three-ended barn

straw shed

An extension at the rear of a barn, usually on one side, used primarily for the storage of straw; it may also be a two-story structure in which the upper story is used to store hay and the lower story is used to store farm machinery.
References in periodicals archive ?
Sometimes another barn was added at a 90-degree angle, creating what's called a three-ended barn. A gambrel roof has a dual pitch and is popular, because it offers more loft storage.