This excerpt is from Small Farmers Journal volume twenty-eight number three, and discusses building permanent corn cribs.
Storing ear corn in a crib is the most practical way to hold corn on many farms. The crib should be placed away from other buildings or trees to allow free circulation of air through and around it. Placing the crib with the long walls exposed to the prevailing wind helps the circulation of air through the corn. The walls must be open to allow the air to circulate freely. Wood slats with openings between them, welded-wire mesh or coarse hardware cloth, or snow fence, if well supported, all make satisfactory crib walls. The floors can be either tight or open, but a wood floor must be far enough from the ground to prevent corn from drawing dampness and to prevent rats and other rodents from finding harbor under the crib. Concrete floors are satisfactory, and it is recommended that they be built with concrete foundations. A concrete floor needs a gravel fill at least six inches thick, and a moisture barrier of roll roofing or some similar material under the slab to prevent ground moisture from getting to the surface of the floor.