Since ancient times, the construction industry has been known as a traditional industry with low productivity. According to recent studies, this process takes time and has progressed slowly; But with the introduction of technology in this industry in recent decades and using prefabricated parts, the construction of buildings ends faster.

 

In a general definition, urban planning is the intervention and regulation of space in order to improve the quality of life of residents.

 

Many structural engineers are aware of the advantages of HSS in construction, but since the production of these hollow sections in Iran was limited in the past, engineers had no choice but to use sections made with sheets instead of using these sections.

 

Although traditionally made sections are similar in appearance to HSS sections, often, the welding process and low quality of their construction greatly affect the final quality of the products. Instead, the amount of welding damage and residual stress in HSS is significantly lower.