Civil Engineering - RCC Structures Design - Discussion

If shear stress exceeds 5kg/cm2 then use 12 mm and when it is less than 5 then use 8mm stirrup.

In case of combined footing under axial loading we can use 12 legged stirrups.

If the shear stresses not more than 5 kg/cm^2 = 8 legged stirrups.
Shear stress more than 5kg/cm^2 = 12 legged.

Is it recommended by IS code?

Explain the answer.

If it >5 than 12.

If <5 than 8 stirrup.

Right, thanks @VK Singh.

If it >5 then 12.

If <5 then 8 stirrups.

The Maximum shear stress depends type of the mix used. In no way any of the max allowed shear stress are more than 4N/Sqmm. Hence The following conclusions are offered.

1. Evaluate the Shear safety criteria based on type of the mix used.

2. If the shear stress at the critical cross section of the footing is more than maximum limit specified it is advised to.

A) Increase the depth of the footing.

B) Provide a string beam to take care of the shear forces without increase of the depth of the footing.

C) If the six or 8 legged stirrups are provided to counter the shear force then the sole criteria of design should be shear stress due to residual shear =total shear force- shear capacity of the section.

If the shear stresses not more than 5 kg/cm^2 = 8 legged stirrups.

And If Shear stress more than 5kg/cm^2 = 12 legged stirrups.