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eng.retaining-wall-sliding-check Calculator
Calculates the sliding resistance from soil friction and passive pressure, and factor of safety against sliding for a retaining wall. Factor of safety against sliding ≥1.5 is typically required — a shear key extending below the footing adds passive resistance.
Inputs
Vertical Load Kn M
Applied force or weight (N or kN). Divide into dead load (permanent) and live load (variable — people, wind, etc.).
Horizontal Force Kn M
Push or pull (N). F = ma. Net force determines acceleration. Account for all forces including gravity and friction.
Base Friction Coeff
Reference formula or conversion factor shown for context.
Passive Resistance Kn M
Opposition to current flow (Ω). V = IR. Resistors in series add; in parallel their reciprocals add.
Results
factor of safety against sliding
Strength / applied load. A safety factor of 2.0 means the structure can handle twice the design load before failure. Buildings: 1.5–3. Lifting equipment: 4–6.
resisting force (kN/m)
Sample size or count used in the calculation.
driving force (kN/m)
Sample size or count used in the calculation.
friction component (kN/m)
Sample size or count used in the calculation.
minimum FOS
The smallest value in the dataset or feasible range.
check
A pass/fail verification against the applicable code, standard, or threshold.