Abstract: A structural system includes a plurality of pre-cast structural elements. Each of the elements includes an interior layer, and an exterior layer cast of a cementitious material, an insulating layer lies between the interior layer and the exterior layer. The pre-cast structural elements are stacked adjacent one another to form a wall. A respective cushion is placed between adjacent structural elements. The cushions create airspaces such that there is no direct surface contact between adjacent structural elements. Poured grout sleeves tie one structural element to another creating a structural composite. Grout from the sleeves form bearing pads between adjacent elements and allow for load transfer within the structural composite. The exterior layers of the structural elements can be provided with simulative exterior surfaces, for example, with exterior surfaces simulating the appearance of structural logs.