From an anonymous source:
E-355 assigned to tower 5
 
E-356  assigned to tower 21
thanks Scott & Danny
New tower ladders for Chicago FD

New tower ladders for Chicago

New tower ladders for Chicago FD

New tower ladders for Chicago

New tower ladders for Chicago FD

New tower ladders for Chicago

New tower ladders for Chicago FD

New tower ladders for Chicago

New tower ladders for Chicago FD

New tower ladders for Chicago