US Patent 10323413 Building panel structure and method of manufacturing thereof

A building panel structure and a process for manufacturing the structure are disclosed. The structure comprises a concrete layer disposed on the outside of a building, an insulating material comprising polyurethane in the center of the structure and a corrugated steel layer on the inside of the building. A reinforcing assembly comprising an upper channel and a lower channel that are connected using a plurality of studs is embedded inside the building panel structure. The process of manufacturing the building structure comprises placing a wet concrete layer inside a container, positioning the reinforcing assembly in the container inside the wet concrete, setting the concrete layer and forming the polyurethane layer between the concrete and corrugated steel layers by an in-situ chemical reaction.