topicmaker Veteran


Joined: 28 Feb 2006 Posts: 25847
|
Posted: Fri Aug 14, 2015 1:43 pm Post subject: This 720-Ton Suspended Steel Ball |
|
|
The heavy counterweight hangs between the 92nd and the 87th floor, acting as a tuned mass damper, which keeps the building stable during high winds.
...read more |
|