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提问人:网友13***556 发布时间:2022年4月6日 06:42
[单项选择题]

在管道支架安装要求中,当设计未要求时,固定墩的质量应符合的要求是()。

A.混凝土固定墩的强度等级不低于C10

B.钢筋直径不应小于9mm,其间距不应大于250mm

C.钢筋应双层布置,保护层不应小于35mm

D.管道穿过固定墩处,孔边应设置加强筋

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