Can we use RCC Slab/Roof as a floor directly for the next level

[RajKumar89]

In the picture That hole is for the lift so ignore it, and my question is that can we cast RCC slab and directly use after finishing it with power trowel.
Can anybody help me understanding this
in attached picture the RCC slab is directly used as a floor for the next floor. If i'm not wrong no additional grading and just power trowel finishing is done and it is ready to use.

 

[Ron]

The roof slab will have to be analyzed to see if it can structurally withstand the loads for a floor and potentially additional loads from the structure above if it can't be passed directly through columns. The code mandated loads on a roof slab are different than for a floor slab, typically the roof slab would be under-designed for a floor.