If two individual footings are too close as per design, then they should be converted as-
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A.
Mat raft
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B.
Strap footing
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C.
Strip raft
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D.
Combined footing
Correct Answer:
D. Combined footing
Explanation:
When two individual footings are positioned too close to each other, their pressure bulbs—the zones of soil stress beneath them—can overlap. This interaction increases the pressure on the soil and can lead to excessive or uneven settlement, potentially compromising the building's structural integrity.
To resolve this, the separate footings are typically integrated into a single, larger unit known as a combined footing. This foundation type is specifically designed to support two or more columns, ensuring that loads are distributed more uniformly over a continuous area and providing better stability when space is limited or column spacing is tight.
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