Retaining Wall Drainage Stone Size

The largest of the crushed stone grades.
Retaining wall drainage stone size. Crushed stone 8 sizes from 3 8 to 1 2. One of your best options is our inch clear drainage stone. We go about 6 8 deep behind the wall with loose rock usually crushed granite and up to the second row from the top. The wall gets its strength from a sturdy base consisting of gravel about 5 inches deep for short walls and about 7 inches for tall walls which helps prevent sifting and allows water to drain.
The exact depth of the. Typically residential retaining walls are built between 3 and 4 feet high. This is so that when water gets into the space it does not become bogged down in soil but instead can flow down the wall to the drains or weep holes. Whenever you hear the term backfill it means the dirt that rests immediately behind your retaining wall.
Crushed stone 1 sizes are from 2 to 4. For drainage and railroad projects. Crushed stone 3 sizes from 1 2 to 2. Fabric keeps soil from leeching out of walls.
Fourth it s important to know that the height of a retaining wall determines the load it can bear and how much extra reinforcement will be necessary. The beauty and coarseness of the stone don t matter because it should be covered by a top layer of gravel. And third is to ask if weep holes will be needed to allow water to drain through the wall. Use fabric behind the wall.
Fabric keeps rock and soil separate. This loose rock is probably more than other companies would use but we would rather allow more water to flow behind the wall and out than not have enough. For a stacked block retaining wall that s no higher than four feet a trench filled with three inches of crushed rock will help keep the wall from shifting and settling. For proper drainage the first 12 inches of space behind a retaining wall should be filled with crushed stone or gravel.
1 this is commonly used as a base for roads slabs driveways walkways crushed stone patios interlocking walls and is also used for drainage stone projects septic systems and dry wells. For concrete and asphalt mix. For larger jobs such a culvert ballast. Rather than just filling in with garden soil clay or any other material that you may have it is very important that you use at least 12 inches clean crushed stone as backfill.