construction materials of metal; metal materials for construction; construction materials made of metal; metal materials for building; building materials made of metal; building materials of metal; metallic building materials; fabricated metal components for building foundations [construction materials]; construction frames of metal; framework of metal for building; building structures made of metal; building structures of metal

construction; building construction; construction of steel structures; building construction and repair; steel structure construction works; building construction services; construction of buildings; factory construction