... , Height Strugth,light weight 2. Easy to install 3. Antirust,insulation,long service time 1.Building Structure Main ComponentsMain FrameH beamPurlinC ... strenght boltRoof &Wallsandwich panel or steel plateSandwich panel materialsEPS, polyurethane, rock wool, glass woolWindowPVC or aluminum alloy doorDoorsliding or rolling door2.Company ...