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How Cranes Lift Themselves 40 Stories
Tower cranes cost $1,500 to $5,000 a day to rent, and over 235 of them currently dot Toronto's skyline alone — each one a bet on a construction boom worth $40 billion. But how do these machines actually work? This episode traces crane technology from Mesopotamian shadufs to Roman treadwheel cranes to Hans Liebherr's 1949 breakthrough, then dives into the counterintuitive physics of counterweights, load charts, and the climbing frames that let cranes lift themselves floor by floor. Plus: why wind can bring a crane down, and the safety margins that separate routine operation from disaster…
The skinny
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