Concrete Foundation Wall Thickness

Concrete foundation walls with corbels brackets or other projections built into the wall for support of masonry veneer or other purposes are not within the scope of the tables in this section.

Concrete foundation wall thickness.

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. It is recommended to have at least 8 inches above the dfe at all points. Where a concrete foundation wall is reduced in thickness to provide a shelf. Concrete masonry is used to construct various foundation wall types including full basement walls crawlspace walls stem walls and piers.

For larger foundation wall depths the minimum thickness must be the greater of 6 inches or 1 5 times the length of the footing projection from the foundation wall. Adequate strength needs to be provided and should be demonstrated by analysis in accordance with the aci 318 design equations and the recommendations in this section. 4 the thickness and reinforcing of foundation walls made of reinforced concrete block and subject to lateral earth pressure shall conform to table 9 15 4 2 b. B the thickness of the concrete in the wall above.

Foundation walls shall extend at least 8 above the finished grade adjacent to the foundation at all points. 3 foundation walls made of flat insulating concrete form units shall be laterally supported at the top and at the bottom. Concrete foundation walls support the home standing above so any weakness can undermine the stability of the house. Minimum foundation wall and wall footing thickness.

The 7 1 2 inch minimum thickness requirement is obviously impractical for a short concrete stem wall as in a crawlspace foundation. The thickness of concrete foundation walls shall be equal to or greater than the thickness of the wall in the story above. 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. When you are building a masonry or concrete foundation wall it shall have a minimum thickness of 6 inches.

The appropriate depth of the wall depends on several factors and there is no single standard for every home. The minimum thickness is also determined by wall height soil classification and the height of unbalanced backfill or backfill on only one side of the wall. Concrete masonry is well suited for below grade applications because of its strength durability economy and resistance to fire insects and noise. The minimum reinforced concrete footing thickness will be 6 inches or.

For masonry or concrete construction the minimum foundation wall will be 6 inches.