I think about the person standing in the lobby a lot.
They’re not thinking about structural dynamics. They’re not thinking about anemometers or damping systems or counterweight specifications. They’re thinking about the meeting they’re going to be late for. They’re watching the elevator indicator and doing the math. And they’re drawing a conclusion about the building they chose to work in.
That conclusion is often wrong. On most windy days, the building above them is performing exactly as its engineers designed it to. The structural systems are doing their job. The dampers are managing motion within comfortable parameters. There is no reason — no structural reason — for them to be standing there.
But the elevator doesn’t know that. It knows what the rooftop anemometer recorded. And so it slows.
Supertall buildings are among the most carefully engineered structures on earth. They are designed, tested, and specified to handle the wind environments they inhabit. What most people don’t know is that the vertical transportation systems in these buildings are not making decisions based on how the building is moving. They’re making decisions based on wind speed recorded at the rooftop. A building handling conditions comfortably and performing exactly as designed can still trigger a wind-induced slowdown because of a number on a weather sensor.
That gap has existed since supertalls emerged as a building category. It wasn’t the result of poor decisions. Direct structural measurement at the scale these operations require simply wasn’t av
The buildings had all this intelligence built into them. And then they handed off to a wind speed reading.