RCC Structures Design
The self-weight of the footing, is

Not considered for calculating the upward pressure on footing
Both (b) and (c)
Also considered for calculating the upward pressure on footing
Not considered for calculating the area of the footing

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RCC Structures Design
For a ribbed slab

All listed here
Overall depth of the slab shall not exceed four times the breadth of the rib
Clear spacing between ribs shall not be greater than 4.5 cm
Width of the rib shall not be less than 7.5 cm

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