【Utilities – Civil Engineering Version】20181115
Thread Content
The preparatory work before installing the crane beam includes (). A: Measure the elevation of the top surface of the crane beam on the column surface. B: Using the ±0.000m elevation line on the column, use a steel tape to measure upward along the column surface to determine the designed elevation line for the top surface of the crane beam, which serves as a basis for adjusting its elevation. C: Mark the center line of the beam on the crane beam. D: On the top surface and both end surfaces of the crane beam, mark the center line with ink, using it as a reference for installation and positioning. E: When correcting columns with variable cross-sections, the theodolite must be positioned on the axis of the column row to avoid errors. Answer: ABCD
D: On the top surface and both end surfaces of the crane beam, mark the center line of the beam with a ink line, which serves as a reference for installation positioning
A: Measure the elevation of the top surface of the crane beam on the column surface. B: Using the ±0.000m elevation line on the column, measure upward along the column surface with a steel tape to determine the designed elevation line for the top surface of the crane beam, which serves as a basis for adjusting its elevation. C: Mark the center line of the beam on the crane beam. D: Mark the center line of the beam with ink lines on the top surface and both end surfaces of the crane beam, using this as a reference for installation and positioning. E: When correcting columns with variable cross-sections, the theodolite must be positioned on the axis of the column row to avoid errors