Advantages of Hollow Structural Steel Sections (HSS)
HSS has many various applications in different industries such as Construction, Oil and Gas, Municipal Engineering and many other industries.
HSS stands for Hollow Structural Section that is a metal proﬁle with a hollow cross section. Round, square and rectangular shapes of HSS proﬁles have many applications in various industries.
HSS proﬁles are being manufactured in 2 methods:
- Traditional production method
(welding and cutting by manpower)
- Modern industrial production method
(by fully automated and integrated machinery) Traditional production has the following shortcomings:
- High percentage of workforce errors and thus less reliability
- Increased production time
- Increased required workforce
- Increased Production expense
- Considerable residual stress in welding zone
Modern industrial production method doesn’t have the above shortcomings.
Steel Advantages vs. Other Construction Materials
- Steel construction is naturally faster than concrete or masonry
- Due to its strength, structures built using steel are usually lighter than those made of other materials
- Steel is fully recyclable
- Due to its strength, construction using structural steel generally provides more room for open spaces, which is desirable in terms of architecture and aesthetics
- Due to higher strength, steel is known to provide the best strength-to-weight ratio compared to other construction material such as concrete or timber
HSS (produced by modern manufacturing) advantages vs. other structural steel sections
- Better strength-to-weight ratio
- Stronger in torsion
- Best for columns due to symmetry and material placement
- Better welding quality
- Useful in lightweight construction and better performance against earthquake forces
- Useful in space structures
- Better looking architectural exposure
- Decreased construction costs and being more economical
- Made to measure proﬁle lengths
- Much easier composite construction by using concrete-ﬁlled
• Comparing HSS with the Other Structures Economically
The following table indicates why using HSS, leads to time saving, higher quality and lower costs.
HSS AGAINST EARTHQUAKE
As indicated before one of the most important applications of HSS is in the construction industry. Generally, using steel structure is more beneﬁcial than other structures and construction materials such as concrete, and with no doubt HSS is one of the bests among them. Having two or more axes of symmetry and large radii of gyration, HSS proﬁles are the most suitable choices as columns or beam-columns of the main load resisting systems of structures.
The tubular form of HSS is inherently strong and efﬁcient compared to other steel proﬁles, since its material is the farthest from the centroidal axes. Furthermore, all section parts are considered “stiffened” according to AISC standards. Hence, HSS has a better strength to weight ratio, even when compared to other structural sections. A lower weight naturally leads to easier construction, reduced earthquake induced loads reduced erection and transportation costs, and more economical design of other structural parts such as foundations. This also makes HSS suitable for extension of existing buildings without overloading their foundations. According to researches it is proven that concrete structures are the most earthquake prone. This arises from undeniable errors of workforces in built-up sections. Also the workshop errors in making steel structures are not negligible as there is high residual stress in the sections by this method resulting from several cutting and welding processes repeatedly which leads to structure vulnerability during earthquake.
HSS AGAINST EARTHQUAKE
Therefore, it is certainly essential to be more accurate in selecting resistant and reliable materials in many regions such as Iran which are exposed to earthquake hazards. HSS produced by modern industrial method is the safest and the most credible construction material against this natural disaster.
“For further information about structural connections and different explanations in technical and design instructions of HSS, a guidebook compiled by our engineering team is available at ATENA central ofﬁc