08-21-2010, 12:53 PM
Hi farooq ,
Usually thickness of footings is governed by their punching shears. Safe has an option to show you the punching shear ratios. Here you can check the desired ratio. Usually a footing fails in punching if its punching shear ratio is below 1. In that case you've to increase its thickness to increase the ratio above 1. In safe, after running analysis and design of your model, go to Design menu, point to Dispaly Punching Shear Ratios. Now you can consider footings having punching shear ratios below 1 as safe against thickess while those having value greater than 1 should be increased in thickness.
Hope this might help you to some extent.
Regards.
Usually thickness of footings is governed by their punching shears. Safe has an option to show you the punching shear ratios. Here you can check the desired ratio. Usually a footing fails in punching if its punching shear ratio is below 1. In that case you've to increase its thickness to increase the ratio above 1. In safe, after running analysis and design of your model, go to Design menu, point to Dispaly Punching Shear Ratios. Now you can consider footings having punching shear ratios below 1 as safe against thickess while those having value greater than 1 should be increased in thickness.
Hope this might help you to some extent.
Regards.