Civil Engineering - Building Construction - Discussion

5. 

Raft foundation are generally preferred to when the area required for individual footing, is more than

[A]. 25% to total area
[B]. 30% of total area
[C]. 40% to total area
[D]. 50% of total area.

Answer: Option D

Explanation:

No answer description available for this question.

Sumit said: (Oct 26, 2017)  
I think the right answer is (c).

Selva said: (Dec 19, 2017)  
Rafts are most often used these days when the strata is unstable or (because of this) a normal strip foundation would cover more than 50% of the ground area beneath the building.

So answer D is correct.

Sibbu said: (Mar 7, 2018)  
I agree with the given answer.

Suresh said: (Aug 21, 2021)  
So the raft foundation is provided when the required footing is half than the total area so half is 50 percent.

Therefore the given answer is right.

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