The 58-story, 645-foot-tall (197 m) Millennium Tower, which was designed by Handel Architects, is the tallest residential building in San Francisco, but it's unlike any other skyscraper. Since its completion in 2009, the tower has caused a slew of issues for both inhabitants and building owners. In fact, it has been sinking and tilting for some time now, making it the center of engineering and architecture debates and stirring up controversy. In addition to all that its foundations don't extend to bedrock, and it’s fantastically expensive.

The building's tilt is now about 22 inches (55.88 cm) to the west due to the northwest corner sinking about 18 inches (45.72 cm). In this video by the Practical Engineering, you can learn how geology affects the construction and design of skyscraper foundations, and what is being done to repair this structure. If you want to learn more, make sure you watch the video embedded above, and as always, enjoy!

Be the first to read our latest stories, analysis, and trend-spotting on tech from every corner on earth. Sign up for our weekly newsletter today.

Stay on top of the latest engineering news just enter your email and we’ll take care of the rest.

Stay ahead with the latest science, technology and innovation news for free

By subscribing, you agree to ourTerms of Use andPrivacy Policy. You may unsubscribe at any time.

For full access to all features and product updates.

Already have an account? Log in