Now that's big: caisson sleeves on site

Take a look at these enormous caisson sleeves on the ground at the construction site. They will be dropped in the holes created by the (blue) caisson driller and filled to make the supports for the cantilevered Jackman Law Building. For context, you can see several members of the construction crew close to the caisson driller, just to its left--and just how small they appear in comparison to the sleeves.