For large components such as main girders, the segmental lifting method is employed, utilizing balancing beams and lifting slings to achieve smooth elevation. During hoisting, real-time monitoring of component verticality and horizontality is conducted, with deviations corrected through fine adjustments using jacks. High-strength friction bolt connections are prioritized for jointing, tightened in symmetrical sequence and in stages to the design torque value to ensure reliable load transfer at nodes.