Each section has a varying number of rows and seats per row. If you already have tickets, find your seats for row and seat numbers.
For concerts with a GA Field, Field T and U seating will be on the Field itself (where the Cubs would play during a baseball game) in front of the stage and behind the general admission field. Field T will be directly behind the GA Field on the far left side when looking at the stage. Field U will be on the far right side of the stage located behind the GA Field and Field L.
No, all 100 level sections at Wrigley Field are uncovered. With rain in the forecast all fans sitting in these seats should be prepared!
All floor seats, and low-number sections (1-37 and 100s) will not be covered and should be completely avoided. As those are the closest seats to the stage, you'll want to focus your search on the 200 level sections that are under the roof and offer a good angle towards the stage.
In most 200 level sections, all rows are under cover but you'll also battle the support beams for an unobstructed view. Choose a low-number 200 level section for the best overall experience. Please see the ticket suggestions below and my comments.