what is the differences between farm building and farm structure?
A structure isn't a building
A windmill and many varieties of silos are farm structures, but they are not farm buildings. The same can be said for a two or three sided structure built to be a windbreak for livestock. There are also feeders for livestock that are not buildings, but are structures...racks to hold bales of feed up off the ground, trough systems that deliver food and water, feed mixers are all examples. Also, some farms dig out areas of hillsides/ridges to put silage in and cover them with plastic or tarps to reduce moisture damage...these would be structures and not buildings. Damming a creek to make a pond to water stock would be a farm structure and is clearly not a building. The differences are in the use, complexity of design and materials.
