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The same as above, it is recommended that you make a beam floor slab, the plate reinforcement can be a little smaller, 10 is about the same, and the beam does not need to be too big 250*500 to do organic almost. The specific needs to be calculated to come out.
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The span is a bit large, and it is recommended to do a beam and slab floor.
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With 12 and 10's.
Thickness 120
There are calculation rules, the closed ones are counted as the full area, and the unclosed ones are calculated as the half area.
Personally, I don't think it can be, the same type of room on the same side of the same unit, your kitchen is just above your upstairs kitchen, and there will be waste water and there is a sewer pipe in that part and it is connected to the bathroom, do you think you can put it? >>>More