... of steel structure buildings. Steel material: Q345B=S355JR,SM490,ASTM A572; Q235B=S235JR,SS400,ASTM A36 Carbon structural steel: Q195, Q215, Q235, Q255, Q275, etc.High-strength ... Acceptance of Steel" (GB50205-2001)"Technical Specification for welded steel structure" (JGJ81-2002, J218-2002)"Technical Specification for Steel Structures of Tall Buildings" (JGJ99-9) Specifications: Steel frame: steel ...