Place pallets or other wood structures on the floor of the basement or the garage. The object is to create an air space between the bags of corn and the cement floor. This limits absorption of moisture by the corn.
Stack the corn on the pallets. Forty bags of corn make up 1 ton of corn. Depending on usage, the corn may be delivered in 1- or 2-ton increments. Eighty bags, 2 tons, takes up an area 6 feet high and wide if the bags are stacked like cordwood with the ends of the bags out.
Monitor the area for birds and rodents. Corn is an attractive feed for these animals, and most are capable of chewing through bags.