Patent ID: 8276341

Claim:
A wall structure, comprising: a base; an elongated first panel disposed on the base in a horizontal position; an elongated second panel disposed in a horizontal position on the first panel and parallel to the first panel; a horizontal elongated third panel disposed on the base, parallel to and spaced from the first elongated panel; a horizontal elongated fourth panel disposed on the third panel and parallel thereto; the first panel and the second panel defining a first wall above the base; the third panel and the fourth panel defining a second wall spaced from the first wall to form an elongated opening; a cementitious material disposed in the opening between the first wall and the second wall; wherein the first, second, third, and fourth panel are identical and wherein each of said panels comprise an outer face and an inner face, with a upper tapered face and a lower tapered face; wherein said upper tapered face depends from the outer face and terminates at a first flat surface, said first flat surface is proximate and parallel to the inner face and runs the length of the panel, wherein an uppermost edge of the first flat surface extends beyond an uppermost edge of the inner face to define a channel having a flat top face having a longitudinally running vertical slot therein which is adjacent and parallel to the first flat surface; wherein said lower tapered face depends from a lower end of said outer face toward the inner face parallel to said upper tapered face and terminates at a second flat surface which is co-planar with said first flat surface, the lower tapered face and second flat surface defining a groove that is complementary in shape to a profile defined by the upper tapered face and first flat surface; further comprising a metal reinforcing member disposed at right angles to the first elongated panel and the third elongated panel, the reinforcing member having a first and second integral lip depending from opposite ends of a central elongated web, wherein said first lip is disposed in the vertical slot in said first panel and said second lip is disposed in the vertical slot of said third panel.