Civil Engineering - RCC Structures Design - Discussion

Discussion Forum : RCC Structures Design - Section 2 (Q.No. 34)
To ensure uniform pressure distribution, the thickness of the foundation, is
kept uniform throughout
increased gradually towards the edge
decreased gradually towards the edge
kept zero at the edge.
Answer: Option
No answer description is available. Let's discuss.
7 comments Page 1 of 1.

Jero m said:   1 year ago
The thickness is varied along the length of the footing.

At the centre, the load is more, thus higher thickness is required. However, as the load reduced towards the edge of the footing, the thickness of the footing reduces too.

SARAVANARAJA said:   4 years ago
Agree, Thanks @Aaron.

Aaron said:   4 years ago
Thickness of foundation gradually towards the edge has nothing to do with pressure distribution. The reason for gradually decreasing down the edge is the bending moment is highest at the column face and decreases towards edge. So it makes it more economical to provide the less thickness at the edge. For fact, there is no relation between bending moment and variation of thickness.

Basavaraj said:   6 years ago

You are right Even another important factor is agreed.

Khalid Rashid toor said:   6 years ago
The maximum load acts at centre line of footing or centre of foundation. Intensity of load is reduced towards the outer edge of footing.

Footing is designed according to load distribution, thickness of footing is maximum at centre and Reduced towards edge of footing.

Now the question is that, how pressure distribution is uniform?

Pressure=Load/cross sectional Area.

Greater the load greater is the thickness.
Smaller the load smaller is the thickness.

So pressure will be the same throughout width of footing.

Girish said:   6 years ago
Can anyone explain, why it is decreased towards edge. Why not keeping uniform throughout?

Manish said:   7 years ago
Why it is necessary?

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