Reference
Design standards
The partial factors Slope applies for each built-in standard, where each value comes from, how far it has been validated, and what Slope does not model. In a design, choose one under Analyze → Design factor set; the PDF report runs it too. Copy any standard into your engineering library to make a custom set.
Factor of safety
2 standardsEurocode 7
4 standards- Eurocode 7 — Design Approach 1 (Combinations 1 and 2)EN 1997-1:2004+A1:2013StaticFoS ≥ 1Checked against the standard
- Eurocode 7 — Design Approach 2EN 1997-1:2004+A1:2013StaticFoS ≥ 1Checked against the standard
- Eurocode 7 — Design Approach 3EN 1997-1:2004+A1:2013StaticFoS ≥ 1Checked against the standard
- Eurocode 7 — Earthquake (EN 1998-5:2004)EN 1998-5:2004SeismicFoS ≥ 1Checked against the standard
Eurocode 7 (2024)
2 standardsBS 8006
3 standards- BS 8006:1995 Section 7 — Reinforced SlopesBS 8006:1995StaticFoS ≥ 1Checked against the standard
- BS 8006-1:2010 Section 7 — Reinforced SlopesBS 8006-1:2010+A1:2016StaticFoS ≥ 1Checked against the standard
- BS 8006-2:2011 — Soil nails (Sets 1 and 2)BS 8006-2:2011+A1:2017StaticFoS ≥ 1Checked against the standard
AASHTO
3 standards- AASHTO LRFD 2024 — Strength I, φ 0.75AASHTO LRFD Bridge Design Specifications, 10th ed. (2024)StaticFoS ≥ 1Checked against the standard
- AASHTO LRFD 2024 — Strength I, φ 0.65 (variable or limited data)AASHTO LRFD Bridge Design Specifications, 10th ed. (2024)StaticFoS ≥ 1Checked against the standard
- AASHTO LRFD 2024 — Extreme Event I, φ 0.9AASHTO LRFD Bridge Design Specifications, 10th ed. (2024)SeismicFoS ≥ 1Checked against the standard