The local frost depth.
Concrete retaining wall footing depth.
Determine the planned wall s height and width.
The depth of the footing in the ground depends on.
To construct a footing for a dry stacked retaining wall excavate a trench that is 5 to 7 inches deep plus 1 inch for every 8 inches of planned wall height.
Ten inches is better and twelve inches is highly desirable.
A poured concrete footing for concrete block or brick walls should be at least twice as wide as the planned wall.
The torpedo base block is best suited to diy projects as it is the quickest and easiest to way to create a level foundation.
If the brick wall will be dry stacked rather than mortared the wall will not require a poured concrete footing.
Footing thickness 8 to 12 inches footing depth varies based on frost line and soil strength some footings can be shallow while other must be deep concrete calculator figure out how much concrete you ll need for your footings.
Wall height from top of wall to bottom of footing depth from the lower grade level to the bottom of the footing estimated wall and footing thicknesses and front and back face wall tapers if applicable preferred.
The footing dimensions will largely be determined by the size of the wall.
Eight inches is the minimum thickness for a footing.
Torpedo base block footing.
The depth of your concrete pad is dependent on the height of your wall and may be as deep as 450mm and require steel trench mesh for reinforcing.
Vertical walls up to about 3m in height are usually built as shown in figure 1 b.
These consists of a concrete or masonry wall of uniform thickness vertical wall reinforcing and transverse footing reinforcing are all designed for the lateral shear and cantilever bending movement plus the vertical weights of the wall footing and earth fills.
The footing should be at least as thick vertically as the wall s planned width.