... More than 50 years' service life 1.Metal Structure Building Main ComponentsMain FrameH beamPurlinC or Z section ... Xinhai Street,Weifang city,Shandong,ChinaEmployee690R&D Staff40Main ProductSteel Structure,Space Frame,Prefabricated House,Steel TowerProduction Lines9 production lines ... of light steel,heavy steel,space frame and tube truss. 5 production lines of ...