... and erection of the Prefabricated(pre-engineered) Steel Building,Space Frames, Portable Cabins, Tubular Steel Structures,basic building elements ... H-section , hot-rolled H-section, channel, steel column, steel beam),standard frames, secondary framing, roof & wall materials ... H-section , hot-rolled H-section, channel, steel column, steel beam),standard frames, secondary framing, roof & wall materials ...