Steel structure buildings can be classified according to different standards. Here are some common classification methods:

1. Classification by purpose:
1.1 Industrial buildings: such as factories, workshops, warehouses, etc.
1.2 Civil buildings: such as office buildings, commercial centers, schools, etc.
1.3 Public buildings: such as gymnasiums, exhibition halls, hospitals, etc.

2. Classification by structural form:
2.1 Frame structure: A frame composed of steel columns and steel beams, suitable for multi-story buildings.
2.2 Grid structure: A mesh structure composed of steel pipes or steel bars, suitable for large-span buildings.
2.3 Arch structure: A structure formed by arch components, suitable for specific building forms.

3. Classification by seismic performance:
3.1 Ordinary seismic structure: Suitable for areas with low seismic requirements.
3.2 High seismic structure: Consider higher seismic standards when designing, suitable for areas with frequent earthquakes.

4. Classification by construction method:
4.1 On-site assembly structure: Steel structure assembled at the construction site.
4.2 Prefabricated structure: Steel structure that is prefabricated in the factory and then transported to the site for assembly.

5. Classification by material:
5.1 All-steel structure: Mainly composed of steel, with high strength and durability.
5.2 Steel-concrete structure: Combines the advantages of steel and concrete, suitable for different load requirements.

These classification methods can help choose the appropriate structural form and material according to specific needs when designing and constructing steel structure buildings.