Retaining Wall Footing Depth
Estimate the depth you need for a small garden retaining wall.
Footing depth below grade
6"
Gravel base
3"
Total dig depth
9"
Lateral earth pressure
16 psf
Sliding check
Stable at H ≤ 7″ (rule-of-thumb)
About this tool
Inputs: height, length, soil type, surcharge. Outputs: recommended footing depth, gravel base, total dig, lateral pressure, and a sliding-check verdict. Targets r/DIY '7" tall retaining wall' thread.
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