... . More than 50 years' service life 1.Metal Structure Building Main ComponentsMain FrameH beamPurlinC or Z section steelBracecross support, angle brace ... hydrauic shearing machine, Hydraulic sheet metal blending machine, Gantry submerged arc welding machine, Corrugated sheet molding machine, Shot blasting machine, Punching machine,Drilling Machine, Forging machine, H-section ...