Example Problems

Example Problem 1: Calculate the required plan dimensions for a square isolated footing.

Example Problem 2: A rigid square footing ($2 \, m \times 2 \, m$) is subjected to a vertical column load of $800 \, kN$ and a moment of $120 \, kN \cdot m$ about one axis. Determine the eccentricity of the load and calculate the maximum and minimum bearing pressures under the footing.

Example Problem 3: Two adjacent square column footings are spaced $1.0 \, m$ apart edge-to-edge. Footing A ($1.5 \, m \times 1.5 \, m$) carries $500 \, kN$, and Footing B ($2.0 \, m \times 2.0 \, m$) carries $900 \, kN$. To avoid overlapping stress zones, they are replaced with a single combined rectangular footing. Determine the required dimensions so that the resulting soil pressure is uniform. Assume the safe bearing capacity is $150 \, kPa$.