Wang is a tightrope walker: One lapse in concentration and everything can be lost.
“They are a lot like tightrope walkers holding a pole in their hands, ” explains Bill Spencer, a civil engineer at the University of Illinois at Urbana-Champaign.
First, as the structure begins to sway, the heavy-tiled roof covering the extended eaves of each storey ACTS like the long pole with weights on the ends that a tightrope walker USES to steady himself.