... -up welded H-section , hot-rolled H-section, channel, steel column, steel beam),standard frames, secondary framing, roof & wall materials, ... , exhibition hall, stadium and the like. Additionally, HDSS has it's own design institute and test&inspestion dept. and this ... -up welded H-section , hot-rolled H-section, channel, steel column, steel beam),standard frames, secondary framing, roof & wall materials, ...