Krusty my trusty Kubata BX1800 FEL is rated to lift just under 500 pounds. Problem is I don't know how much that would be in volume. I have lifted and hauled the bucket stuffed with field stone to overflowing and wonder if I am exceeding the safe capacity. Can anyone tell me how much sand weighs 500 pounds? In other words how many cubic feet of sand weighs 500 pounds. That will give me an idea what is too much. Thanks