110 N Carpenter
- Location Illinois
Michels built 458 secant piles and 100 caissons in 90 days for a 10-story, 600,000-square-foot building on the site of the new McDonald's corporate headquarters. Each secant pile was 34 inches in diameter; and drilled to a depth between 40 and 100 feet. The caissons and secant piles make up an exposed basement wall for a two-story underground parking structure. Tremie pouring was used in all shafts 60 feet or deeper. Michels also drove sheet piling in the middle of the site for an elevator shaft and utility room.