A reinforced concrete block retaining wall is 6′ 8″ high with a 4′ 5″ footing and is 12″ deep. The wall has 3/4″ vertical rods spaced 24″ O.C. What would be the size and spacing of the horizontal rods in the footing?

A reinforced concrete block retaining wall is 6′ 8″ high with a 4′ 5″ footing and is 12″ deep. The wall has 3/4″ vertical rods spaced 24″ O.C. What would be the size and spacing of the horizontal rods in the footing?