1. before the installation of steel structure, check the components entering the site according to the component list, check the product certificate and design documents; when the pre-assembled components in the factory are assembled on site, they shall be carried out according to the pre-assembly records.

　　2. after entering the site, the steel structure members shall be subject to quality inspection to confirm whether there is deformation, damage and defect in the transportation process, and shall be handled in time together with the relevant famous departments.

　　3.Before assembly, the construction team shall check whether the geometric dimension, weld groove, camber, paint, etc. of the components meet the requirements of the design drawing, and report the problems to the relevant departments. In principle, they must be handled before hoisting.

　　4. main items of construction quality

A. Fill in the quality data carefully for each process, and the next process can be carried out only after the quality inspection meets the requirements.

B. The handling of construction quality problems must conform to the specified approval procedures.

C. The truss structure shall be installed according to the construction organization design, and the installation procedure must ensure the stability of the structure and not cause permanent deformation.

D. Before assembly, the components and parts entering the site shall be checked according to the component list, and the product certificate and design documents shall be checked.

E. The factory pre assembled components shall be reassembled on site according to the pre assembly records.

F. Before hoisting the components, the oil, ice, snow, mud, sand, dust and other sundries on the surface shall be clear.

G. Before the assembly of truss members, the positioning axis, foundation axis and elevation of moulding bed shall be inspected, and the foundation inspection shall be carried out.

H. After the structural parts are installed in place, they shall be corrected and fixed immediately.The structural members installed on that day shall form a stable space system.

1. During the assembly, installation and correction of steel structure components, corresponding adjustment measures shall be taken according to the influence of wind, temperature difference, sunshine and other external environment, welding deformation and other factors.

J. The welding construction shall be carried out according to the corresponding construction procedures. Before the construction, the professional technicians shall prepare the operation instructions and make disclosure