Surprising Facts about the world's tallest buildings !!!

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Transcript

00:00Welcome back to Fact Space. Humans have always been obsessed with reaching the sky.

00:05But building these giants requires more than just steel and glass. It requires defying the

00:11laws of physics. Here are some surprising facts about the world's tallest buildings.

00:161. The Burj Khalifa's Weight and the Sand Paradox. The Burj Khalifa in Dubai is the current king of

00:23the sky, standing at 828 meters. But here's the irony. Even though it's surrounded by a desert,

00:29it wasn't built with local sand. Desert sand is too smooth and round for concrete.

00:35To build this giant, they had to import massive amounts of specialized sand all the way from

00:40Australia. 2. They are designed to sway. If a skyscraper was perfectly rigid, it would snap

00:47in high winds. The Burj Khalifa is designed to sway about 1.5 meters, nearly 5 feet, at the very top.

00:54To prevent people inside from getting motion sickness, many skyscrapers use a tuned mass damper,

01:00a massive, multi-hundred-ton steel ball suspended near the top that acts as a counterweight to

01:05stabilize the building during storms or earthquakes. 3. The High-altitude Plumbing Problem. In buildings

01:12like the Shanghai Tower, gravity is a major enemy. If you simply dropped sewage down a pipe from the

01:18120th floor, the speed and pressure would destroy the pipes at the bottom. Instead, engineers use a

01:24series of S-bends and holding tanks to slow the waste down. Also, the Burj Khalifa produces enough

01:30condensation from its AC units to fill 20 Olympic-sized swimming pools every year.

01:364. Double Sunsets. The Burj Khalifa is so tall that you can watch the sunset at the ground level,

01:42take the high-speed elevator to the top, and watch the same sunset again. Because of this,

01:47Muslims living on the higher floors have to wait two to three minutes longer to break their fast

01:52during Ramadan than those on the ground. 5. The Hotel of Doom. Not every giant is a success.

02:00The Ryujeong Hotel in North Korea is over 300 meters tall and has dominated the skyline of Pyongyang

02:05since 1987. However, it has never hosted a single guest. It's the tallest unoccupied building in the

02:13world, earning it the nickname, the Hotel of Doom. From Australian sand to double sunsets,

02:18life at the top is a different world entirely. Subscribe and tell me your favorite part in the video.

02:25See you on the next video.