When a vapor barrier is under the footing, the footing is not in direct contact with the earth.250.52(A)(3) Concrete-Encased Electrode. An electrode encased by at least 50 mm (2 in.) of concrete, located within and near the bottom of a concrete foundation or footing that is in direct contact with the earth,........
How about when they dig out for the footing and then compact crushed stone for a base under the footing?
Is this in direct contact or do they mean virgin soil?
What if the footing is directly on ledge? Will it make a good concrete encased electrode?
[ August 02, 2005, 05:53 AM: Message edited by: tkb ]