Q: What is Q345 used for in high-rise buildings?
A: It is used for main building steel columns, steel beams, load-bearing frames, steel structure floor frames, and core tube load-bearing components.
Q: Can Q345 be used in factory steel structures?
A: It is a main material used in workshop steel structure columns, roof steel beams, crane beams, and factory portal frames.
Q: Why is Q345 used extensively in bridge engineering?
A: It has strong load-bearing capacity, vibration resistance, fatigue resistance, and wind pressure resistance, making it suitable for highway bridges, railway bridge box girders, and pier supports.
Q: Where is Q345 used in stadiums and convention centers?
A: Large-span roof trusses, space frame structures, cantilever steel structures, and grandstand load-bearing frames.
Q: What are the uses of Q345 in subway and tunnel engineering?
A: Tunnel steel arch frames, support steel, subway station steel structures, and embedded load-bearing components.