1. Form up 22 inch wide by 16 deep foundation.
2. Form keyway or trough 9 inches wide by 4 inches deep.
3. Remove forms and observe standard round top foundation.
4. Arches site in footings and are grouted in the foundation.
1. Down and away on the outside so moisture runs away.
2. Flush on the inside.
Caution: Any changes to the foundation must be approved by a licensed engineer.