Pad Foundation Design 1

[bazza1950]

Hi Guys

I have a 100x100mm SHS colum with a downward force of 185.95kn the ground is solid rock at about 1100mm deep
what size pad foundation would i need

 

[slickdeals]

Since you are bearing on rock, your footing thickness will be driven by the punching shear capacity (based on the size of your base plate).

This is a simple calc and you shouldn't need help from this forum to figure it out.

 

[bazza1950]

Thanks

I have worked out the Bearing pressure but i am not sure of the bearing capacity of the rock

 

[slickdeals]

According to presumptive bearing values in IBC Chapter 18 (Table 1806.2), the values can range from 4000 psf (sedimentary, weathered rock) to 12000 psf (crystalline bedrock). Don't you have a Geotech on board that can provide you these values?