This document presents a new patent for a composite material consisting of a plastic structure reinforced by an internal metallic skeleton. This allows for the creation of a strong, lightweight building element that combines the properties of metal and plastic. The patent has been granted in major countries and can replace the use of wood and reduce steel in construction. It offers advantages like lightness, durability, and recyclability. The inventor holds the unique worldwide patent and is seeking to license or sell it to companies in construction and engineering.