Construction process of steel structures

The construction of steel structures is divided into two main steps, namely factory fabrication and site erection.

Factory fabrication includes the following processes:

1, the acceptance, organization, and storage of steel, including necessary corrections;

2, Layout according to the construction drawings, make samples and rods, and according to the delineation and undercutting;

3, the scribed steel for shearing (flame cutting), punching (drilling) holes edge planing, and other processing, non-flat parts need to be simmering bending and roll rounding, and other processes to shape;

4, the deformation caused by the processing of parts for leveling (roll flat, top flat);

5, the parts are assembled into components according to the drawing, and welding (riveting);

6, Correct the deformation caused by welding;

7, Descaling and painting.

Site installation work includes:

1, Expanded assembling on site;

2, the expanded assembly of the components (substructure) lifting in place, interconnected, and temporarily fixed;

3, Adjust the relative position of each part to meet the requirements of installation accuracy, and do the final fixing;

4, Anti-corrosion and fireproof spraying.

It is important to note that the construction process, especially the machining phase, inevitably has an impact on the properties of the steel structure, such as cold work hardening and welding thermal effects.