题目内容
(请给出正确答案)
[单选题]
当采用碗扣式钢管脚手架作立柱支撑时,立杆应采用长( )的立杆错开布置,严禁将接头布置在同一水平高度。
A.1.2m和1.5m
B.1.8m和3.0m
C.1.8m和2.1m
D.1.5m和1.8m
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A.1.2m和1.5m
B.1.8m和3.0m
C.1.8m和2.1m
D.1.5m和1.8m
A.1.2m
B.1.5m
C.1.8m
D.2m
A.1.2m
B.1.5m
C.1.8m
D.2m
A.1.2m
B.1.5m
C.1.8m
D.2m
A.200mm
B.250mm
C.300mm
D.350mm
A.2mm
B.2.5mm
C.3mm
D.3.5mm
A.500mm
B.550mm
C.600mm
D.650mm
当碗扣式钢管脚手架的内立杆与建筑物距离大于()时,应选用窄挑梁或宽挑梁设置作业平台。
A.300mm
B.450mm
C.150mm
D.200mm