This from Josh Boyajian:

Companies had a fire Thursday afternoon in the 5800 block of Michigan. Engine 84 arrived and had fire showing from the 3rd floor. They deck gunned it and lead out a line. Truck 51 and 30 had their mains to the roof. I arrived well after the fire was knocked. Here are some shots. 

Chicago FD Spartan fire engine

Josh Boyajian photo

fireman at fire scene

Josh Boyajian photo

Chicago Spartan ERV aerial

Josh Boyajian photo

E-ONE aerial ladder truck

Josh Boyajian photo