Purlins
Purlins help in making the entire roof structure more rigid by adding horizontal support throughout the span of the roof. The use of purlin is common in pre-engineered buildings or PEB. In steel constructions, purlins are available in different shapes and are usually made of cold-formed steel that is thin enough to be fastened with screws.
Purlins are part of the secondary framing of construction and help in distributing the load from the roof to the main framing and other major structural elements.
Purlins come in a variety of shapes and are most commonly named after the shape of their cross-section such as,
Types of Purlins
Z Purlins
Z Purlins are shaped like the letter “Z” and are used for roofing and wall structures. Their overlapping design makes them ideal for large spans and continuous lengths. Z Purlins offer excellent structural strength and are commonly used in industrial and commercial buildings.
C Purlins
C Purlins, with their “C”-shaped cross-section, are widely used for supporting walls and floors. These purlins are easy to install and offer a high strength-to-weight ratio, making them a cost-effective choice for various steel construction applications.
Sigma Purlins
Sigma Purlins have a more complex cross-section that resembles the Greek letter “Σ”. These purlins provide enhanced structural performance, especially in high-load environments. They are known for their rigidity and efficiency in handling heavy roof loads and wind pressures.