Last week we poured some concrete for the foley stage concrete surface. The pits in our breakaway floors are 4 feet long, thirty inches wide, and 8 inches deep.
After several days of curing the concrete has turned out very nice. I was a total of 5 full bags to fill the pit, and the resulting slab has zero ringing to it and a very nice surface texture.
apologies in advance for the blurry photos.