The design of portable bulkheads has changed from earlier recommendations. Revised plans are included in NDSU publication AE-84, Temporary Grain Storage. If the grain does not drop long distances from the unloading auger to the pile, corn will naturally seek an angle of repose of about 21 to 23 degrees. Buildings used for grain storage should be in a well-drained site. Lay a sheet of 6-mil or heavier plastic on the floor to reduce the migration of moisture from the soil or through cracks in concrete floors into the grain.
Cool temperatures minimize mold growth, limit moisture migration and control insects.
If grain must be piled outside on the ground,drainage is crucial. The pile should be on high ground and the earth crowned under the pile. Placing plastic on the ground absolutely is essential to keep soil moisture from migrating into the grain. Cooling the grain prior to piling improve the chances for success. Cover piles with plastic or a tarp to reduce wetting by rain and snow, and to minimize damage by wind and birds.