1. Structural Stability During Installation
Large-span trusses are usually heavy and long lengths have to be carried without any support. Temporary instability can occur while hoisting and erecting, prior to completion of the full structural system.
Solution:
Engineers employ temporary support structures, sequential building techniques, and structural instrumentation to maintain stability during construction.
2. Precision Fabrication and Assembly
A large-span truss consists of numerous steel members, including H beams, box sections, steel pipes, and connection plates. Even minor fabrication deviations can affect the final installation accuracy.
Solution:
Advanced CNC fabrication equipment, 3D modeling, and BIM technology are widely used to improve manufacturing precision and reduce assembly errors.
3. Transportation and Logistics
Many truss parts are larger than standard transport dimensions and pose logistical problems for projects at home and abroad.
Solution:
The building is usually split into portable sections that are then joined together at the building site. Advanced planning for the transport made it possible for the arrival of the load to be safe and efficient.
4. Heavy Lifting Operations
Large-span steel structure projects often require lifting components weighing dozens or even hundreds of tons.
Solution:
The Specialty Lifting Equipment (SLE), solid line parallel hoisting systems and detailed lifting simulations, among others, are used to ensure the safety and construction efficiency.
5. Wind and Weather Effects
Large-span structures are highly sensitive to wind loads during construction, especially before the roofing system is installed.
Solution:
Construction schedules are adjusted based on weather forecasts, and temporary bracing systems are used to increase the structural resilience.
