Specifies the internal friction angle of the soil. Typical values are:
-
Clay - 0
-
Silt - 26-25
-
Sand - 27-45
-
For the American Lifelines Alliance soil model, this entry must be between 20- and 45-degrees.
-
For the CAESAR II basic soil model, this entry is used in the soil restraint equations to generate restraint ultimate loads and stiffnesses.