Why did people jump from the twin towers if they had a chance of surviving?
My answer will not be popular and many will disagree but here goes. (Beware: long answer because I worked in NYC at the time and have spent a…
What is the largest covered area that can be built without using central columns?
The size is almost unlimited even with current technology. I’ll give you three large if not the largest covered structures. New Century Global Center (NCGC) in Chengdu, China,…