How Thick Should A Concrete Retaining Wall Be

Poured concrete foundation walls that are less than 8 feet tall and have soil outside that is 6 or 7 feet deep against the wall can often be 8 inches thick and function quite well. In general poured concrete basement walls that are 8 feet tall or less and have no more than 7 feet of soil pressing against them from the outside function well at a thickness of 8 inches. A poured concrete footing for concrete block or brick walls should be at least twice as wide as the planned wall.

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Determine the planned wall s height and width.

How thick should a concrete retaining wall be.

The footing should be at least as thick vertically as the wall s planned width. How deep should the footing be for a retaining wall. Increasing the strength of the concrete mix or the thickness of the wall increases the wall s capacity. The third step for your diy retaining wall is to prepare for footing.

The depth you need to excavate depends on frost depth as well as the wall and soil type. Using construction adhesive secure your block caps and create the top layer of your retaining wall. How thick should a concrete retaining wall be. For this you ll need to be careful on following the instructions on this video so you.

When a taller wall or a higher level of soil or both come into play the thickness should increase to 10 inches. As soon as you go higher or have greater depths of soil pushing against the wall you need to increase the thickness to 10 inches. Cover the gravel between your retaining wall and landscape with topsoil or sod so your garden will grow against your wall achieving a natural look. The angle of a sloping lawn should never be greater than 45 degrees and the gentler the slope the better.

That s why all strong retaining walls begin with landscape fabric backfill and 4 inch perforated drainpipe. Table 4a is based directly on the aci method but for table 4b the author has applied a reduced strength reduction factor a factor of safety. The footing dimensions will largely be determined by the size of the wall. Mortared or concrete walls in heavy frost areas require footings dug below the frost line.

No matter if you choose to build your retaining wall out of block brick stone wood or concrete the goal should be to integrate the retaining wall into your landscape. For example if you are pouring a retaining wall that will be 12 inches thick and will use wooden planks that are 1 1 2 inches thick for your forms you ll need to space the stakes about 15 inches apart 12 inches for the retaining wall plus two pieces of 1 1 2 inch thick wooden board. So taller walls in heavier soils should be made thicker or with stronger concrete. This can add several inches to the wall s thickness dimensions and can vary depending on the severity of exposure soil type and reactivity etc.

In addition to basic structural requirements wall dimensions generally member thickness are also affected by the required minimum reinforcement cover. The block caps should overhang the retaining blocks by 1 to 1 1 2 inches.

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