Specifies the coefficient of earth pressure. This option displays only if you select American Lifeline Alliance in the Soil Model Type list and Sand/Gravel as the Soil Classification.
Typical values are on the order of 1.0. If left blank, K0 defaults to the following:
K0 - 1.0 - sin(internal friction angle of the soil)
The internal friction angle of the soil is defined by FRICT. ANGLE (Sand=27-45; Silt=26-35; Clay=0) (deg.).