... d'1,mg, d?c bi~t la cac cong trinh xay dl,lIlg dan d1,lng va cftu duemg 2.2 CO' c§u gia thep t~i Vi~t Nam HuYnh Thuy Ki8u Dung (2013) cho r~ng cO' ch~ gia thep tren -thj truemKduqc x§y dl,rng nhu sau: