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

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

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

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