The main difference between the round and flat bottom grain bins is the construction cost. Flat bottom grain bins are easier and cheaper to construct than the large round grain silos with hopper bottoms. Suppose you will be accessing your grain storage often, or you're holding grain for the short term. In that case, a round grain bin is preferred because it is easier to unload the grains, but if you are storing grains for the long term, the flat bottom grain bins are cheaper. However, you will need a piece of equipment such as an auger transporter or conveyor to unload grains. Read more