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There are no hard and fast rules, and even more so, the norms will not be so detailed.
However, because the bathroom is relatively humid, it is not easy to deal with the exposed tendons in place. Therefore, during the concrete construction of the bathroom floor, it is necessary to adopt the construction measures of a better concrete protective layer to prevent the phenomenon of exposed ribs after the concrete is poured.
It doesn't corrode the water pipes, and the paint doesn't have that energy. It will not affect the water quality. Don't worry about it, don't worry. I hope my answer can help you.
Plate reinforcement is anchored into a beam or reinforced concrete wall. The bottom of the beam must be lower than the bottom of the slab or flat.
Be sure to use a non-slip mat with a good quality.
There is no need for steel bars, and the upper beam of the bathroom is 150-200mm higher than the ground to prevent water backflow in the bathroom
Generally, double-layer two-way configuration reinforcement is used.