Q1797Fazlur Rahman Khan transformed high-rise engineering with tube structural systems, making towers such as Chicago's John Hancock Centre and Willis Tower more efficient against wind and gravity.
Khan's genius was to see that a tall building could behave less like a stack and more like a tube. By moving structural strength towards the perimeter, his systems resisted wind with less waste and opened new possibilities for height, form and economy. The skyline changed because an engineer thought structurally and humanly at once: buildings had to stand, but they also had to make room for life high in the air.






