Advantage
1- Flat ceilings are available in this slab because there is no beam in the middle of the cell.
2- The height of the room is more available.
3- Do not obstruct the reflection of light.
4- The beauty of the room increases.
Disadvantage
1- This slab design method is more complex than the one-way slab.
2- Skilled workers are needed.
3- The construction cost is relatively high.