1. Light weight of steel structure 2. High reliability of steel structure work 3. Good vibration (shock) and impact resistance of steel 4. The industrialization of steel structure manufacturing is relatively high 5. Steel structures can be assembled quickly and accurately 6. Large steel structure indoor space 7. Easy to make a sealed structure 8. Corrosion of steel structures 9. Poor fire resistance of steel structures 10. Recyclable steel structure 11. Short construction time for steel structures