Hollow Structural Sections (HSS)

In civil and structural engineering, HSS refers to high-strength metal profiles with a hollow tubular cross-section. Unlike solid beams, HSS provides a high strength-to-weight ratio, making it the preferred choice for modern architecture, bridges, and solar tracker frames.

The geometry is key: HSS is available in square, rectangular, and round shapes. Because they are hollow, they are more efficient at resisting torsional (twisting) loads than traditional I-beams.