... Structure Co.,Ltd is a professional 200mm to 400mm conical steel poles manufacturer and factory,Website:http://www.china ... 3 meter to 15 meterSuit forAirport, seaport, roadway, etcShapePolygonal, Conical or ColumniformMaterialNormally Q345B/A572, Minimum Yield Strength ≥ 345 N ... Strength ≥ 235 N/mm²As well as Hot rolled coil from ASTM A572 GR65, GR50, SS400Tolerance of the dimensionAccording ...