Developed from concept to the current state of the art by a professional structural engineer, this standard wall panel cross-section shown below illustrates the basic design of the wall and door vertical panel assemblies.  The floor assemblies are similar but of heavier duty design.  The roof assemblies are of a SIP design for enhanced insulative properties. The wall design shown below has proven to be simple and rugged, yet effective against fire and heat transfer.  The initial focus of the design was to provide secure, transportable, pre-manufactured modular shelters for affordable housing.  The utility of the design quickly expanded to other uses.  The panels are mold and termite proof having no bio-materials used in their construction.  The thermal break thickness and air pockets shown below may be filled with optional materials to enhance other desired characteristics, like nuclear / EMP radiation resistance, bullet / blast resistance etc.  The water resistance of the MGO board allows for easy scrub down and clean out of the shelter in case of chemical or drug contamination.  The walls are fundamentally strong in shear for extreme wind and earthquake soundness.  The metal strut perimeter provides protection to the MGO panel edges and a fastening means to adjacent panels.