Will said soil get saturated with water eg rain.
How thick should a concrete retaining wall be.
If the wall is higher than 4 feet place a second row of weep holes 3 inches above the first.
When a taller wall or a higher level of soil or both come into play the thickness should increase to 10 inches.
For information on how to measure and place the foundation see our foundations projects here.
That depends on many factors some of which are.
How high is the wall.
Concrete retaining wall footing size.
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.
One of the things you must get right is the thickness of the wall.
The footing should be at least as thick vertically as the wall s planned width.
Firstly the foundation you place should be a minimum of 150mm 6 inches thick.
It should be at least 215mm thick and bonded or made of two separate brick skins tied together.
What type of soil or material is it retaining.
Plotting the thickness 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.
After mixing your concrete pour the wall in horizontal layers of not more than 20 inches beginning at the ends and moving toward the center.
The basic rules governing the building of a garden retaining walls are simple.
The first row should be 2 inches to 4 inches above ground level.
Retaining walls can be tricky to build as they need to be strong enough to resist horizontal soil pressure where there are differing ground levels.
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.
You would always have to assum.
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.
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.
The footing dimensions will largely be determined by the size of the wall.
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.