Heavy steel structure factory building project (300-ton overhead crane with lattice column structure)

The heavy steel structure workshop project, undertaken by HCGG, is a key supporting project for the region's high-end equipment manufacturing industry. The core component is a 300-ton heavy-duty overhead crane. The main structure utilizes a lattice column load-bearing system, with a total construction area of ​​33,000 square meters and steel consumption of 5,600 tons. Upon completion, it will become a high-standard production facility integrating heavy equipment production, large component processing, and precision equipment assembly, effectively filling the gap in high-end manufacturing production space in the region, helping local manufacturing transform and upgrade towards intelligence and high-end manufacturing, and injecting new momentum into the high-quality development of local industries.

The project's main structure adopts a full heavy steel structure design. Its core highlight is the use of lattice columns as the main load-bearing components. Compared to traditional solid-web columns, lattice columns offer significant advantages such as high load-bearing capacity, high stiffness, small cross-sectional dimensions, and high steel utilization, perfectly adapting to the operational needs of the 300-ton heavy-duty overhead crane. This effectively transmits the enormous vertical and horizontal loads generated during crane operation, ensuring the safe and stable operation of the structure. Meanwhile, the application of lattice columns significantly reduces steel consumption, balancing green energy conservation and economy. It fully complies with the stringent structural requirements for large-tonnage crane workshops in the "Code for Structural Design of Non-ferrous Metal Industrial Plants," and can fully meet the production environment needs of high-end manufacturing industries for ultra-high loads, large spaces, and high stability.

During construction, the project faced multiple technical challenges:the installation of the 300-ton crane required extremely high structural load-bearing precision; the fabrication precision and welding quality of the lattice columns directly determined the crane's operational safety. Each lattice column was 30 meters long and weighed over 30 tons, employing a double-lattice structure with complex splicing processes and stringent deformation control requirements. Simultaneously, high-altitude hoisting operations required precise control of lifting point positions, aerial posture adjustments, and docking accuracy. Furthermore, the complex working conditions in the construction area and the limited effective construction window further increased the construction difficulty. To ensure high-quality project progress, the project team assembled a professional technical team, conducted specialized feasibility studies in advance, and developed a detailed construction plan. Utilizing digital modeling and precision factory manufacturing, they strictly controlled every step of the process, including lattice column material preparation, welding, and rust removal. Sandblasting was employed to ensure components met factory precision standards. During the hoisting phase, a "dual-machine collaborative" approach was adopted, deploying large-scale lifting equipment, precisely calculating lifting points and travel paths, and using specialized hoisting spreader beams to ensure stable placement of the lattice columns, with verticality and elevation fully meeting specifications.

During project implementation, the team rigorously implemented a safety management and quality control system. Key processes such as high-altitude welding and heavy hoisting were subject to full-process on-site supervision. They strengthened the inspection of lattice column joint connections and weld quality, focusing on key aspects such as inter-column bracing and roof support system installation to eliminate safety hazards and quality issues. Simultaneously, the construction process was optimized, the construction plan was dynamically adjusted, and personnel and equipment were rationally allocated. While ensuring construction safety and project quality, the project was efficiently advanced, striving for early completion and delivery. The successful progress of this project not only demonstrates the strong technical strength and problem-solving capabilities of XX Construction Group in the field of heavy steel structure construction, but also provides high-standard and safe production space for high-end equipment manufacturing enterprises, effectively improving their production efficiency and capacity, and helping the regional manufacturing industry take a solid step towards transformation and upgrading.