In steel construction, the term Purlin typically refers to roof framing members that span parallel to the building eave, and support the roof decking or sheeting. The purlins are in turn supported by rafters or walls. Purlins are most commonly used in Metal Building Systems, where Z-shapes are utilized in a manner that allows flexural continuity between spans.

It is the practice in the steel industry that structural shapes are assigned representative designations for convenient shorthand description on drawings and documentation: Channel sections, with or without flange stiffeners, are usually referenced as C shapes; Channel sections without flange stiffeners are also referenced as U shapes; Point symmetric sections that are shaped similar to the letter Z are referenced as Z shapes. Section designations can be regional and even specific to a manufacturer. In steel building construction, secondary members such as purlins (roof) and girts (wall) are frequently cold-formed steel C, Z or U sections, (or mill rolled) C sections.

Cold formed members can be efficient on a weight basis relative to mill rolled sections for secondary member applications. Additionally, Z sections can be nested for transportation bundling and, on the building, lapped at the supports to develop a structurally efficient continuous beam across multiple supports.

Features of NF Purlins

  • The sections are lightweight thus putting minimal load on other structures / foundation / support.
  • Factory-finished Purlins minimize wastage and save the installation time.
  • Exact amalgamation of optimum sections and particular design specifications.
  • Strength to weight ratio is higher.
  • Yield strength and safety are leveraged due to cold forming.
  • The sections are maintenance-free since they are painted / galvanized.
  • The sections are cut to sizes and are supplied in pre-punched condition thus making erection easy and minimizing wastage / rework at the site.
  • Custom stainless steel wire clips available for simple wire management
  • Industry leading standards-certified Quick Mount PV roof attachments
  • Compatible with composition, flat tile, S-Tile, and standing seam roof types Compatible mounting hardware

Advantages of NF Purlins

  • Lightweight sections, hence puts minimal load on other structures/ foundations/ supports
  • Factory-finish minimizes wastage and installation time
  • Exact amalgamation of optimum sections and particular design specifications
  • Strength to weight ratio is high
  • Yield strength and safety is leveraged due to cold forming
  • Maintenance free since they are painted/ galvanized
  • Supplied in pre-punched condition and are cut to sizes, thereby making erection easy and minimizing wastage/rework at the site
  • Used in industries like Power, Cement, Steel, metallurgical, Airport, Automobile and Textile Sectors