metal structure with painted steel beams, metal plates and bolts

activity architectural beam beams bolt bolted bolts building built carpentry column connection construction crossbeam engineer engineering fastener flange flanges galvanized galvanizing girder girders industry ipe iron ironwork joint metal metallic nut nuts painted pillar plate plates precast prefabricated profile reinforcement rod roof screw screwbolt stainless steel structural structure structures wide zincplated