A hollow structural section (HSS) is a type of metal profile with a hollow cross section. The term is used predominantly in the United States, or other countries which follow US construction or engineering terminology.
HSS members can be circular, square, or rectangular sections, although other shapes such as elliptical are also available. HSS is only composed of structural steel per code.
| Product | Square Hollow Sections |
| Thickness | 1.0mm up to 16.0mm |
| Nominal Size | 12mm x 12mm up to 380mm x 380mm |
| Product | Rectangular Hollow Sections |
| Thickness | 1.0mm up to 16.0mm |
| Nominal Size | 12mm x 25mm up to 300mm x 400mm |
