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 off 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 favorable effect is not considered in the analysis.
The surcharge effect on the earth pressures analysis is described in "Influence of surcharge", a theoretical part of the help.