RCC Structures Design
To have pressure wholly compressive under the base of a retaining wall of width b, the resultant of the weight of the wall and the pressure exerted by the retained, earth should have eccentricity not more than

b/5
b/6
b/3
b/4

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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
Overall depth of the slab shall not exceed four times the breadth of the rib
Width of the rib shall not be less than 7.5 cm

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

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

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