Which among the following is an incorrect statement regarding reinforced concrete footing?
1
Minimum percentage of reinforcement for footing is 0.12% of gross sectional area with mild bars.
2
Minimum cover for footing is 50 mm.
3
Minimum depth of foundation should be 500 mm.
4
Permissible shear stress for footing is given by τc = 0.25√fck according to limit state method.