Glasgow Tower (formerly the Millennium Tower) is a 127 meters (417 ft) free-standing landmark observation tower located on the south bank of the River Clyde in Glasgow, Scotland, and forms part of the Glasgow Science Centre complex.
Glasgow Tower is the tallest fully rotating freestanding structure in the world, in which the whole structure is capable of rotating 360 degrees. After being closed in 2008 for refurbishments, the tower re-opened to the general public in July 2014.
The Glasgow Tower also has been the tallest building in both Glasgow and Scotland since its completion in 2001.
The whole structure originally rested upon a Nigerian-made 65-centimeter-diameter (26 in) thrust bearing, but this was replaced with a phosphor-manganese-bronze alloy solid ball and cup bearing prior to re-opening in 2014. This bearing rests at the bottom of a 15-meter-deep (49 ft) caisson, while the tower itself is not directly connected to these foundations, instead of being supported by a ring of 24 rubber-sprung roller bearings at Podium level. This is to allow the building to rotate to face the wind.
The tower has two lifts each with a 12-person capacity, but for reasons of comfort, this is limited to 6 guests plus a single member of staff. The lifts, manufactured by Alimak Hek, ascend the tower in two and a half minutes using a rack and pinion system, providing views to the rear of the tower through all-around glass windows. There is also an emergency staircase, comprising 523 stairs from the Cabin level to the Podium.
According to Wikipedia