Table 3 Slope stability classes
Safety factor (F) | Slope stability class | Remarks |
|---|---|---|
F > 1.5 | Stable | Only major destabilising factors lead to instability |
1.25 < F < 1.5 | Moderately stable | Moderate destabilising factors lead to instability |
1 < F < 1.25 | Quasi stable | Minor destabilising factors can lead to instability |
F < 1 | Unstable | Stabilising factors are needed for stability |