FYI - There is a slight design flaw in these plans. Unfortunately I didnt catch it until I had nailed everything up tight. The roof framing calls for the second board in from the sides to have a inside measurement of 49". Well if I had paid close enough attention I would have known that if the outside measurement of the floor is 48" then that measurement would need to transfer up to the roof section. oops! I just cut the sheeting 48x48 and split the difference at the top. Nothing paint wont cover.
I also plan to use this design for our coop. From what you said it looks to be somewhat correct. That extra board fits outside the 48" wide wall dimension, as looking at the front view. Taking a normal 2x4 which is 1.5x3.5 shows it on its side. So in actuality is really only 1/4" off since you would split the dimension of 1.5" which is 3/4 inch on each side. The plan only allows for 1" or 1/2" on each side.
The flaw might be in the drawing in that the front view shows the plywood to be cut 48" wide and fit inside the side pieces, which would make it 1" wider, or 49"??
I guess they just leave some wiggle room. 
Chicken math is true. We just received another 6 chicks on 4/1/13. 3 Cuckoo Marans and 3 Buff Orpingtons.
Chicken math is true. We just received another 6 chicks on 4/1/13. 3 Cuckoo Marans and 3 Buff Orpingtons.
However, I had no desire to take it apart (never go backwards! 
) so I got another sheet of 3/4" plywood and used a 1" strip on the floor; the rest I needed for the nest boxes anyway so it all worked out in the end. 
) - 8x12 based on this design but with modifications. It's almost complete - not a moment too soon, since I have 17 juveniles that are in need of leaving the brooder!
