The ground behind the garage was sloping.
So I wheel barrowed about 30 loads of sand to make a level run from the sand pit behind my house.
The upright wood is 2x4 spruce that I treated with linseed oil a month before doing the construction
The wood on the ground is pressure treated 2x4s.
The dark green bars are Steel T-Bars hammered into the ground. They are just for extra stability and strength in case of severe winds or black bears. They are tied to the run walls with 16G steel fencing wire.
The walls are 2x2 welded wire.
Buried underneath the sod, on the slope outside of the run, is 1/4 inch welded wire to prevent digging predators from entry. I secured that by hammering many 6 inch sod staples. Many bags of potting soil went over the sand and the 1/4 inch welded wire. Then the sod went over that, secured with just a few sod staples.
With just a bit of watering and fertilizer, the sod grew well and the whole area was secure and hands free in about 3 weeks.
The run and coop holds 10 Buff Orps.