Hollow structural section

"Structural tubing" redirects here. For other uses, see Tubing.

A hollow structural section (HSS) is a type of metal profile with a hollow cross section. These profiles can be circular, square, or rectangular sections, although other shapes such as elliptical are also available.

In Europe, or other countries which follow EN 10210 or EN 10219 standards, the term HSS is not used. Rather, the three basic shapes are referenced as CHS, SHS, and RHS, being circular, square, and rectangular hollow sections. As an example, CHS 200 x 10 would be a Circular Hollow Section with an outer diameter of 200 mm and a wall thickness of 10 mm.

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