The pieces for my coop door. I found a great piece of wood at Lowe's to use for the door, but it really wasn't wide enough (only 24" wide) so I used a couple of 1x3's and put one on each side of the door to make it wider. The cross bars hold those in place. I got the inspiration for this door from a great YouTube video tutorial by Michael Bronco. I have subscribed to his YouTube channel as he has numerous instructional videos on how to make doors, windows, etc. Here is a link to the video that inspired my door.
http://www.youtube.com/watch?v=mCcBcek8DLU
He also has a video that shows how to make a garden fence. Although not the same, a chicken run could be built based on his video.
http://www.youtube.com/watch?v=svfIpO9EcfM