Shallow Foundations MCQ with answer and solution

Concept

Raft foundation

Step-by-step solution

1. A raft (mat) foundation is a single slab covering the entire building area. 2. It distributes the load of the whole building over a large area and reduces bearing pressure.

Explanation

Raft foundations are used on soils with low bearing capacity or where isolated footings would cover more than half the building area. They also reduce differential settlement.

Shortcut

Raft = one big slab under the whole building.

Common mistake

Choosing shallow foundation, which is a category.