In modern construction engineering, grid steel structures are widely used in large sports venues, exhibition halls, airport terminals and other buildings due to their excellent performance and beautiful appearance. There are various construction methods for grid steel structures, among which the integral lifting method plays a key role in specific projects due to its unique advantages.

Introduction to Integrated Lifting Method
The overall lifting method, as the name suggests, is to lift the fully assembled grid steel structure on the ground to the design installation position in one go through large lifting equipment. This process requires precise calculation and rigorous organization to ensure the stability and safety of the truss during lifting.
Before construction, a flat and solid assembly platform needs to be built on the ground. Construction personnel assemble each rod and node accurately according to the design drawings, like building giant blocks, gradually constructing a complete grid structure. In this process, extremely high assembly accuracy is required, and any slight deviation may affect subsequent lifting and overall structural safety.
After completing the ground assembly, it is the crucial lifting step. The selection of suitable lifting equipment is crucial, usually based on the weight, size, installation height, and construction site conditions of the grid, large crawler cranes, tower cranes, etc. are chosen. It is also common for multiple cranes to work together. By setting reasonable lifting points and precise command and coordination, it is ensured that the grid structure remains horizontal during the lifting process and that all parts are evenly stressed.
Key analysis
Structural verification
Before construction, a comprehensive structural verification must be conducted on the grid steel structure. Consider various load effects during the lifting process, such as self weight, wind load, dynamic load, etc., to ensure that the grid structure has sufficient strength, stiffness, and stability during the lifting stage. This requires engineers to have solid knowledge of structural mechanics and rich engineering experience, and to use professional software for precise simulation analysis.
Hanging point setting
The reasonable setting of lifting points directly affects the success or failure of lifting. The number, location, and layout of lifting points need to be determined based on the shape of the grid, the distribution of the center of gravity, and the performance of the lifting equipment. The general principle is to arrange the lifting points evenly and avoid local stress concentration. At the same time, the connection method between the lifting point and the grid structure should be considered to ensure that the connection is firm and reliable, and can withstand various forces during the lifting process.
Synchronous control
When multiple cranes are used for collaborative operation, synchronous control becomes a key point. The lifting speed and height of each crane must be consistent, otherwise it may cause uneven stress on the grid structure, leading to deformation or even damage. For this purpose, advanced synchronous control systems are often used to monitor the real-time operation status of each crane through sensors. Once deviations are detected, they can be quickly adjusted to ensure a smooth and orderly lifting process.
Emergency plan
Although sufficient preparation and careful planning are carried out before construction, unexpected situations such as equipment failure and sudden weather changes may still occur during the lifting process. Therefore, it is essential to develop a comprehensive emergency plan. The contingency plan should cover various possible risks, clarify the emergency response process and division of responsibilities, equip necessary emergency equipment and materials, ensure that effective measures can be taken quickly in case of emergencies, and guarantee the safety of personnel and the smooth progress of the project.
Environmental considerations
The environmental factors at the construction site, such as site conditions and weather conditions, have a significant impact on the overall lifting method. The site should be flat and solid, meeting the walking and standing requirements of lifting equipment; If the site is narrow or the terrain is complex, it will increase the difficulty and risk of construction. In terms of weather, adverse weather conditions such as wind, rain, and heavy fog can affect the safety and accuracy of lifting operations. It is necessary to strictly follow relevant standards and stop lifting operations under adverse weather conditions.
The overall hoisting method of grid steel structure is an efficient and advanced construction method, but various factors need to be fully considered and each key point strictly controlled during the implementation process. Only in this way can we ensure the quality and safety of the project, smoothly complete the installation of the grid steel structure, and lay a solid foundation for the construction of various large-scale buildings.