Corrugated preprinted steel sheet, corrugated galvanized steel sheet, corrugated zinc-alume roof tile, corrugated aluminum sheet, corrugated stainless steel sheet, steel decking floor, EPS (polystyrene foam) sandwich panel, XPS (expanded polystyrene) sandwich panel, PU (polyurethane) sandwich panel, rock-wool sandwich panel, glass-wool sandwich panel, c purline, z purline, steel frame profile and prefab house.