102 Floors in 410 Days

On May 1, 1931, President Herbert Hoover pressed a button in Washington, D.C., and the Empire State Building lit up in Manhattan. The building had taken just 410 days to construct. Four and a half floors per week. Speed was not a side effect. It was the entire design philosophy.

John Jakob Raskob wanted the tallest building in the world. Architects Shreve, Lamb & Harmon designed a structure that was fundamentally modular: standardized components, repetitive floor plans, every decision optimized for assembly. Construction began March 17, 1930. At peak, over 3,400 workers were on site -- immigrants, along with Mohawk ironworkers renowned for fearlessness at height. Steel arrived pre-cut and numbered. Rivets were tossed red-hot to catchers who secured them before they cooled.

Materials arrived just in time, staged on a strict schedule. Elevators were installed as the building rose, moving supplies vertically within the structure. Construction as choreography. Missing a deadline meant losing money in a collapsing economy.

looking up at the empire state building from the street below. source: wikimedia commons

When the building opened, it was the tallest in the world at 1,250 feet, surpassing the Chrysler Building by over 200 feet. It held that title for nearly four decades until the World Trade Center surpassed it in 1970. In its first years, locals called it the Empty State Building -- office space sat vacant through the Depression. But the structure never failed.

It proved that a city could build upward at industrial speed. Today, the building still stands, structurally unchanged. What was radical in 1931 is now standard practice. Speed, it turned out, could be a design material as fundamental as steel.