【Utilities – Civil Engineering Version】20181106
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The preparatory work before column installation includes the following () tasks. A: Project the axis of the column column onto the top surface of the column base. B: Mark lines on the column shaft. C: Level the bottom of the cup. D: The actual elevation of the top surface of the bracket and the top surface of the column should be consistent with the design elevation. E: The allowable vertical deviation for the column shaft is ±5 mm when the column height is ≤5 m. Answer: ABC
B：Marking the column shaft C：Leveling the bottom of the cup
A: Project the column axis on the top surface of the column base; B: Mark lines on the column shaft; C: Level the bottom of the cup