Patent ID: 7452164

Claim:
A retaining wall structure comprising a first plurality of hardenable building units positioned adjacent to one another forming a first horizontally-extending course, a second plurality of hardenable building units positioned adjacent to one another above said first course forming a second horizontally-extending course, and interconnecting members between said first course and said second course, said interconnecting members comprising a body having an upper side and a lower side, each said side having a plurality of projections thereon, said projections being capable of protruding into said hardenable building units in said first course and said second course, said body extending across at least part of two horizontally-adjacent hardenable building units in said first course or said second course, with said projections on said upper side or said lower side positioned to protrude into said two horizontally-adjacent hardenable building units, said projections on said lower side comprising at least three projections positioned on said lower side to support said body in a generally horizontal position on said first course when said interconnecting member is placed on said first course.