During my visit to the Big Apple in August 18 I decided to learn more about the 9/11 history and technology behind the twin towers. The 11 September 2001 will always be a day that will never be forgotten. Even to this day I know exactly where I was and how I found out about the attack. Although 17 years have passed it was still very emotional walking through the corridors of the museum, which was dedicated not only to honour the victims but also give an insight of all technology, architecture and aftermath of 911.
As I am in the lift trade myself, I was intrigued to discover the technology of the World Trade elevators. According to the information given in the museum there were a total of 198 elevators in the Twin Towers and 15 miles of elevator shafts. Each tower had 110 floors.
They were the first skyscrapers to employ a system of local and express elevators. The High-speed express elevators, which held up to 55 adults at a time, travelled at a rate of 27 feet per second.
The elevator motor which can be seen on the photo above was one of the largest motors in the world when installed at the time.
Source of information: Memorial Museum, 180 Greenwich St, New York, NY 10007, USA