In the steel structure, those belong to the main steel structure, and those belong to the secondary steel structure
The main frame is steel is steel frame, steel structure, steel purlin is time support retaining structure.
The main steel member is the load-bearing member! It is the steel frame, steel columns, purlins, while those belonging to, in order to reinforce the enclosure, the steel structure is a steel member!
The steel structure, like other structures, has a load-bearing structure and a non load bearing structure!
