The gross bearing capacity of a strip footing 1.5 m wide located at a depth of 1.2 m in clay is 420 kN/m². If the unit weight of the soil is 20 kN/m³, estimate the net bearing capacity in kN/m² units.

Correct option is B

Given,
Gross bearing capacity (qg ) = 420 kN/m²
Unit weight of soil = 20 kN/m³
Depth of footing = 1.2 m
So,
Net bearing capacity
���� = ���� − ������= 420 – 20 × 1.2
= 396 kN/m²