Generally, each project is judged on its use of structural steel pipes from both an architectural and structural engineering perspective. Steel pipe remains much cost effective compared with many other construction materials. Besides, structural steel pipe is considered an environment friendly building material in construction industry. Although the steel pipe price is not so stable in the market, this is still comparatively lower than the ready-mix concrete prices in the same period.

Galvanized steel pipe generally has the rational cost effective in the market. Unlike other structural steel materials, galvanized steel is immediately ready for use when it is delivered. No additional preparation of the surface is required, no time-consuming inspections, additional painting or coatings are needed. Once the structure is assembled, contractors can immediately begin the next stage of construction without having to worry about the galvanized steel materials. Testing and studies have revealed that the average life expectancy for galvanized steel used as a typical structure material is well beyond 50 years in a rural environment and 20-25 years or more in an extreme urban or coastal setting.

Rectangular steel pipe is one member of the hollow structural sections which are metal profiles with square or rectangular tube section. Rectangular hollow sections are cold formed and welded from either hot rolled, cold rolled, pre-galvanized or stainless steel. Rectangular steel pipe has many uses such as structural applications in residential, commercial and industrial construction. Besides, as the flat square surfaces of rectangular steel pipe has the ability to ease construction, they are sometimes preferred for architectural aesthetics in exposed structures. Today, rectangular steel pipes have also become very popular in many forms of construction and other structural & mechanical applications.