This part of the window introduces basic parameters of soils - unit weight, angle of internal friction and cohesion. The particular values are obtained from a geotechnical survey or laboratory experiments. If these data are not available, it is possible to exploit built-in database of soils, which contains the values of selected soil characteristics. The characteristics of rocks are not listed in the database built, these parameters must be defined manually.
The associated theory is described in detail in chapter "Earth pressures".
Dialog window "Add new soils" - "Basic data"