For cohesive soils (clay):
Specify Undrained Shear Strength (Su). Friction Angle should be 0 and Coefficient of Friction should remain blank.

For granular soils (e.g. sand):
Specify Coefficient of Friction and Friction Angle (25-45deg). Undrained Shear Strength should remain blank.

If no Coefficient of Friction is specified, the axial load limit will be based, instead, on Su/600psf.

If Su is specified, the transverse load limit will be factored by Su/250psf.

Regarding values for Undrained Shear Strength - I have a paper here that suggests a very soft clay at 10kPa and a stiff clay at 100kPa.