For the following questions answer them individually
If W is the uniformly distributed load on a circular slab of radius R fixed at its ends, the maximum positive radial moment at its center is.
1.$$ \frac{3WR^2}{16} $$
2.$$ \frac{2WR^2}{16} $$
3.$$ \frac{WR^2}{16} $$
According to I.S.: 456, 1978 the thickness of reinforced concrete footing on piles at its edges is kept less than
If the diameter of longitudinal bars of a square column is 16 mm, the diameter of lateral ties should not be less than