The tab is only available when the foundation supported on lean concrete has been selected on the General tab After pressing the icon, remember to press the Apply button).
There are three choices for Lean concrete / Block foundation.
Lean concrete with no offsets (dimensions identical as in the case of the foundation). Defines only the thickness (height) of lean concrete / block foundation
Lean concrete with equal offsets. Defines the offset dimension and the thickness (height) of lean concrete / lock foundation
Lean concrete with arbitrary offsets. Defines the offset dimensions in each direction and the thickness (height) of lean concrete / block foundation.
If dowel bars are generated between the spread footing and lean concrete / block foundation, the sliding condition is not checked.
If the Block foundation option is selected, the dialog will display the following additional parameters:
At the bottom of the dialog, you determine the optimization parameters when the adopted block foundation parameters do not meet the requirements (in particular, the height H is a dimension that is optimized for the block foundation). An optimization method should be chosen.
Stress in the soil for the block foundation can be evaluated using the stress pressiometric method: allowable, SLS and ULS.