当采用冷拉方法调直时,HPB235. HPB300光圆钢筋的冷拉率不宜大于4% ;HRB335.HRB400.HRB500.HRBF335.HRBF400.HRBF500及RRB400带肋钢筋的冷拉率不宜大于( )。( )
A.4% B.3% C.1% D.5%正确答案C
当采用冷拉方法调直时,HPB235. HPB300光圆钢筋的冷拉率不宜大于4% ;HRB335.HRB400.HRB500.HRBF335.HRBF400.HRBF500及RRB400带肋钢筋的冷拉率不宜大于( )。( )
A.4% B.3% C.1% D.5%正确答案C