Covered outdoor grain piles  — They are usually fenced around the perimeter, with aeration ducts laid in a spoked wheel pattern. Those ducts maintain an even temperature and help keep moisture down inside the grain pile. The grain cover sections, shown above, are ready to be rolled out and fastened together.

Covered outdoor grain piles — They are usually fenced around the perimeter, with aeration ducts laid in a spoked wheel pattern. Those ducts maintain an even temperature and help keep moisture down inside the grain pile. The grain cover sections, shown above, are ready to be rolled out and fastened together.