1) Design Engineering Service 2) Secondary Deep Framing 3) Tubular Steel Structures 4) Space Frames 5) Roof Wall ... , Ads, etc)Product/Service(We Sell): Steel structure design,steel structure manufacture,steel structure build in,installation of metal doors and ... welded H-section , hot-rolled H-section, channel, steel column, steel beam),standard frames, secondary framing, roof & wall materials, ...