A foundation for building superstructures is formed of metalogs that define an aboveground enclosure, a confined first fill that substantially fills the enclosure to a height sufficient to anchor and support the superstructure, and a loose second fill that is placed atop the first fill and leveled and compacted to form a hardpan floor.

A logging notch assembly having a head member and a body member. The head member includes a head front face, a tapered upper face diagonally positioned downwards towards the head front face, a top face with a head connector member protruding from a central region of the top face, and a tapered lower face diagonally positioned upwards towards the head front face. The bottom face incudes a head channel positioned through a central region of the bottom face and receives the head connector member, a pair of side faces with an upper surface positioned between the top face and a side face of the pair of side faces, a lower surface positioned between the side face and the bottom face, an end surface positioned between the upper surface and the lower surface.