Structural Hollow Sections (SHS) are very effective in resisting buckling loads, resulting in a high strength-to-mass ration. High flexural stiffness in all directions is combined with high torsional stiffness.
When used as beams, the need for lateral support is reduced. Columns and beams do not need to be checked for torsional-flexural buckling if they fall within the limits of the slenderness ratio or when the height-to-breadth ratio of these sections does not exceed 2 to 1.
The result is less material usage and a competitive engineering solution. The lighter, yet stiffer structural members simplify the erection as longer spans can be pre-fabricated. Connecting members are typically joined by welding under strict factory conditions.