Question

Consider the following statements:
1. According to Terzaghi, a foundation is shallow if its depth is equal to or less than its width.
2. Spread footing, strap footing and raft footing are types of shallow foundations.
3. Combined footing may be trapezoidal if the two columns carry unequal loads; and rectangular if both columns carry equal loads.
4. For water tanks, providing raft foundations will avoid unequal settlements.
Which of the above statements are correct?

• A. 1, 2, 3 and 4
• B. 1, 2 and 3 only
• C. 1, 2 and 4 only
• D. 3 and 4 only

Answer 1

The correct option is A 1, 2, 3 and 4

As per Terzaghi, footing is shallow if $\frac{D_f}{B}\le 1$.