This year we built four pastured poultry pens from a design I found from Faye Farms in Kansas. This system was popularized by Joel Salatin at Polyface Farms but I found that using PVC made a stronger, lighter, and more durable structure. The dimensions of the pend are 10′ X 10′ X 2′ with 1 1/2″ PVC. We considered making the height three feet instead of 2, but it would have made climbing in impossible for shorter people.
The key to making this pen is using three types of specialized PVC joints that are typically not sold in stores. For the corners you need side outlet three way elbows, the midpoints four way side outlet tees, and to create the door slip T fittings.
After I cemented the PVC joints together, I screwed corrugated steel roofing to half of the top and 1 1/2 sides. This gives the chickens a wind break on two sides. I put chicken wire with 1 inch openings on the rest of the sides and top with zip ties while still being able to open the top door. The bottom stays open.
We use Plasson broiler drinkers and circular feeders filled with certified organic grain. We move the pens every morning and next year I plan on moving them in the evening as well.