Scaffold refers to various supports erected on the construction site for workers to operate and handle vertical and horizontal transportation, mainly for the construction workers to work up and down or for the enclosure of peripheral safety nets and high-altitude device components.

To put it bluntly, it is to build a scaffold, which is convenient for construction workers to use all four limbs, and it is convenient to climb up and down, so it is called scaffolding.

Compared with the general structure, the working conditions of scaffolding have the following characteristics:

1. The load is highly variable;

2. The joints connected by fasteners are classified as semi-rigid, and the rigidity of the joints is related to the quality of the fasteners and the quality of the device, and the function of the joints has great variation;

3. The scaffold structure and components have initial defects, such as the initial bending and corrosion of the rods, the erection size error, the load eccentricity, etc. are relatively large;