Several preparatory works in the early stage of high rise steel structure installation

1. Design and manufacture of short distance transportation vehicles for high-rise steel structure installation and steel structure components. Requirements to meet the basic requirements of handling and walking, with convenient connection and release function.

2. Number each column according to the axis position, and check whether the column size meets the drawing size requirements: such as column length, section size, column bottom to bracket surface size, bracket surface to column top size, etc.

3. On the three sides of the column, pop up the column center line with ink line, and draw three horizontal marks on the center line of each side. The distance between the marks was measured.

4. Preparation of short distance transportation road for steel structural members on site. Including the basement roof transportation support reinforcement measures. There should be detailed theoretical calculations.

5. Check and verify the quality of manufactured steel structure parts. Adjust or rework the unqualified steel structure parts.

6. Prepare for stacking materials on site. The bearing capacity of foundation is calculated.

7. Prepare the hoisting machinery rigging. Prepare signal transmission tools. For the safety of construction personnel. After the lifting operation is completed, the construction personnel do not need to climb to the lifting point to solve the problem. Design and manufacture of automatic buckle tools. When the lifting operation is completed. The construction personnel can untie the knot from the bottom. It is a means to reduce the construction personnel working at height.

8. Recheck the center line of the foundation and its spacing, the height of the top surface of the foundation and the bottom of the cup to meet the design requirements after installation.

9. Adjust the elevation of cup bottom and check whether the length from support surface to column bottom meets the design requirements. Otherwise, the bottom elevation of the cup should be adjusted according to the actual length of the column, so that the elevation of the column after hoisting can basically meet the design requirements.

10. The actual tower crane hoisting different specifications of steel structure components produce different displacement in different lifting process. Tabulate the calculation results. It is used for hoisting and positioning of steel structure components.