The big blue Stalworth caisson rig drills caissons for Illume Chicago.

Buildings are heavy. Buildings need support. Which explains the presence of the big blue Stalworth machine at 111 South Peoria Street in the West Loop, site of the now-underway Illume Chicago. That’s the beast responsible for drilling caissons into the earth for the future 10-story, 79-condominium project from LG Development and Pappageorge Haymes Partners to rest upon. And rest it will — everyone will — once things quiet down a little bit. Caisson work is loud.