The "Surcharge" frame contains a table with a list of input surcharges. Adding surcharge is performed in the "New surcharge" dialog window. The input surcharges can be edited on the desktop using active dimensions or active objects.
The z-coordinate measured from the top point of a structure is specified (positive direction downwards) when inputting the surcharge at a certain depth. In case the surcharge is found out of the terrain, the program prompts an error message before calculation.
A surcharge can be specified as permanent, variable, or accidental. The resulting load action is multiplied by the corresponding design coefficient according to the type of surcharge. An accidental surcharge with a favorable effect is not considered in the analysis.
The surcharge effect on the earth pressures analysis is described in the "Influence of surcharge", a theoretical part of the help.