Question

A footing of $3m\times 3m$ size transmits a load of 1800 kN. The angle of load dispersion in soil $\alpha ={\tan }^{-1}0.5$. What is the stress created by the footing load at a depth of 5m?

• A. $26.12kN/m^2$
• B. $27.12kN/m^2$
• C. $28.12kN/m^2$
• D. $29.12kN/m^2$

Answer 1

The correct option is C $28.12kN/m^2$


PQ= B+z= 3+5= 8m
$\text{Stress at z = 5m is}\sigma =\frac{1800}{8\times 8}$
$=28.125kN/m^2$