(1) make：
The production of steel structure, including layout, material, cutting, correction etc.. The friction surface of high strength bolts after the treatment, the anti slip coefficient should comply with the design requirements.
Production quality inspection qualified after derusting and painting. General installation weld left at 30 ~ 50mm not painting.
(2) welding：
The welder must pass the examination and obtain a certificate, and must be welded in its examination and approval within the scope of the project. Weld seam welding to weld and parts in the process of playing the provisions of welder seal.
Welding material and base material should be matched, one or two full penetration weld should be used in ultrasonic flaw detection of internal defects inspection, ultrasonic inspection can not make a judgment on the defects, using X-ray detection.
The first construction unit Use of steel, welding material, welding method, welding technology evaluation.
(3) transport：
Transport steel members, according to the length and weight of the steel members choose vehicles. Steel members on the vehicle's support, the length of both ends out and binding method shall ensure component not deformation, do not damage the coating.
(4) install：
According to the construction organization design and installation of steel structure, the installation program to ensure the stability of the structure and do not lead to permanent deformation. Install the column when the positioning axis of each column should be controlled from the ground directly on axis. The main component of steel columns, beams, trusses, after installation, should be corrected and fixed immediately.
The friction surface by component factory processing, to reinspect the anti slip coefficient before installation, qualified rear can be installed.
(5) Fire and rust:
1）The poor fire resistance of steel structure. When the temperature reached 550 degrees, the steel yield strength approximately to normal temperature when the yield strength of 0.7, which reached its structural strength design value will be destroyed.
The design should be in accordance with the provisions of relevant fire regulations, the building structure can meet the