The lower the bearing capacity of the soil the wider the footing needs to be.
Footing size for concrete retaining wall.
Concrete blocks are a common building material for a variety of outdoor projects such as retaining walls and out buildings like garages and tool sheds.
Footers for block walls consist of a footing trench steel reinforcement rods rebar and concrete.
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.
Discontinuous footings work fine for concrete walls which can be reinforced to take the loads.
The third step for your diy retaining wall is to prepare for footing.
A typical situation where a garage stemwall abuts a main basement wall can be handled by reinforcing the short section of wall that spans the opening with two 4 bars at the top and bottom extending 3 feet into each adjoining section of wall above.
If the soil is very strong the footing isn t even strictly necessary just the soil under the wall would be enough to hold the building up.
Here are the minimum widths for concrete or masonry footings.
The size of the trench and diameter of the rebar depends on the purpose for the wall such.
The depth to the bottom of the base slab should be kept at a minimum of two feet.
For this you ll need to be careful on following the instructions on this video so you.
A poured concrete footing for concrete block or brick walls should be at least twice as wide as the planned wall.
Concrete retaining wall footing size.
Determine the planned wall s height and width.
Make sure that you check your building plans and measurements to determine the size of the reinforcing rebar.
Lay down the rebar to reinforce the footing.
The footing should be at least as thick vertically as the wall s planned width.
However for even the most modest block structure to have enough rigidity to bear pressure and weight it needs proper footing.
The footing dimensions will largely be determined by the size of the wall.
The footing transmits the load into the soil.
You can use a saw with an abrasive blade in order to cut the rebar to the size that you need.
However it should always be below the seasonal frost line and that often is much deeper in northern climates.