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I have read that the minimum thickness of a poured concrete foundation wall for a two-story home is eight inches. When the foundation must support brick siding a ledge must be poured. Must this ledge be in addition to the eight inch width, or may it be included in it? If the latter, you end up with only a four inch wall under the sill plate to support the load of that wall, and other four inches of the wall is stepped down and forms a ledge for the siding.
Does this meet code in most places? Is it common practice?
Location: northern Virginia.