Purlins
In building construction, steel purlins are horizontal structural components that carry loads to the main structural frame and support the roof covering.
Types of Purlins
- C-Purlins: C-purlins, which have a horizontal web, two flanges, and a letter "C"-shaped shape, are frequently used in roof building. They are frequently positioned regularly throughout the length of the roof and supported by rafters or trusses.
- Z-Purlins: Shaped like the letter "Z" with a vertical web and two flanges, Z-purlins are similar to C-purlins but offer greater load-bearing capacity due to their shape. They are often used in larger roof spans or heavier load applications.
- U-Purlins: Also known as channel purlins, U-purlins have a U-shaped cross-section and are used primarily for wall framing or as floor joists in some applications.
Purlins are installed horizontally along the length of the roof or wall, supported by the primary structural frame and are typically fixed to the supporting structure using bolts, screws, or welds, ensuring secure attachment and load transfer.
Purlins offer high strength-to-weight ratio, reducing the overall weight of the roof or wall structure and are more economical than traditional solid beams or trusses, resulting in lower material and labour costs.
Purlins are a cost-effective and efficient building option since they come in a variety of forms, sizes, and materials to suit the unique needs of any client and project.
