Retaining Wall Stability, Overturning, Sliding Factor of Safety & Eccentricity Calculator
Check geotechnical stability of gravity and cantilever retaining walls: Overturning Factor of Safety (FS_overturning ≥ 1.50 - 2.0), Base Sliding Factor of Safety (FS_sliding ≥ 1.50), and base pressure eccentricity (Middle-Third Rule e ≤ B/6) under Eurocode 7 and ACI 318 standards.
Factor of Safety Against Overturning (FS_overturning)
Calculator Inputs
Factor of Safety Against Overturning (FS_overturning)
Factor of Safety Against Sliding (FS_sliding)
Base Resultant Eccentricity (e in m)
Middle Third Kern Limit (B / 6 in m)
Resisting Base Friction Force
Resultant Location from Base Toe
Overturning vs. Sliding Factor of Safety Breakdown
If the sliding safety factor is below 1.50, a concrete shear key beneath the footing base or a wider base slab must be engineered.
All engineering calculations, structural estimates, and electrical sizing metrics are provided for preliminary estimation only. Always ensure compliance with relevant statutory building codes and occupational safety standards, verified by a certified professional engineer before practical implementation.
Calculation Methodology
FS_Overturning = Resisting Moment (Mr) / Overturning Moment (Mo). FS_Sliding = (Base Friction μ * Total Vertical Weight W) / Lateral Active Thrust (Pa). Base Eccentricity e = (B / 2) - ((Mr - Mo) / W).
Frequently Asked Questions
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