The fabrication and installation of steel structure is a complex system engineering. Before construction, various construction process documents must be carefully prepared. It plays a directive, guiding, normative and coordinated role in the fabrication and installation of steel structure.Steel structure engineering production process documents include steel structure production plan, process card, process line card and process card.

　　1.The process plan is the main guiding document for the preparation of steel structure manufacturing process, and the basis for the preparation of process procedures and technical organization measures.

　　2.The process route card is prepared according to each part of the product, which specifies the route of the parts (components) in the whole processing process, lists the name of the processing workshop, group, each process, the equipment and process used, etc. which are the basis for workshop division and production scheduling.

　　3.The process card shall be prepared according to each process stage of parts and components; it specifies the processing objects in the production process and in each process stage, and the work to be done, as well as the equipment, process equipment, work volume, work time quota, material specification and material used in each process, which is mainly used to guide the production activities of steel structure workshop.

　　4, process card refers to the operation card, which is prepared according to the parts’ offensive process; it specifies the operation methods and requirements of each process; its function is mainly to guide the workers’ operation in detail to ensure that the processing meets the predetermined requirements.

What are the common defects of steel structure manufacturing quality?

The common quality defects of steel structure manufacturing refer to the quality defects of parts, components and components in the manufacturing stage of the factory;In the case of not meeting the quality standards specified in the design and steel structure construction specifications, the phenomenon of blind transportation to the installation has caused great difficulties to the steel structure installation process, so that the production and installation units often have disputes and seriously affect the quality of steel structure engineering structure and delay the construction progress.

Common quality problems

　　1.Dimension deviation of steel column, roof truss, crane beam and other parts and components

　　2.Substitute materials do not meet the requirements;

　　3.The camber of steel roof truss does not meet the requirements of design and specification.

　　4.The surface damage of components is serious.

　　5. serious deformation of components.

All of the above are defects easy to occur in the manufacturing process of steel structure. steel structure company is a professional contracting company integrating design, manufacturing and installation. It has been established for more than ten years, strictly checking the above defects, strictly controlling the manufacturing process of components, and paying lifelong system for the quality of all components leaving the factory.