<P> By July 27 , half of the steel skeleton had been completed . The steel structure was completed on September 19 , twelve days ahead of schedule and 23 weeks after the start of construction . The Empire State Building surpassed the heights of both the Chrysler Building and 40 Wall Street on April 11 , 1931 , twelve days ahead of schedule and 410 days after construction commenced . </P>
<P> By July 27 , half of the steel skeleton had been completed . The steel structure was completed on September 19 , twelve days ahead of schedule and 23 weeks after the start of construction . The Empire State Building surpassed the heights of both the Chrysler Building and 40 Wall Street on April 11 , 1931 , twelve days ahead of schedule and 410 days after construction commenced . </P>
how long did it take workers to build the empire state building
how long did it take workers to build the empire state building
410 days
410 days