3X3X600cm Steel Square Pipe
The construction and engineering industries use hollow structural sections (HSS). HSS is a form of steel tubing and is commonly circular, square or rectangular. In the UK the term HSS is not used. Instead the basic shapes are named CHS (circular), SHS (square) and RHS (rectangular).
Rectangular HSS are commonly used in welded steel frames which are subjected to loading from different directions. Square and circular HSS are often used as columns.