Sigma Purlins

SIGMA SECTION /purlins are accurately roll formed from high strength steel to provide an efficient, light weight and economical roofing and cladding support system for structural steel buildings. SIGMA SECTION /purlins are quick to install and suitable for both insulated and noninsulated roofs and walls.

The thickness and height of the purlin selected depend on span length and loads.

Section-typeSigma sections
Thickness1.5–3.0 mm Minimum length ___________ Maximum length __________
MaterialHot galvanized steel sheet

Common applications include

  • Industrial construction
  • Hall and warehouse construction
  • Extension construction and renovation


  • Compact design
  • Rust proof surface finish
  • Robust structure
  •  Simple installation