your rungs are very far apart on that ladder, have you had any chickens fall through and get stuck? lolI've been following the recent posts to this thread and thought I'll put in my two cents here. My poop tray is 5' wide by 28" in depth. As you can see from the pic below when I built my roost bar/poop tray I used true 2 x 4's and sandwiched in between a 1/2" piece of plywood. This gave me a true depth of 4" in the "tray". What I did was I dumped a bag of play sand in the bottom of the tray first, and then dumped a full bag of Sweet PDZ granular on top. Cleanup is easy-peasy with a kitty litter scoop...3-4 minutes..DONE! And my coop smells fresh as a daisy. Hope this helps those of you still quandering what/how to do this.