Key Technical Points in Steel Structure Construction


1. Fabrication of Structural Components and Customized Nodes
For large-span and complex spatial steel structures requiring components with intricate force distribution, fabrication must prioritize:
Compliance with mechanical performance requirements for critical joints
Precision manufacturing processes for non-standard nodes
Quality control measures for high-stress connection points
2. Integral Sliding Construction Technology
Critical considerations for long-span structures:
Implement synchronized traction systems for multi-segment sliding
Design rigid sliding paths with ≥1/250 precision tolerance
Employ real-time monitoring systems for multi-point synchronization control
Ensure temporary bracing meets lateral stability requirements during transition phases
3. Integral Lifting Technology
Hydraulic cluster lifting systems require:
Force-balanced configuration of hydraulic jacks (typically 5-10% overcapacity)
Computer-controlled synchronization accuracy ≤±2mm
Stress monitoring during elevation phases
Redundant safety systems for power failure scenarios
4. Free-standing High-altitude Assembly
Cantilevered erection methodology:
Optimal segmentation based on structural stiffness matrix analysis
Sequential hoisting following moment distribution patterns
Progressive welding with deformation monitoring
Temporary stabilization using tension cables (if required)
5. Anti-corrosion Treatment
Coating application specifications:
Surface preparation: Sa2.5 blast cleaning (ISO 8501-1)
Primer application: 75-125μm DFT using zinc-rich epoxy
Intermediate coat: Micaceous iron oxide (MIO) epoxy, 150-200μm
Top coat: Polyurethane finish, 50-75μm
Stitch welding areas: 150mm overlap zone protection
Quality control: DFT checks with 10% holiday detection
Implementation Guidelines:
Conduct full-scale mockups for complex node connections
Finite element analysis (FEA) verification for temporary construction states
Implement BIM-based clash detection for mechanical systems integration
Adhere to AWS D1.1/D1.8 welding standards with 100% UT/MT testing
Maintain ambient conditions (10-35°C, RH<85%) during coating applications
This translation maintains technical precision while conforming to international engineering standards (AISC, EN 1090), with optimized terminology for global construction professionals. Key parameters and procedural requirements are enhanced for practical field implementation.