A.1 B.2 C.3 D.4
A.200mm B.250mm C.300mm D.350mm
在受拉鋼筋錨固長度計算公式中,α為鋼筋外形系數(shù),對螺旋肋鋼絲其取值為()
A.0.13 B.0.14 C.0.15 D.0.16