Unlock the potential of Square Hollow Sections Pipes in structural engineering. Learn about their benefits and applications Square hollow sections (SHS) are another popular type of structural steel tube that’s kind of a middle-man between RHS and CHS in terms of attributes, appearance, and structural behaviour. SHS features a flat surface that’s also economical for joining and welding, with clean lines & minimal edge preparation required. SHS also features attributes of CHS, with its symmetrical appearance, formed in equal-sided square hollow sections – as opposed to circular sections. SHS provides an ideal balance between strength, functionality, and aesthetic appearance for a multitude of applications that require all three aspects.