![](https://static.youtibao.com/asksite/comm/h5/images/m_q_title.png)
[单选题]
光圆钢筋末端做180°弯钩时,弯钩的平直长度不小于钢筋直径的()
A.2.5d
B.3d
C.5d
D.10d
![](https://static.youtibao.com/asksite/comm/h5/images/m_q_a.png)
B、3d
![](https://static.youtibao.com/asksite/comm/h5/images/solist_ts.png)
A.2.5d
B.3d
C.5d
D.10d
B、3d
A.2.5;3
B.3;2.5
C.3;3.5
D.3.5;3
A.碳素钢丝束采用镦头锚具时,其长度按孔道长度增加0.30m计算
B.直径为d的HPB300光圆钢筋,端头90°弯钩形式,其弯钩增加长度为3.5d
C.弯起钢筋增加的长度为S-L,弯曲度数为30°时,弯起增加长度为0.414h
D.钢筋混凝土梁柱的箍筋长度仅按梁柱设计断面外围周长计算