How Deep Concrete Footing For Retaining Wall
The footing must be as broad as the plinth and must go as deep as the frost line.
How deep concrete footing for retaining wall. The size of the trench and diameter of the rebar depends on the purpose for the wall such. Thoroughly planned and ably performed wall construction will help to ensure the retaining wall s stability. The footing is usually made of poured concrete but in some situations homeowners may instead opt to simply use tamped earth or a gravel base. A natural stone or brick retaining wall laid by a mason can cost upwards of 20 per square foot and a poured concrete retaining wall will set you back 13 to 18 per square foot.
It s best to pour the concrete footings thick when building mortared stone walls. That s why all strong retaining walls begin with landscape fabric backfill and 4 inch perforated drainpipe. To make a retaining wall the stone or other immutable material must be make a 45 degree angle into the hillside. Height vertical thickness of the concrete footing.
Then take a shovel and pickaxe and begin digging the footing area for your retaining wall. Find nearby slab and foundation contractors to help with your. One key aspect of retaining wall construction is preparing a solid footing or foundation. Concrete calculator figure out how much concrete you ll need for your footings.
Footing depth varies based on frost line and soil strength some footings can be shallow while other must be deep. Cabo one and two family dwelling code. Any other form of wall will eventually collapse. Footing thickness 8 to 12 inches.
A retaining wall is used to stop soil or dirt in one area typically elevated from moving down to a lower area. How deep should the footing be for a retaining wall. In new england where i live the frost line is 4 feet deep so i have used that depth in the diagram. Mortared or concrete walls in heavy frost areas require footings dug below the frost line.
The depth you need to excavate depends on frost depth as well as the wall and soil type. Again refer to the plans for the retaining wall to determine how deep you will need to dig the footings. If you don t have a plan for your wall you should consult with the local building inspector to find out how deep the footings will need to be based. If you are new to this type of project here are a few tools and materials that you may need as well as some steps to help guide you through the process.
Footers for block walls consist of a footing trench steel reinforcement rods rebar and concrete.