... transported 2.Full metal structure, resistance of deformation 3.High sealing quality; gaps are fully welded Steel structure ... : Material Q345(S355JR)or Q235(S235JR) steel, all bolts connection! Straight cross-section or Variable cross-section!5) ... alloy door shoring, cross bracing, tie-bar, intercolumniation. High-strength bolts and other components.Futures:.connection method: welding anti-distortion, ...