On 2/6/14, 2:43 AM, O Ring wrote:
On Thursday, February 6, 2014 12:04:03 AM UTC-5, Malcom Mal Reynolds wrote:
In article ,

"Robert Green" wrote:



Lots of very interesting stuff about the building of the new One World Trade

Center building. With the tower, the building comes to 1776 feet tall.

It's a remarkable story about how huge projects come together and all the

issues they had to face building super-tall skyscrapers.



The elevators rise at 1800 fpm, making a trip to the top possible in under a

minute. The shape of the building was designed to "spoil" wind vortices.

One thing that surprised me was the copious use of bolts instead of rivets.



Absolutely remarkable video showing how they assembled the spire. If you

didn't get to see it tonight, look for it in reruns. Anyone interested in

how things are built will enjoy it.



--

Bobby G.

You can watch it anytime (for free) on NOVA's website:

http://www.pbs.org/wgbh/nova/tech/gr...upertower.html

Erik