1), Comply with GB, ASTM... ISO9000; 2), Exquisite surface; 3), Steady structure; 5), Low cost, high benefit Brand NameEach MetalItem Name:Steel StructureMaterial:Grade Q235, equivalent to ASTM A36.Grade Q345, equivalent to ASTM A572.Section:Any product shape according to customer's requirementsCertification:ISO quality system, Chinese GB50221-2001Sand Blast:Sweden SA 2.5 Sand blastingWelding: ...