Civil Engineering - RCC Structures Design - Discussion

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.

Agree, Thanks @Aaron.

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.

@Khalid.

You are right Even another important factor is agreed.

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.

Can anyone explain, why it is decreased towards edge. Why not keeping uniform throughout?

Why it is necessary?