 The term "butt" describes the hay stacked by the beaverslide and has two meanings.A "butt" can be the amount of hay on a fully loaded rack, but the term also refers to the amount of hay that can be stacked by the beaverslide without moving it, roughly 24 tons of hay.The hay at the top of each haystack is stomped and piled higher towards the middle to allow rain to run off.