Prefab sandwich panel industrial living /office houses, portable modular mobile house K type prefab house. The components of the steel structure have small section, light weight, easy to transport and installation, suitable for large span, high height, heavy bearing structure. Suitable for withstand impact and dynamic load, with good seismic performance.The internal structure of steel is uniform with high reliability. Factory mechanized production of steel structure components finished products of high precision, high production efficiency, site assembly speed, short construction period.