Stair Stringer Attachment To Concrete Floor

When attaching a stair stringer to the concrete floor we will need to use treated wood. In doing so we will have to allow for this when laying out the stringers, in this case we are using 2 x 4 treated lumber which is 1 - 1/2 inches thick. We will need to subtract 1 - 1/2 inches from the bottom of the stringer.