[bofussing]

A 220 floor building is a hugely complex engineering feat to pull off which will have little in common with the 30 floor hotel that Broad previously manufactured and erected. The difference cannot be overstated; from the structural elements needed to support something approaching 3000 feet (including the sheer loads from wind) to the highly specialised services required (lifts, water, drainage, fire services, power distribution etc.). On top of this there are the technicalities and logistics of manufacturing and assembling something this big and tall in such a short time. There will be a lot of specialist and custom engineering involved.

So what is the point? If Broad's mission is manufacture cost effective, easy to erect and energy efficient tower blocks then the 220/F monster seems an unlikely direction to take. The average tower block in any but the most crowded city is unlikely to much over 30 floors. And from a cost and energy efficiency standpoint there are diminishing returns on very tall buildings anyway.

All in all I think this is more of a publicity stunt than a reality.