A Linkedin post late last week from Thomas Roszak tells us concrete at 160 North Elizabeth has reached the 15th floor. This is a 27-story tower, so that’s more than halfway up. Because math. And I’m good at it. Clark and Adjustable are good at things too, because this building is flying upwards.

If you happened to make it outside Thursday, you noticed it was a sunny, gorgeous day. And sunny days are ideal for construction progress photos. So I took a few:

Enjoying the photos? Metra and CTA rides (and Amtrak trains to Milwaukee), Zipcars, Divvy Bikes, camera lenses, domain fees, snacks & energy drinks, and comfortable walking shoes add up. You can help offset expenses by making a greatly-appreciated donation to Building Up Chicago.