Preparation of steel beams before installation of steel structures

The preparation work before the steel structure beam installation is to ensure the smooth construction process of the steel structure project, so as not to affect the overall construction period of the steel structure project due to some common reasons.

Before the installation of steel structural beams, the steel components delivered to the site shall be inspected comprehensively, including the beam plane center line, elevation datum line, component dimensions, bolt hole position, diameter, number of plates and quality. Welding groove quality, weld appearance quality of components, welding nails, male rub surface treatment, anti-corrosion coating, appearance, etc.; The deformation, defects and dust, mud and sand, dirt and other unqualified parts of the components should be corrected and trimmed on the ground, and qualified before the installation of steel structure.

Retest the elevation and geometric dimension of the shank of the steel column after checking all the data of the material. The positioning axis of the shank should be complete.

On the main beam to be installed, draw the positioning axis connected with the leg and the secondary beam installation positioning line; Draw a positioning axis on the crane beam to be installed to connect with the leg.

Self-propelled crane is commonly used for hoisting steel crane beam, and two symmetrical lashing points are generally adopted for steel crane beam lashing, with a slip rope tied at each end to pull into position and prevent collision between steel and steel during hoisting.

After lifting the steel crane beam, rotate the bone rod of the crane to align the center of the crane beam with the emplacement center. When it is about 100mm away from the supporting surface, the hook should be slowly dropped. Align the center line of the crane beam with the positioning axis of the ox leg by manual righting, and connect all the bolts connected with the column.