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The tower crane at K2 jumps 100 feet

In a deceptively simple operation a “jacking crane” frames part of a tower crane and lifts the crane’s cab and jibs twenty feet, opening a hole for the addition of another 20-foot section to the crane. What’s simple to describe is, of course, the result of technological wizardry and precision skills.

Marie Spear, one of the crane operators at K2, a 34-story apartment tower under construction in Chicago’s Fulton River District, describes what’s commonly referred to as a “jump” in this video. Five sections were added to the crane today, resulting in a 100-foot jump.

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