Patent ID: 7444786

Claim:
A structural system comprising the following: a first pre-cast structural element including an interior layer cast from a cementitious material, an exterior layer cast from a cementitious material, an insulating layer between the interior layer and the exterior layer, the insulating layer substantially completely isolating the interior layer from the exterior layer, and at least one sleeve; a second pre-cast structural element including an interior layer cast from a cementitious material, an exterior layer cast from a cementitious material, an insulating layer between the interior layer and the exterior layer, the insulating layer substantially completely isolating the interior layer from the exterior layer, and at least one sleeve; at least one cushion between the first and second structural elements creating airspace such that there is no contact between the first and second structural elements; and at least one gasket between the first and second structural elements, the at least one gasket between and surrounding the at least one sleeve of the first pre-cast structural element and the at least one sleeve of the second pre-cast structural element which are aligned; wherein grout poured into the at least one sleeve of the first pre-cast structural element and the at least one sleeve of the second pre-cast structural element forms a grout sleeve to secure the first pre-cast structural element to the second pre-cast structural element and creates a grout bearing pad to provide force transfer between the first pre-cast structural element and the second pre-cast structural element.