- This tool is for slope staility analysis where the translational sliding surface is parallel to the slope surface, as shown in the figure above.
- The slip surface and water table are assumed as parallel to the slope surface.
- If water is not considered, h
_{w}= z. If soil layer is saturated, h_{w}= 0. - For cohesionless slope, the cohesive strength c should be 0.
- The minimum safety factor for slope is obtained in the calculation.
- All the input parameters should be positive.
- The unit weight of water is 9.8 kN/m
^{3}. - For "nan", "0" or "inf" displayed in Results, please check your input parameters.

**Safety Factor**

F_{s}=