Block would require a 16 in.
How to build a footing for a concrete block wall.
For example a typical 8x8x16 in.
Pour the concrete to the top of the footer.
Use an iron rake to push the concrete around as necessary.
Mix up concrete in a wheelbarrow and dump concrete into the trench.
Add 2 feet 0 61 m 60 96 cm on either side.
Start the concrete footing by digging the area of the wall a few inches below the frost line the maximum depth in the ground below which the soil does not freeze during the winter consult a structural engineer to design the footing including where to install the vertical reinforcement which usually is placed.
Specifically you can make them at least 12 inches in height.
Set your footings 2 feet 0 61 m 60 96 cm across.
Wide footing and extend below the frost line.
What type of footing is required for a concrete block wall.
Always check local building codes for construction requirements in your area.
This properly spaces the form work and allows you the space you need to lay your foundation.
Have a helper go back to mix and dump successive loads of concrete until you have filled the trench to the appropriate level which in this example is 7 inches.
To construct a block wall you need to establish a solid footing that is a minimum of twice the width of the concrete block.
Top this with 1 inch of coarse sand or small gravel before constructing the wall proper.
Height vertical thickness of the concrete footing.
Tie string along each stake to mark the perimeter of the footing area.
If concrete is not being used to build the footing as is common for drystacked stone walls and very short walls the footing can simply consist of about 6 inches of compacted base material like angular sharp edged gravel.
Allow it to cure overnight before removing the flat stakes.
It s best to pour the concrete footings thick when building mortared stone walls.
If you re building a really big wall pour them even thicker taller because the concrete footing will need to support more weight.
Order the concrete from a redi mix company or order bags of dry concrete and mix it on site.
Align the 2 inch wide by 10 inch long 5 08 cm wide by 25 4 cm long boards to build the forms for your footings.
The string will create a barrier and help you stay within the marked lines when pouring the footing.