Answer by Santosh Kulkarni:
A Sunk slab can be used in the following locations :
- Bath room/toilet/latrine /wash area floor : The floor trap and the drainage lines can be taken within the sunk portion
- Porch slab : here the beams are inverted so that the beams do not protrude down side and a plain surface is available.
- Mid Landing on a staircase : The end beam is designed as an inverted beam so that there is adequate head room available below the landing.
Sunken slab is constructed as roof or floor of toilets or bathroom?
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