Purlins are horizontal bars or beams used for structural support. They are generally used below the roof and supported by building walls or rafters. Purlins reinforce the rafters together. Steel purlins are generally used in pre-engineered structures. These purlins come in a variety of sizes and thicknesses, depending on load requirements and the overall design of the building. while Z and C purlins serve similar purposes, their application and requirements depend upon the specific requirements of the project.

There are generally 2 types of Purlins

• ·         Z Purlins
• ·         C Purlins

Z purlins: As the name depicts, Z means they resemble like Z in their structure; they are mostly made up of cold-forming sheets. The distinct feature is an overlapping flange that allows an east connection to the primary steel building. The Z shape allows resistance against bending and twisting, offering better stability and strength. Z purlins are generally used in complex buildings where there is a high load requirement.

C purlins: as the name depicts C, it means they resemble C in their structure. However, they do not offer the same overlapping feature as Z purlins, so they are generally used in roof and wall claddings in smaller and lightweight buildings. C purlins are preferred because of their ease of installation and variety of building designs. They are generally employed in residential and agricultural buildings.

What’s the difference between Z and C purlins?