... Deep Framing 3) Tubular Steel Structures 4) Space Frames 5) Roof Wall Materials Product Name:Ningbo south bonded ... erection of the Prefabricated(pre-engineered) Steel Building,Space Frames, Portable Cabins, Tubular Steel Structures,basic building elements( ... hot-rolled H-section, channel, steel column, steel beam),standard frames, secondary framing, roof & wall materials, Tempcon (sandwich) panels ...