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.
How thick should a poured concrete retaining wall be.
A poured concrete wall with rebar does not need to be thick to be strong.
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 the top of the stem of any cast concrete retaining wall should not be less than 12 inches for the proper placement of concrete.
B short retaining walls vertical walls up to about 3m in height are usually built as shown in figure 1 b.
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.
Concrete retaining wall footing size.
When a taller wall or a higher level of soil or both come into play the thickness should increase to 10 inches.
As laag points out the wall needs a sufficient footer.
Most landscape contractors in areas of heavy rainfall or weather extremes avoid fine poured concrete work due to its challenges.
The footing should be at least as thick vertically as the wall s planned width.
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.
Poured concrete walls can be tricky to install but look great with the architectural elements of a modern house.
Step 3 take the frostline into account.
Walls that have bends greater than 30 degrees at no more than 20ft intervals are stronger than straight walls.
For walls up to 3ft 5 5 inches thick works fine.