Ningxia Xinjiuheng Steel Structure Engineering C

The selection principles for steel structural materials are to ensure the load-bearing capacity of the structural components and prevent brittle failure under certain conditions. This is achieved through a comprehensive consideration of factors such as the importance of the structure, load characteristics, structural form, stress state, connection methods, steel thickness, and working environment.
The four steel grades specified in the "Code for Design of Steel Structures" GB50017-2003 are recommended for use, and should be the first choice when conditions permit. The code does not prohibit the use of other grades, as long as the steel meets the requirements of the standard.