Holding 10 lb. pieces of lead. Note many more stacked on the bridge deck. I had a bunch of frame bays to fill with 12,000 lbs of lead, and finally decided I really didn't want to hassle with pouring it. So I sandblasted (again) each bay, then painted a concrete wash on them and let that go off. I then haunted the local junkies in Boston and found enough of the right size pigs to fit them in like a jig saw puzzle, vibrating a real soupy concrete mix in with each 2nd layer. Next