Retaining Wall Soil Load Estimator

Soil type can be determined through visual examination or laboratory testing. Loose sand feels gritty and won’t hold shape when moist. Clay feels smooth and sticky when wet. For critical projects, consult a geotechnical engineer for proper soil classification.

The safety factor accounts for uncertainties in soil properties, construction quality, and unexpected loads. A factor of 1.5-2.0 is typical for retaining walls. Higher factors (up to 2.5) may be used for critical structures or poor soil conditions.

This calculator provides estimates based on standard Rankine earth pressure theory. For walls over 4 feet tall, complex loading conditions, or critical applications, consult a structural engineer. Actual field conditions may vary due to water pressure, soil variability, and construction methods.

No, this calculator assumes well-drained conditions. If water may accumulate behind the wall, you must account for hydrostatic pressure separately. Proper drainage (weep holes, gravel backfill, drainage pipes) is essential for retaining wall performance.