1 年
The Spruce on MSN26 Retaining Wall Ideas Perfect for Sloped BackyardsWhether your backyard is a gently sloping lawn, rolling hills, or a steep patch ... concrete multi-level retaining walls ...
Size the trench so there's enough room for the retaining wall block and at least 8 in. of space behind it. Excavate deep enough to completely bury at least one full course, including space for 6 ...
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