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我国从1992年3月起开始采用新的钢筋标准,由原先的钢筋标准GB1499—84修订分成两个标准,即GB13013—91钢筋混凝土用热轧光圆钢筋和GB1499—91钢筋混凝土用热轧带肋钢筋。新标准对钢筋的强度等级代号、带肋钢筋的外形与级别有新的规定,现简要介绍如下:1.光圆钢筋光圆钢筋级别仍为Ⅰ级,强度等级代号为R 235(R为钢筋混凝土用光圆钢筋的代号,235代表该钢筋屈服点规定最低值为235兆帕),钢的牌号规定为Q235(Q是代
China has adopted new steel bar standards since March 1992. It has been revised from the original steel bar standard GB1499-84 to two standards, namely GB13013-91 hot-rolled light round steel bars for reinforced concrete and GB1499-91 hot rolled steel bars for concrete. Rib reinforcement. The new standard has new regulations on the strength grade code of steel bars and the appearance and grade of ribbed steel bars. It is briefly introduced as follows: 1. The level of steel bars for light steel bar is still grade I, and the code for strength grade is R 235 (R is the bar The code number of the light bar used for concrete is 235, which means that the minimum value of the bar’s yield point is 235 MPa. The steel grade is Q235 (Q is the