A square hollow section (SHS) pipe is a type of steel pipe that has a square cross-sectional shape. It is commonly used in the construction industry for building frames, supports, and other structural applications. The SHS pipe is made of high-strength steel and is typically produced in standard lengths, with a range of wall thicknesses and sizes available to suit different applications. The square shape of the pipe provides added strength and stability compared to other pipe shapes. It is also easy to join and weld, making it a versatile and widely used material in the construction industry.