鋼筋 Rebar
鋼筋是指鋼筋混凝土用和預應力鋼筋混凝土用鋼材，其橫截面為圓形，有時為帶有圓角的方形。包括光圓鋼筋、帶肋鋼筋、扭轉鋼筋。鋼筋種類很多，
通常按化學成分、生產工藝、軋製外形、供應形式、直徑大小，以及在結構中的用途進行分類。
鋼筋混凝土用鋼筋是指鋼筋混凝土配筋用的直條或盤條狀鋼材，其外形分為光圓鋼筋和變形鋼筋兩種。鋼筋在混凝土中主要承受拉應力。
變形鋼筋由於肋的作用，和混凝土有較大的粘結能力，因而能更好地承受外力的作用。
鋼筋廣泛用於各種建築結構、特別是大型、重型、輕型薄壁和高層建築結構。
Rebar refers to the steel used in reinforced concrete and pre-stressed reinforced concrete, and its cross-section is in a round shape or sometimes has circular angles. There are many types of rebar, including plain round steel bars, ribbed steel bars, and twisted steel bars, categorized commonly by their chemical compositions, production technology, outer shape after rolling, ways of supply to customers, size in diameter, and purposes. Rebar used in reinforced concrete refers to straight bars and rod coils, and there are two types of Rebar used in reinforced concrete: Plain round steel bars and deformed bars. Rebar is exerted tensile stress when used in reinforced concrete. Deformed bars have bigger adhesion with reinforced concrete because of the effect of rib, thus can endure more and bigger external forces. Rebar is used extensively in a lot of architectural structures, particularly in large-scale and heavy high-rise building structures.