题目内容
(请给出正确答案)
[单选题]
砖墙留直槎时需加拉结筋,对抗震设防烈度为6度、7度地区,拉结筋每边埋入墙内的长度不应小于()。
A.50m
B.500mm
C.700mm
D.1000mm
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A.50m
B.500mm
C.700mm
D.1000mm
A.490mm
B.370mm
C.240mm
D.180mm
E.120mm
A.1000mm,500mm
B.800mm,500mm
C.500mm,1000mm
D.800mm,500mm