Eli5: how can a building be on rollers when everywhere I look it’s connected to the ground?

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We had a medium earthquake a few weeks
Ago but it felt pretty strong. I was at work and someone sent out an email that said “the earthquake felt stronger here because the building is on rollers” but everywhere I look the building is connected to the ground and there is a center courtyard inside our triangle shaped building that looks like a mound of earth. How can my building be on rollers?

In: Engineering

6 Answers

Anonymous 0 Comments

Fun fact: Halley research station in Antarctica is on actual rollers, because it’s built on a glacier and they need to move it inland every few years. So they made a building that can move, instead of constantly having to rebuild.

This is not connected to earthquakes just interesting.

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