... MATERIAL:Q195, Q215, Q235, Q275, Q345, 20#, 45#, Stainless steel, Seamless steel, Alloy steel.3. SURFACE:Bared, Galvanized, Oiled, Color Paint, 3PE; Or ... , expressway, overpass, road fence, traffic signs.(3).Construction engineering: steel structure construction, sports venue, three-dimensional garage, exhibition hall.(4 ... Angle90°±1.0°90°±1.5°Corner radius of circular arct≤6mm(1.5-2.5)t6mm≤t≤10mm( ...