prefabricated steel structure Sandwich wall panel cladding Q235B/Q345 H beam strong seismic and wind resistance large span If you need: Opinions 1)steel building, 2)metal building, 3) modular house, 4)steel structure warehouse, 5)workshop, 6) garage, 7)steel beams, other riveting and welding parts. 8) OEM projects STEEL STRUCTURE:WE HAVE A PROFESSIONAL TECH-TEAM, CAN PROVIDE YOU DESIGN,STRUCTURE ...