Tube is one of the most rational profile types for building metal structures.
Hot rolled steel weldless tubes made of carbon steel with the diameter from 50 to 400 mm and wall thickness of 4-25 mm are usually used.
In industrial building structures tubes are used not only to reduce the weight of the structure but also to underline special architectural appearance of the facility.
The use of tubes in such types of structures as trusses can provide weight reduction up to 30 %. Therefore, at existing price ratio the use of tubes sometimes provides construction cost reduction.
Tube slender sections (round or square) with wall thickness from 2 to 12 mm and diameter of up to 500 mm or square side of up to 400 mm are most often used in construction.