Z and C purlin

Purlins are essential structural components used in roofing systems, especially in metal and steel buildings. They are horizontal members that run along the length of a roof, supporting the roof sheets or panels and transferring loads to the primary structural frame, such as rafters or building columns.

Typically made from cold-formed steel (like GI or MS), purlins come in various shapes—most commonly C, Z, and Sigma profiles. C-purlins are usually used at the edges of the roof, while Z-purlins can overlap and are preferred for continuous spans, offering more strength and material efficiency.

Purlins are spaced at regular intervals and are crucial for distributing the weight of the roof, withstanding wind and snow loads, and providing a base for fixing roofing sheets. They reduce the need for heavy support beams, making structures lighter and more economical.

In addition to roofs, purlins are also used in wall cladding systems. They are easy to install, customizable in length and thickness, and suitable for industrial sheds, warehouses, and commercial buildings. Their corrosion resistance, especially when galvanized, ensures long-term durability and structural performance.