot of real estate out of a relatively small ground area. They're also awe-inspiring. Skyscrapers capture our imagination -- how high can we build them? Learn about the architecture and design of these monumental buildings.

By Tom Harris

They don't have engines, brakes or accelerators. No, these amazing machines rely on physical, centripetal and gravitational forces to urge thrills, screams and that sinking stomach feeling we all love (and hate). Read more about the science of fun.

By Tom Harris & Cherise Threewitt

A tunnel can be simply defined as a tube hollowed through soil or stone, but actually constructing a tunnel is a challenge. Find out how tunnels are built.

By William Harris

Whether we're trying to save a sinking city or dig a massive tunnel, our appetite for construction knows no bounds. But if designers had known the actual cost of these 10 projects, they might have gone back to the drawing board.

By Jacob Silverman & Patrick J. Kiger

Uncover the impact of the Bessemer process, which revolutionized steel production and shaped modern society.

By Desiree Bowie

It's easy to confuse the Parthenon and the Pantheon. The names are so similar, and they're both ancient ruins. But despite those similarities, the two structures are very different.

By Carrie Dennis

Despite what the nursery rhyme says, London Bridge is not falling down - and never really has. But the bridge that spans the Thames has been rebuilt again and again for two millennia.

By Carrie Whitney, Ph.D.

This dragon is illuminated every night, spitting out both fire and water on weekends and holidays, as it sways its way over the Han River in Da Nang.

By Jesslyn Shields

SCIFs are spy-proof, highly secure facilities designed for viewing and working with sensitive national security secrets. We talk to a former general counsel for the NSA to find out how they work.

By Patrick J. Kiger

Crinkle crankle walls undulate, mimicking the shape of a snake's slither. But what's the purpose of these wavy walls?

By Jennifer Walker-Journey

In the last few decades, there's been a sort of arms race to build ever-taller skyscrapers. Which seven currently rank as the world's tallest buildings?

By Alia Hoyt

Sometimes it seems as though Earth has been hitting the caffeine a little too hard, with all the shakes from earthquakes. So, how do structures stand strong amid all those quakes?

By William Harris

The Bay Bridge is a wonder of structural engineering. Find out how multiple architectural styles were incorporated into the bridge that unites Oakland with San Francisco.

By Wesley Fenlon

A soft-story building has a first floor that's more flexible than the ones above -- think apartments over a department store that's mostly open space. How does soft-story retrofitting keep such buildings from collapsing in a quake?

By Jonathan Atteberry

Steel is getting more expensive because the prices of iron and coal are rising. Are there alternatives to steel that can do the same job -- or better -- for less?

By Becky Striepe

If you think regular old domes took the world of structural engineering by storm, you should meet their geodesic cousins. What is a geodesic dome, and who first came up with the idea of building triangle-covered spheres as practical structures?

By Nathan Chandler

Bridges span the gap and help us get from point A to B, but who knew they could float, too? Find out what the deal is with floating bridges in this article.

By Nathan Chandler

Jenga seems like such a simple game -- all you have to do is keep a tower of wooden blocks from toppling over. It may be simple, but it's anchored by several complex structural engineering concepts.

By Dave Roos

Playing with Lego blocks isn't just child's play. In fact, these blocks and products present a hands-on opportunity to learn the basics of structural engineering.

By Marianne Spoon

You may see most bridges as those things you cross on your way to somewhere else, but where would you be if one collapsed? We've figured out 10 reasons why the worst happens.

By Ed Grabianowski

The World Trade Center employed several new approaches to skyscraper construction. From slurry walls to sky lobbies to "tube within a tube" design features, what made this project distinctive from an architectural engineering standpoint?

By Michael Franco

The materials used to build the World Trade Center's twin towers have been heavily scrutinized since the 9/11 terrorist attacks -- including the steel that formed the frames of the skyscrapers.

By Michael Franco

It's been compared Jerusalem's Wailing Wall. What purpose did the slurry wall serve the World Trade Center, and what is its significance now?

By Patrick J. Kiger

Man has been building islands all over the world for centuries using extraordinary feats of engineering. But at what cost to the environment?

By Mark Mancini

In 17th century Japan, wealthy citizens built homes with "nightingale floors" that squeaked, warning them of intruders. In fact, the floors squeaked louder when the steps got lighter.

By Nathan Chandler